XLPE Cable-Current Rating

April 24, 2011 200 Comments

XLPE Insulated Armored & Unarmored Cables:

1.1 KV SINGLE CORE AL/COPPER COND,XLPE INSULATED CABLES As per IS:7098 (Part-I)
Cross-sectional area        (Sq MM)

UN-ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
1cX4

8

  —  —  —  48  47  45  0.376  0.572
1cX 6  9  48  45  45  60  59  57  0.564  0.858
1cX10  10  62  62  61  80  78  77  0.940  1.430
1cX16  11  81  80  83  104  102  106  1.504  2.288
1cX25  12  99  90  115  130  115  145  2.350  3.575
1cX 35  13  117  110  135  155  140  175  3.290  5.005
1cX50  15  138  125  170  185  165  215  4.700  7.150
1cX70  16  168  155  210  225  200  270  6.580  10.01
1cX 95  18  204  185  255  265  235  330  8.930  13.59
1cX120  20  230  210  300  300  265  380  11.28  17.16
1cX150  22  265  230  342  335  300  430  14.10  21.45
1cX185  24  295  260  385  380  335  495  17.39  26.46
1cX240  27  340  300  450  435  385  590  22.56  34.32
1cX300  30  390  335  519  490  430  670  28.20  42.90
1cX400  33  450  380  605  550  480  780  37.60  57.20
1cX 500  36  500  430  700  610  530  900  47.00  71.50
1cX 630  40  555  485  809  680  590  1020  59.22  90.09
1cX800  47  625  530  935  740  630  1140  75.20  114.40
1cX1000  51  690  570  1065  780  660  1250  94.00  143.00
                   

1.1 KV SINGLE CORE AL/COPPER COND,XLPE INSULATED CABLES As per IS:7098 (Part-I)
Cross-sectional area        (Sq MM)

ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
1cX4  10  —  —  —  48  47  45  0.376  0.572
1cX 6  11  45  45  40  60  59  57  0.56  0.858
1cX10  12  59  62  53  80  78  77  0.94  1.43
1cX16  13  76  80  73  104  102  106  1.50  2.29
1cX25  14  99  90  115  130  115  145  2.35  3.58
1cX 35  15  117  110  140  155  140  175  3.29  5.01
1cX50  17  138  125  170  185  165  215  4.70  7.15
1cX70  19  168  155  210  225  200  270  6.58  10.01
1cX 95  22  204  185  255  265  235  330  8.93  13.59
1cX120  24  230  210  300  300  265  380  11.28  17.16
1cX150  25  265  230  342  335  300  430  14.10  21.45
1cX185  28  295  260  385  380  335  495  17.39  26.46
1cX240  30  340  300  450  435  385  590  22.56  34.32
1cX300  33  390  335  519  490  430  670  28.20  42.90
1cX400  38  450  380  605  550  480  780  37.60  57.20
1cX 500  41  500  430  700  610  530  900  47.00  71.50
1cX 630  46  555  485  809  680  590  1020  59.22  90.09
1cX800  51  625  530  935  740  630  1140  75.20  114.40
1cX1000  56  690  570  1065  780  660  1250  94.00  143.00
                   

1.1 KV Two CORE AL/COPPER COND,XLPE INSULATED As per IS:7098(Part-I)
Cross-sectional area        (Sq MM)

UN-ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
2cX4  13  34  28  30  44  37  39  0.376  0.572
 2cX 6  14  43  37  40  55  47  50  0.564  0.858
2cX10  17  57  48  53  74  61  67  0.940  1.430
2cX16  17  78  61  70  94  78  85  1.50  2.29
2cX25  19  95  80  99  120  100  125  2.35  3.58
2cX35  20  116  94  117  145  120  155  3.29  5.01
2cX50  22  140  110  140  170  145  190  4.70  7.15
2cX70  25  170  140  176  210  175  235  6.58  10.01
2cX95  28  200  165  221  250  210  290  8.93  13.59
2cX120  31  225  185  258  285  240  330  11.28  17.16
2cX150  33  255  210  294  315  270  375  14.10  21.45
2cX185  37  285  235  339  355  300  435  17.39  26.46
2cX240  41  325  270  402  410  350  510  22.56  34.32
2cX300  44  370  305  461  460  390  590  28.20  42.90
2cX400  48  435  350  542  520  440  670  37.60  57.20
2cX500  54  481  405  624  580  480  750  47.00  71.50
2cX630  62  537  470  723  680  575  875  59.22  90.09
                   
                   

1.1 KV Two CORE AL/COPPER COND,XLPE INSULATED As per IS:7098(Part-I)
Cross-sectional area        (Sq MM)

ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
2cX4  15  34  28  30  44  37  39  0.376  0.572
 2cX 6  16  43  37  40  55  47  50  0.564  0.858
2cX10  18  57  48  53  74  61  67  0.940  1.430
2cX16  19  78  61  70  94  78  85  1.50  2.29
2cX25  21  95  80  99  120  100  125  2.35  3.58
2cX35  23  116  94  117  145  120  155  3.29  5.01
2cX50  25  140  110  140  170  145  190  4.70  7.15
2cX70  28  170  140  176  210  175  235  6.58  10.1
2cX95  31  200  165  221  250  210  290  8.93  13.59
2cX120  34  225  185  258  285  240  330  11.28  17.16
2cX150  37  255  210  294  315  270  375  14.10  21.45
2cX185  40  285  235  339  355  300  435  17.39  26.46
2cX240  45  325  270  402  410  350  510  22.56  34.32
2cX300  49  370  305  461  460  390  590  28.20  42.90
2cX400  52  0.33  435  350  542  520  440  670  37.60
2cX500  60  0.34  481  405  624  580  480  750  47.00
2cX630  66  0.36  537  470  723  680  575  875  59.22
                   

1.1 KV Three CORE AL/COPPER COND,XLPE INSULATED As per IS:7098(Part-I)
Cross-sectional area        (Sq MM)

UN-ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
3cX 4  14  34  28  30  44  37  39  0.376  0.572
3cX 6  16  43  37  40  55  47  50  0.564  0.858
3cX 10  18  57  48  53  74  61  67  0.940  1.430
3cX 16  18  78  61  70  94  78  85  1.50  2.29
3cX 25  21  95  80  99  120  100  125  2.35  3.58
3cX 35  22  116  94  117  145  120  155  3.29  5.01
3cX 50  25  140  110  140  170  145  190  4.70  7.15
3cX 70  30  170  140  176  210  175  235  6.58  10.01
3cX 95  32  200  165  221  250  210  290  8.93  13.59
3cX 120  35  225  185  258  285  240  330  11.28  17.16
3cX 150  39  255  210  294  315  270  375  14.10  21.45
3cX 185  43  285  235  339  355  300  435  17.39  26.46
3cX 240  49  325  270  402  410  350  510  22.56  34.32
3cX 300  53  370  305  461  460  390  590  28.20  42.90
3cX 400  59  435  350  542  520  440  670  37.60  57.20
3cX 500  66  481  405  624  580  480  750  47.00  71.50
3cX 630  73  537  470  723  680  575  875  59.22  90.09
                   

1.1 KV Three CORE AL/COPPER COND., PVC INSULATED CABLES As per IS:1554 (Part-I)
Cross-sectional area        (Sq MM)

ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
3cX 4  18  34  28  30  44  37  39  0.376  0.572
3cX 6  19  43  37  40  55  47  50  0.564  0.858
3cX 10  20  57  48  53  74  61  67  0.940  1.430
3cX 16  20  78  61  70  94  78  85  1.50  2.29
3cX 25  23  95  80  99  120  100  125  2.35  3.58
3cX 35  25  116  94  117  145  120  155  3.29  5.01
3cX 50  29  140  110  140  170  145  190  4.70  7.15
3cX 70  32  170  140  176  210  175  235  6.58  10.01
3cX 95  35  200  165  221  250  210  290  8.93  13.59
3cX 120  39  225  185  258  285  240  330  11.28  17.16
3cX 150  43  255  210  294  315  270  375  14.10  21.45
3cX 185  48  285  235  339  355  300  435  17.39  26.46
3cX 240  53  325  270  402  410  350  510  22.56  34.32
3cX 300  58  370  305  460  460  390  590  28.20  42.90
3cX 400  65  435  350  542  520  440  670  37.60  57.20
3cX 500  72  481  405  624  580  480  750  47.00  71.50
3cX 630  81  537  470  723  680  575  875  59.22  90.09
                   

1.1 KV Three CORE AL/COPPER COND,XLPE INSULATED As per IS:7098(Part-I)
Cross-sectional area (Sq MM)

UN-ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
 3.5X25  22  95  80  99  120  100  125  2.35  3.58
 3.5X35  24  116  94  117  145  120  155  3.29  5.01
 3.5X50  27  140  110  140  170  145  190  4.70  7.15
 3.5X70  31  170  140  176  210  175  235  6.58  10.01
 3.5X95  34  200  165  221  250  210  290  8.93  13.59
 3.5X120  38  225  185  258  285  240  330  11.28  17.16
 3.5X150  43  255  210  294  315  270  375  14.10  21.45
 3.5X185  46  285  235  339  355  300  435  17.39  26.46
 3.5X240  52  325  270  402  410  350  510  22.56  34.32
 3.5X300  57  370  305  461  460  390  590  28.20  42.90
 3.5X400  65  435  350  542  520  440  670  37.60  57.20
 3.5X500  73  481  405  624  580  480  750  47.00  71.50
 3.5X630  82  537  470  723  680  575  875  59.22  90.09
                   
                   

1.1 KV Three & Half CORE AL/COPPER COND,XLPE INSULATED As per IS:7098(Part-I)
Cross-sectional area (Sq MM)

ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
 3.5X25  25  95  80  99  120  100  125  2.35  3.58
 3.5X35  27  116  94  117  145  120  155  3.29  5.01
 3.5X50  30  140  110  140  170  145  190  4.70  7.15
 3.5X70  35  170  140  176  210  175  235  6.58  10.01
 3.5X95  38  200  165  221  250  210  290  8.93  13.59
 3.5X120  42  225  185  258  285  240  330  11.28  17.16
 3.5X150  46  255  210  294  315  270  375  14.10  21.45
 3.5X185  51  285  235  339  355  300  435  17.39  26.46
 3.5X240  56  325  270  402  410  350  510  22.56  34.32
 3.5X300  60  370  305  461  460  390  590  28.20  42.90
 3.5X400  71  435  350  542  520  440  670  37.60  57.20
 3.5X500  79  481  405  624  580  480  750  47.00  71.50
 3.5X630  88  537  470  723  680  575  875  59.22  90.09
 

1.1 KV Four CORE AL/COPPER COND,XLPE INSULATED  CABLES As per IS:7098 (Part-I)
Cross-sectional area (Sq MM)

UN-ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
4cX4  17  34  28  30  44  37  39  0.376  0.572
4cX 6  18  43  37  40  55  47  50  0.564  0.858
4cX 10  20  57  48  53  74  61  67  0.940  1.430
4cX16  20  78  61  70  94  78  85  1.50  2.29
4cX 25  24  95  80  99  120  100  125  2.35  3.58
4cX35  26  116  94  117  145  120  155  3.29  5.01
4cX 50  29  140  110  140  170  145  190  4.70  7.15
4cX70  34  170  140  176  210  175  235  6.58  10.01
4cX 95  37  200  165  221  250  210  290  8.93  13.59
4cX 120  41  225  185  258  285  240  330  11.28  17.16
4cX 150  45  255  210  294  315  270  375  14.10  21.45
4cX 185  50  285  235  339  355  300  435  17.39  26.46
4cX 240  56  325  270  402  410  350  510  22.56  34.32
4cX 300  63  370  305  461  460  390  590  28.20  42.90
4cX 400  70  435  350  542  520  440  670  37.60  57.20
4cX 500  79  481  405  624  580  480  750  47.00  71.50
4cX 630  88  537  470  723  680  575  875  59.22  90.09
                   

1.1 KV Four CORE AL/COPPER COND,XLPE INSULATED  CABLES As per IS:7098 (Part-I)
Cross-sectional area (Sq MM)

ARMOURED CABLE

Overall Diameter (mm)

Normal Current Rating in Amps

Short Circuit Current Rating for 1Sec.duration in K. Amps

Aluminums Conductor

Copper Conductor

Aluminums

Copper
Ground Duct Air Ground Duct Air
4cX4  18  34  28  30  44  37  39  0.376  0.572
4cX 6  19  43  37  40  55  47  50  0.564  0.858
4cX 10  21  57  48  53  74  61  67  0.940  1.430
4cX16  22  78  61  70  94  78  85  1.50  2.29
4cX 25  26  95  80  99  120  100  125  2.35  3.58
4cX35  28  116  94  117  145  120  155  3.29  5.01
4cX 50  32  140  110  140  170  145  190  4.70  7.15
4cX70  37  170  140  176  210  175  235  6.58  10.01
4cX 95  40  200  165  221  250  210  290  8.93  13.59
4cX 120  44  225  185  258  285  240  330  11.28  17.16
4cX 150  49  255  210  294  315  270  375  14.10  21.45
4cX 185  54  285  235  339  355  300  435  17.39  26.46
4cX 240  65  325  270  402  410  350  510  22.56  34.32
4cX 300  68  370  305  460  460  390  590  28.20  42.90
4cX 400  76  435  350  542  520  440  670  37.60  57.20
4cX 500  86  481  405  624  580  480  750  47.00  71.50
4cX 630  94  537  470  723  680  575  875  59.22  90.09

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200 Responses to XLPE Cable-Current Rating

  1. Syed Saif Ahmed's avatar Syed Saif Ahmed says:
    May 23, 2011 at 12:15 pm

    Dear Sir / Madam,
    Please send me the cable size selection chart for Low voltage & Medium voltage. I will be very great full to you.
    Regards
    Syed

    Reply
  2. Ramachandra laxman's avatar Ramachandra laxman says:
    July 5, 2011 at 6:16 pm

    Thank you for this cable selection chart. Thank u verymuch. Do u have any information about conductor,s DC current carrying capacity .Please help me sir, Thank u.

    Reply
  3. p.vadivel's avatar p.vadivel says:
    August 10, 2011 at 3:08 pm

    dear sir,
    ratinng cable size of 300kva to 450kva trasformer.

    Reply
  4. shafeeq's avatar shafeeq says:
    August 16, 2011 at 10:12 pm

    dear sir,
    thanks.can you please give details of selecting UPS and generators rating.

    Reply
  5. Ramchandra B Damle's avatar Ramchandra B Damle says:
    October 12, 2011 at 4:25 am

    Dear Sir

    Will you please furnish me short time ratings of HT XLPE insulated cables e. g. 10% for XXX Hrs., 20% for XXX Hrs. and so on ?

    Reply
  6. SHAMAUN HAKIM's avatar SHAMAUN HAKIM says:
    October 26, 2011 at 1:52 am

    Can a 10 guage XPLE insulated copper wire used as leads for oil immersed CTs withstand around 90 deg C continously in transformer oil? What is the compatability of XPLE wire with transformer oil? What is the specific density of XLPE insulation?

    Reply
  7. Gnana Reuben's avatar Gnana Reuben says:
    November 2, 2011 at 11:40 am

    Can we get the standard from which the XLPE current values are derived / referred.

    Reply
  8. paulson's avatar paulson says:
    November 25, 2011 at 11:09 am

    can you tell me the voltage drop calcultaion of 11KV XLPE cable around 600m long

    Reply
    • JIGNESH PARMAR's avatar Jignesh.Parmar says:
      November 27, 2011 at 3:51 pm

      Use Excel Base Program to Calculate LT-MV-HT Cable from “Electrical Tool” Page of This Blog

      (1) Cable Designing Program:

      DOWNLOAD:

      Calculate Voltage drop of Cable.
      Calculate Size of Cable.
      Calculate Current Capacity of Cable.

      Reply
      • paulson's avatar paulson says:
        November 30, 2011 at 6:40 am

        Mr Jignesh,

        what is the difference between MCCB,ACB and VCB..

        I heard that above 630A we should use ACB ,but MCCB’s are available till 1600A.

        So can you tell me from which rating we have to go for ACB and VCB

        Is there any difference in the operation of MCCB and ACB.

        Thanking you,
        Paulson

      • karuppanasamy's avatar karuppanasamy says:
        January 7, 2014 at 3:50 pm

        i am engaged in arecanut leaf plate manufacturing activity which need heaters with die of 8000 watts.what specification of power cable can i put.

      • Amit Thakur's avatar Amit Thakur says:
        November 20, 2015 at 10:02 am

        Dear Sir,

        i what to learn the HT cable sizing. how to calculate it . Can you help me. If you have any excel Sheet kindly shear with me.

      • Priya's avatar Priya says:
        March 20, 2017 at 8:16 am

        Dear Sir,

        Really very happy…Your Calculation your explanation are very nice and useful for us.

  9. krishan chand's avatar krishan chand says:
    December 8, 2011 at 1:49 pm

    please send details of
    1-cable size with current rating data
    2- cable gland size & type
    3- rating of contractor & over load relay

    Reply
    • JIGNESH PARMAR's avatar Jignesh.Parmar says:
      December 8, 2011 at 5:18 pm

      This Topic is already covered.Read Electrical Notes Carefully

      Reply
      • nirav shah's avatar nirav shah says:
        August 14, 2013 at 3:13 pm

        Dear Jignesh, I am nirav shah from hyderabad. i would like to know what is the difference between current carrying capacity for xlpe insulated single core copper flexible cables for AC and Dc applications. Benchmark being single core 240sqmm which can carry upto 550amps in AC application.

  10. Udaikiran's avatar Udaikiran says:
    January 18, 2012 at 7:51 am

    Dear Sir,

    Details furnished by you are excellent.Sir, i need to buy the unlock version .Did you published any books on cable sizing,busbar calculation, breaker designing etc?My maid id is udai_kiran1983@yahoo.com

    Reply
  11. ramkewal's avatar ramkewal says:
    January 29, 2012 at 7:06 pm

    sir, i read to this cable size and current rating chart it is very use full for us so i request u please send this chart in my Email
    RAMKEWAL

    Reply
  12. ramkewal's avatar ramkewal says:
    January 29, 2012 at 7:09 pm

    i will be hope full with this chart
    Thank you.
    RAMKEWAL

    Reply
  13. Ronald Mutambiranwa's avatar Ronald Mutambiranwa says:
    February 1, 2012 at 1:27 pm

    Dear Sir / Madam,
    Please send me the cable size selection chart for Low voltage & Medium voltage(single phase and three phase indicating amps each size can carry. I will be very great full to you

    Reply
  14. Babji Duvva's avatar Babji Duvva says:
    March 22, 2012 at 10:57 am

    can you please provid me for the current rating for 1C X 185 SQ MM copper cables

    Reply
  15. nmr's avatar nmr says:
    April 1, 2012 at 11:56 am

    11kv/433v TFP-1000 kva/500kva/750kva the fl currents on LT side are 1333.3/1000/666.6 amps. what is size of 4 core xlpe alluminium is used pl tell me.

    Reply
  16. vamsi's avatar vamsi says:
    August 22, 2012 at 7:17 am

    this chart about cables is nice but give us some information about OH cables, and underground cables .

    Reply
  17. d s negi's avatar d s negi says:
    October 5, 2012 at 9:22 am

    WHAT IS THE BIS – IS CODE FOR 11 KV CROSS ARMOURED CABLE

    Reply
  18. Azad Anupam's avatar Azad Anupam says:
    October 16, 2012 at 2:26 pm

    Very useful….

    Reply
  19. Mohammed's avatar Mohammed says:
    November 1, 2012 at 4:54 pm

    Dear Jignesh,

    Your cable selection table is very helpful. But i’ve a question to clarify? how do we determine the cable current capacity of cables running in parallel? for example if my breaker is rated at 1000A, what size of cable conductor should be terminating at the terminals per phase, can i terminate 2 x 1c x 400 per phase or how do we decide the conductor sizing? as i understand there is a derating factor of cables when connected in parallel? may be you can ellaborate further and may be send me details on the cable sizing formulation and other useful data on my email : manjarwalla@gmail.com

    Reply
    • JIGNESH PARMAR's avatar Jignesh.Parmar says:
      November 1, 2012 at 5:03 pm

      Use Equation
      % Voltage Drop:=(1.732 X (Full Load Current)X(RCosØ+j SinØ)XLengthX100) / Line Voltage X No of Run X 1000.
      Here No of Run cable is Either 1,2 or more in parallel.
      You can also use “Cable Design” sheet of the Excel Tool Page of this Blog

      Reply
      • Mohammed's avatar Mohammed says:
        November 1, 2012 at 5:55 pm

        Dear Jignesh,

        Thank you for your prompt reply. I’ve also gone through your cable design excel sheet,wonderful program. On the cable design program how do you determine the starting and running cos and sin thetha? do you have any thumb rule for calculating the cable runs in a faster way? for example if my full load current is 1000A as incomer or any feeder load connected to my panel. As from the program i’ve to input the the respective KW to attain nearest full load current before i can get the runs of cables?

  20. B.R.Suryawanshi's avatar B.R.Suryawanshi says:
    November 3, 2012 at 8:10 am

    Dear Sir,
    Plz.tel me this XLPE cables can we use 100% loading? for How much length cables are de rated?
    Thanks.

    Reply
    • JIGNESH PARMAR's avatar Jignesh.Parmar says:
      November 3, 2012 at 5:03 pm

      this Rating is as per Standard Cable Catalog and IS. Cable Rating never indicate derating factor. Because Derating Factor depends upon Your Application.
      It is depend upon Type of Laying Cable –
      =In Air,Land, at 0.500mt depth at 1 meter depth,
      =Air-Land Temperature,
      =in bundle,=In separate,Distance between two Cable, etc.
      If Cable Rating is 100 Amp It may be 80 Amp or 90 Amp or 100 Amp depend upon Laying of cable.

      Reply
  21. A. A. Mahadik's avatar A. A. Mahadik says:
    November 22, 2012 at 7:13 pm

    Pl. send me LT cable current carrying capacity charts

    Reply
    • JIGNESH PARMAR's avatar Jignesh.Parmar says:
      November 23, 2012 at 2:05 pm

      Already available on this Blog . Please Refer Post of “PVC Flexible Wire Rating”
      I have already Put Cable/Wire Rating Starting from 430V to 66KV (Earthed/Unearthed Cable)

      Reply
  22. lal bahadur chand's avatar lal bahadur chand says:
    December 19, 2012 at 7:35 pm

    Varry importent for me this. Site

    Reply
  23. shine's avatar shine says:
    February 26, 2013 at 12:23 pm

    Good work, its very useful

    Reply
  24. hariharan.v's avatar hariharan.v says:
    March 7, 2013 at 6:44 pm

    sir,if i have 7.5kw unit then how can i select cable for that unit with out using chart.give me that formula for me.

    Reply
  25. zahid's avatar zahid says:
    March 10, 2013 at 12:22 pm

    well done sir you have a great job and sacrifices for Electrical Engineering.

    Reply
  26. Hareesh R's avatar Hareesh R says:
    April 20, 2013 at 7:53 am

    Hi,
    I really appreciate your effort to share consolidated information..

    Reply
  27. sulaimant's avatar sulaimant says:
    May 3, 2013 at 6:33 pm

    dear
    sir/madem
    pleas send me cebel formula for given voltag and
    also send me cabel and amp tebal

    Reply
  28. Jayaprakash.N's avatar Jayaprakash.N says:
    May 22, 2013 at 4:34 pm

    It is very useful informations… Gr8

    Reply
  29. Ribhu Gaur's avatar Ribhu Gaur says:
    May 23, 2013 at 7:39 am

    what is the thumb rule for above calcualtions..? please share the formula for approximate current ratings in 1.1 kv XLPE cables .

    Reply
  30. kuruvilla's avatar kuruvilla says:
    June 26, 2013 at 9:38 am

    Mr. Jignesh, can you please tell me what size of cable is required for solar installation. My panel rating is Isc=8.5 A, Voc=36.5 V. I’m using two series panels in 3 arrays, basically an 2×3 system. Thanks. Length one way will be 30 feet from panels to inverter.

    Reply
  31. Nasir's avatar Nasir says:
    July 9, 2013 at 5:43 pm

    400 volt,528 amp and insulation xlpe ,cable size required

    Reply
  32. Unknown's avatar vinod pol says:
    August 1, 2013 at 10:08 am

    hiii sir, thanx for this information but sir pls tell me the formula or any thumb rule for calculating of cable/wire size as per given load…..

    Reply
  33. Abdul Guffar's avatar Abdul Guffar says:
    August 23, 2013 at 10:51 am

    Thank you for this cable selection chart. Do u have any information about conductor,s DC current carrying capacity .Please mail me sir, Thank u.

    Reply
  34. prabhakar's avatar prabhakar says:
    August 29, 2013 at 5:45 am

    sir
    can u tell me the formula how to calculate the cable sizes corresponding amps..

    Reply
  35. Unknown's avatar mintu kumar pandit says:
    September 22, 2013 at 8:15 am

    why use mastic tape for 11 kv cable joint,please tell me sir.

    Reply
  36. Unknown's avatar Mintu Kumar Pandit says:
    September 24, 2013 at 5:24 pm

    Dear sir,
    what is the function of cable fillers ? please reply.

    Reply
  37. Mintu Kumar Pandit's avatar Mintu Kumar Pandit says:
    September 24, 2013 at 7:18 pm

    sir ,
    difference between round shape cable and delta shape cable please me understand

    Reply
    • mintu kumar pandit's avatar mintu kumar pandit says:
      October 4, 2013 at 10:41 am

      whats type of 11kv spout ?

      Reply
      • Anees Mustafa's avatar Anees Mustafa says:
        October 4, 2013 at 1:18 pm

        electrical infrastructure construction Q&A for exp houseing scheme what are requrment of houesing scheme of all utlates and what are gape electrical serviese between water ,sewg,gas and other serviese in under ground

  38. krishnamurthy's avatar krishnamurthy says:
    November 2, 2013 at 2:11 pm

    How to measure currenraings of armed & unarmed cables

    Reply
    • krishnamurthy's avatar krishnamurthy says:
      November 8, 2013 at 3:33 pm

      Differance between kw,kvar and kva

      Reply
      • Anil Thomas's avatar Anil Thomas says:
        November 16, 2013 at 7:48 am

        I want to know that whats the current carrying capacity for 4 runs of 3.5 core 400 Sq.mm Al. armoured XLPE cable in ground . How it can be calculate. ( please send a copy of tables if any )

        which means if 3.5 core 400sq.mm cable carries 370 amps in ground and when it is 2 runs it will not be double of 370. it will less than double. how it will calculate ???

        Please give me a reply
        with regards
        By Anil

      • JIGNESH PARMAR's avatar Jignesh.Parmar says:
        November 16, 2013 at 5:10 pm

        You are mixing two different topic ..
        (1) If we laid cable in ground,air or trench it’s current capacity will be decrease due to surrounding temp.
        (2) If we laid cable in group / single it’s current capacity will be decrease those effect called “derating factor of cable..
        You find in Electrical Tool page.
        If we run two cable for same phase obviously it’s capacity would be double…

      • KRISHNAMURTHY's avatar KRISHNAMURTHY says:
        November 17, 2013 at 1:57 pm

        How to measure capacitance&inductance in A.P.Transco meters and send formula of KW&KVAR&KVA.

  39. KIRAN PATEL's avatar KIRAN PATEL says:
    November 13, 2013 at 11:11 pm

    KIRAN PATEL
    dear sir what is service factor in motor and which kind machine in use same motor

    Reply
  40. bj vijay's avatar bj vijay says:
    November 15, 2013 at 4:12 pm

    Hai …

    Reply
  41. John's avatar John says:
    November 18, 2013 at 10:02 am

    Dear Sir,

    My doubt might sound silly to you, but I just wanted to clarify it. From the given cable ampacity ratings in the tables above, how can we calculate the maximum power rating for the respective multi-core cables.

    Thank you.

    Reply
  42. Suresh Chaudhary's avatar Suresh Chaudhary says:
    November 19, 2013 at 1:35 pm

    Dear Jignesh,
    pl suggest me regarding cable rating across laying ground 700 running feet for 750A load bearing at resisdence building there jurk load AC. Pl give cable size.

    Regards,
    Suresh Chaudhary

    Reply
  43. bikram kaushik's avatar bikram kaushik says:
    November 20, 2013 at 6:57 pm

    there is no any power rating of cable.only current rating of cable are mentioned.power rating is concerned to the equipment.

    Reply
  44. Shruthi's avatar Shruthi says:
    November 27, 2013 at 7:08 am

    Dear Jignesh,
    Sir what’s the formula to select the cables sizes for the particular current ratings?

    Reply
  45. Masoud Bu-Arbyay's avatar Masoud Bu-Arbyay says:
    December 4, 2013 at 8:08 pm

    You did good , its very useful

    Reply
  46. mohamed's avatar mohamed says:
    December 10, 2013 at 7:58 pm

    dear jignesh how to calculate the busbar size in 630amps breaker 3ph ?

    Reply
  47. Manoj Patil's avatar Manoj Patil says:
    February 10, 2014 at 1:52 pm

    Dear Sir

    Thanks for this information. this is very usefull for us.

    Reply
  48. sunil's avatar sunil says:
    February 13, 2014 at 7:12 am

    Dear Sir,

    Can you explain that the current rating you have mentioned in Ground ,Air, or duct is quite opposite to what manufacture state in their product catalogue.

    regards

    Reply
  49. Perumalkonar's avatar Perumalkonar says:
    February 21, 2014 at 8:27 am

    how many runs of 3.5C 240 sq.mm al. conductor xlpe pvc insulted cables to be laid to supply to a circuit which is maximum current draw is 800 A.

    Reply
  50. shree raja's avatar shree raja says:
    February 21, 2014 at 2:00 pm

    Yes very use full.thank you.

    Reply
  51. venu's avatar venu says:
    February 23, 2014 at 12:01 pm

    Sir,

    please let me know the current carrying capacity of 3C*2.5 sqmm copper cable in air.

    Reply
  52. karan's avatar karan says:
    March 10, 2014 at 10:36 am

    sir,
    if i want to select power cable for 2o hp motor. and i am going to use 3 core alluminium cable.
    then what will be the cable size?

    Reply
  53. manoj singh's avatar manoj singh says:
    April 15, 2014 at 7:58 am

    sir,
    if i want to select 50sq cable for 11kv. and i am going to use 3 core cable.
    then what will be the cable size?

    Reply
    • Fetsum Asayehegn's avatar Fetsum Asayehegn says:
      April 16, 2014 at 9:32 am

      your table is very useful, thank you and I need the cable size of 22 kw, 3ph, 380volt for my deep well pump motor at a deep distance of 300 metrrs
      Thank you & best regards,
      Fetsum

      Reply
  54. PETER BIBIN M J's avatar PETER BIBIN M J says:
    July 23, 2014 at 5:38 am

    thanks for this great cable chart…

    Reply
  55. Fadi's avatar Fadi says:
    July 27, 2014 at 6:23 am

    Hi

    Can I know how many runs of single core 630 mm are required for a 1000 KVA transformer ?

    Reply
  56. Teshome's avatar Teshome says:
    August 29, 2014 at 3:14 pm

    Dear Sir;
    I would like to say thank you so much for the access you made open to get the size of power cables.
    Teshome, from Ethiopia

    Reply
  57. shadab uddin's avatar shadab uddin says:
    September 8, 2014 at 6:05 am

    Dear sir/ Madam
    Please send me the cable size selection chart & amps details

    Reply
  58. J.P.Nandaniya's avatar J.P.Nandaniya says:
    September 13, 2014 at 6:03 am

    Dear Sir,
    Kindly give me chart for motor hp kw flc relay contactor mccb current carring capacity for all and cu and gland size.

    Reply
  59. fawad's avatar fawad says:
    September 16, 2014 at 2:23 am

    hi…. i have find question about how to find current of 132kv,1200mm^2 cross sec area,in flat formation with 400 mm disc presnt btween them,,is there any formuala ,so guide me plzzzzz,thnkxxxx

    Reply
  60. satish's avatar satish says:
    September 19, 2014 at 10:56 am

    Hi — Here 40 kw load 3 ph 415 v and length is 1 km so kindly suggest me which size of aluminum
    cable to be laid in ground

    Reply
  61. Virendra Singh's avatar Virendra Singh says:
    September 20, 2014 at 1:24 am

    Hello, what 33 KV cable size should I select for a 2000 KW Load on LT side. Transformer is 2.5 MVA, 33/0.433 KV.

    Reply
  62. sunil kumar's avatar sunil kumar says:
    November 9, 2014 at 6:54 am

    बहुत अछछी जानकारी मिली।

    Reply
  63. Engineer Habeeb's avatar Engineer Habeeb says:
    December 9, 2014 at 12:32 pm

    You are such a wonderful Engineer, for the great opportunity you have given to people

    Reply
  64. nishantsharma111's avatar nishantsharma111 says:
    December 22, 2014 at 10:00 am

    UR NOTES IS SUCH WONDERFULL THANK U SO MUCH…

    Reply
  65. Swapnil Mohite's avatar Swapnil Mohite says:
    December 24, 2014 at 1:16 pm

    Dear Sir,

    will you please suggest me from which website i can download Excel Base Program to Calculate LT-MV-HT Cable from Electrical tools.

    Reply
  66. venkatesh's avatar venkatesh says:
    December 25, 2014 at 4:25 pm

    Sir Thanks For your Valuble Information,I want know the Formula for To Measure Current For Any cable Ex:1x16sq.mm,3x4sqmm,3×16 sqmm

    Reply
  67. Jamshed's avatar Jamshed says:
    January 5, 2015 at 7:49 am

    Sir Thanks For your Valuble Information,I want know the Formula for To Measure Current For Any cable Ex:1x16sq.mm,3x4sqmm,3×16 sqmm

    Reply
  68. SARTHAK's avatar SARTHAK says:
    January 9, 2015 at 9:21 am

    CAN YOU TELL ME WHEN WE TAKE A 51MM COOPER CABLE THEN THIS COOPER CABLE HOW MUCH TAKE A LOAD IN HP

    Reply
  69. ali's avatar ali says:
    February 9, 2015 at 10:23 am

    please can you tell me if total load is 140 Amp and length is 250 Meter. how much XLPE cable size and how much voltage drop. how i can calculate.

    Reply
  70. Siddhartha's avatar Siddhartha says:
    February 16, 2015 at 7:57 am

    please advice which minimum width of 3 core xlpe cable should used for 7 KM long transmission with connected load of 3000

    Reply
  71. RAM's avatar RAM says:
    February 17, 2015 at 5:59 pm

    Sir
    How much load can be layed on 1 kv line. Please give kv and load relation.

    Reply
  72. sanjay's avatar sanjay says:
    February 21, 2015 at 7:18 pm

    Sir
    what’s the advantage of using 4 core cable over 3.5 core cable ? And then, what chang
    Powar pf 1

    Reply
  73. Suresh's avatar Suresh says:
    March 15, 2015 at 6:15 am

    sir,
    Detail of Transformer primary & secondary testing please said me

    Reply
  74. Obk.'s avatar Obk. says:
    March 16, 2015 at 9:58 am

    Hello Sir.
    Can a 4C 150mm armoured cable sustain 595A or a total power of 398Kva? If not, what cable size would be ideal? I seek for expert advice. Thanks.

    Reply
  75. Karan's avatar Karan says:
    March 24, 2015 at 2:45 am

    Very good can I get this document through mail
    It’s very useful for me

    Reply
  76. Mohammad ladlay's avatar Mohammad ladlay says:
    March 26, 2015 at 6:09 am

    Thank you for this cable selection chart.
    Thank u verymuch.

    Reply
  77. mike's avatar mike says:
    March 27, 2015 at 7:24 am

    sir can you help me to size the cables for 5000A,3Phase,415Volts and the size of the cables for 2500KVA,415V, 3Phase diesel generator please help me for this

    Reply
  78. Ansh's avatar Ansh says:
    March 30, 2015 at 5:36 pm

    hello Sir,
    I’m Ansh from lucknow , i wanted to know when cable insulation test carried out on one end R-N other end of cables R-N are shorted or not & why….???

    Reply
  79. chauhan Devnarayan's avatar chauhan Devnarayan says:
    April 2, 2015 at 6:52 am

    Sir i
    i want to know how to select copper and aluminium busar on current capacity

    Reply
  80. shibu's avatar shibu says:
    April 22, 2015 at 7:27 am

    Hai
    can you please tell me how to make the GRC-Group rating cables,
    Regards
    Shibu

    Reply
  81. Harekrishna Parida's avatar Harekrishna Parida says:
    April 23, 2015 at 5:16 am

    Dear Sir,
    Kindly share What is the standard parameters to be maintained daily in a transformer for both dry type and oil type & What is dielectric strength?

    Reply
  82. Vishal Jayprakash Mistry's avatar Vishal Jayprakash Mistry says:
    April 24, 2015 at 3:01 pm

    Respected Sir, Thanks For Supporting For Electrical Engineer
    Sir i have Question to you sir
    Can you give suitable CU. & Al. Cable Size of different rating starter like DOL & Stardelta Starter from above cable chart.

    Reply
  83. SEBIN's avatar SEBIN says:
    April 27, 2015 at 4:49 am

    Dear sir,
    i want to know will there be any change inside the conductor when the cable inssulation viltage is .4/.6kV…

    Reply
  84. Kanchan's avatar Kanchan says:
    April 29, 2015 at 12:25 pm

    Dear Sir,
    Thanks for the useful chart… can u please guide me if these ratings are available in some standard or u have calculated the same using IEC 60287.
    Regards

    Reply
  85. Abhishek Kumar's avatar Abhishek Kumar says:
    May 2, 2015 at 3:06 pm

    Dear sir,
    Kindly give me how to test six nos of leads of motors to connect in delta.No identification.

    Reply
  86. jayakumar's avatar jayakumar says:
    May 9, 2015 at 6:19 am

    Dear sir,
    how to messring of current rate of contecter or cables

    Reply
  87. manjunath patil's avatar manjunath patil says:
    May 17, 2015 at 9:12 am

    tell me the standard formula to calculate current carrying capacity of cable

    Reply
  88. John Lima's avatar John Lima says:
    May 23, 2015 at 4:04 pm

    Sir,
    I require 4 core. rubberised cable for 200 HP 3phase motor 380/460 volts 226 amps if possible starter details.

    Regards.
    John

    Reply
  89. J Prasad's avatar J Prasad says:
    May 26, 2015 at 4:03 pm

    KINDLY SEND ME 33KV XLPE CABLE Current Rating Equivalent to Dog & panther conductor

    Reply
  90. NILABJA BHATTACHARYA's avatar NILABJA BHATTACHARYA says:
    June 1, 2015 at 12:09 pm

    Hello Sir,

    Please tell me how to calculate the voltage drop of a 4C, 25 Sq. mm. Armoured Aluminium XLPE 1.1kv rating cable for 80M length having current rating of 200A.

    If possible please involve the calculation also in reply.

    Reply
  91. omar's avatar omar says:
    June 2, 2015 at 8:39 am

    kindly if I need underground cable I will consider current carrying from above table & proceed or should be multiply with derating factors also . ??? can you help me.

    our site condition :-

    ground temp. 35C >>>> factor = 0.89 as per IEC standard tables .
    grouping factor >>>>>> 0.75 as per IEC standard tables .
    depth laying factor >>>> 1.0 as per IEC standard tables .
    soil thermal resistivity factor >>>> 1.17 as per IEC standard tables .

    Reply
  92. Sivakumar's avatar Sivakumar says:
    June 7, 2015 at 1:32 pm

    Super

    Reply
  93. Sivakumar's avatar Sivakumar says:
    June 7, 2015 at 1:36 pm

    Pls send me the LT &HT cable amps rating

    Reply
  94. Sivakumar's avatar Sivakumar says:
    June 8, 2015 at 5:03 am

    Electrical notes are good. Pls send the transformer yard drawings

    Reply
  95. Faizur Rehman's avatar Faizur Rehman says:
    June 9, 2015 at 7:36 am

    hI,
    Main Cut-Out: 250 Amps
    3 – Phases

    Red : 163 Amps Incoming Main Load from Qatar Govt. is 105 KW
    Yellow : 156 Amps Cable size 95 mm²
    Blue : 105 Amps

    Please let me know the Total Existing Load and alos tell me remedy to tripping off Problem.

    Reply
  96. Rajesh's avatar Rajesh says:
    June 16, 2015 at 7:10 am

    Its very useful data. Highly appreciate you efforts. Thanks

    Reply
  97. gouse's avatar gouse says:
    July 12, 2015 at 6:00 am

    Sir 3*400sqmm ug cable is laid in trench but cable termination is getting heating tell me reason

    Reply
  98. vanrajsinh's avatar vanrajsinh says:
    July 30, 2015 at 9:43 am

    Dear sir u help me to amp to cable size formula & table send me my email id

    Reply
  99. venkatesh's avatar venkatesh says:
    August 3, 2015 at 11:07 am

    Sir
    thanks for info
    can u provide any data regarding voltage drop by its length

    Reply
  100. azad's avatar azad says:
    August 5, 2015 at 8:58 am

    Either the termination is lose or the connected load is more than your estimated load

    Reply
  101. Edwin Iraola's avatar Edwin Iraola says:
    August 18, 2015 at 10:12 am

    SIr,

    Can you help about how much the maximum outer diameter of can cable can be run in 50 mm 110 mm 160 mm 250 mm dia duct

    Thank you

    Reply

  102. Pingback: Quora

  103. Jesper Moeller's avatar Jesper Moeller says:
    September 25, 2015 at 9:11 am

    Sir, why cant I find a Multi core cable 3.5 x 240 mm2 ?

    Reply
  104. K Soma Sekhar's avatar K Soma Sekhar says:
    October 17, 2015 at 4:14 am

    For 140A load (Gas Analyser Heat Tracing System), 3cx150 sq mm 1.1kV Armoured Aluminium cable shall be sufficient?? Cable to be laid in Air.

    Reply
  105. vineet kumar vishwakarma's avatar vineet kumar vishwakarma says:
    November 21, 2015 at 2:05 pm

    can you tell me , the size of fuse wire which can be used in 25 kva 3 phase distribution transformer 11/.4kv

    Reply
  106. prabu's avatar prabu says:
    December 7, 2015 at 2:37 am

    dear sir,

    how to calculate the maximum output amps for 4c x 240sqmm size?

    Reply
  107. Siva Prasad K's avatar Siva Prasad K says:
    December 22, 2015 at 9:28 am

    can anyone pls help me by sending the current carrying capacity of 3.5×35 Sq.mm aluminium cable ?

    Reply
  108. R K Patel's avatar R K Patel says:
    December 26, 2015 at 10:07 am

    Sir, request you to please send excel based calculation sheet for selection

    Reply
  109. kandavel's avatar kandavel says:
    January 2, 2016 at 8:45 am

    Dear Sir
    I would like to know the amperes details of 1c,600 SQMM COPPER CABLE…

    Reply
  110. ramjas's avatar ramjas says:
    January 6, 2016 at 11:47 am

    Dear sir ,

    cable more type example armored , unarmored , flexible , how calculate running meter weight.
    have any formula.

    Reply
  111. ramjas's avatar ramjas says:
    January 6, 2016 at 11:54 am

    Dear sir ,

    We have more type cable , armored , unarmored,flexible,instrumentation.
    how calculate running mtr weight.
    you have any formula.

    Reply
  112. Prashant Jadhav's avatar Prashant Jadhav says:
    January 13, 2016 at 8:58 am

    Dear sir,

    We have got new project. please let us know which cable use to 200KV UPS input

    Reply
  113. rk's avatar rk says:
    February 8, 2016 at 3:00 pm

    give details as below..

    which size of cables are use in underground network ?
    Total load is 200kw

    as early as possible

    thanks

    Reply
  114. M.B.Parthasarathy's avatar M.B.Parthasarathy says:
    February 13, 2016 at 10:33 am

    Why do electricity board keep R N Y B phase wiring in street post and not in R Y B N in order?

    Reply
  115. Junad ur Rehman's avatar Junad ur Rehman says:
    February 17, 2016 at 5:30 am

    Sir..!
    Can you tell me the cable size in mm..
    If i have to pass 500 amps of normal current and a surges of 100 amps could come to it..
    Voltage is 440 V .
    Cable length i need is 100 feet 1 side (single core) .

    Reply
  116. hari's avatar hari says:
    February 21, 2016 at 4:32 pm

    please provide the cable sizing for 1000kva DG set…we got information that -4 run of 240 sq mm cable ,single core for each phase is required.Is it like that?why?what is the calculation?

    Reply
  117. AJU's avatar AJU says:
    March 1, 2016 at 6:00 am

    Sir,

    How will calculate the cable size if load A and distance between load and source are known?

    Reply
  118. sanjeev dhiman's avatar sanjeev dhiman says:
    April 26, 2016 at 9:19 am

    sir plz define. cable size increses current also increase in small dia cables but when dia increase but current not increase with dia . define this

    Reply
  119. Navin's avatar Navin says:
    April 28, 2016 at 3:55 am

    Dear Sir kindly help in cable selection on AC side for a solar roof top system.
    1).10kw pv system for a two floried villa

    2).30 kw pv system for a 12 floried apartment.
    Both the above cases ACDB is mounted on the roof.

    Also please send me the cable selection chart…

    Reply
  120. Arunpuri's avatar Arunpuri says:
    May 11, 2016 at 6:22 am

    Thanks!!

    Reply
  121. Maulik's avatar Maulik says:
    June 8, 2016 at 12:53 pm

    Sir,

    We have wrongly purchased 3 core x 300 sq mm Aluminium armoured cable for main Incomer. What will be the solution to convert this cable in 3.5 Core x 300 Sq mm cable. Please help.

    Reply
  122. shiva s. h.'s avatar shiva s. h. says:
    July 1, 2016 at 1:48 pm

    sir, for 690 volt vfd application motor is it suitable for 1.1kv xlp cable or shall we required any special cable

    Reply
  123. rakesh_19781978@rediffmail.com's avatar rakesh_19781978@rediffmail.com says:
    July 30, 2016 at 8:05 am

    sir,
    Please tell me if 2x3x400 sqmm XLPE cable maximum current carrying capacity will be same for 11kv,33kv and 66kv voltage level?
    What is the maximum current carrying capacity?

    Reply
  124. rakesh_19781978@rediffmail.com's avatar rakesh_19781978@rediffmail.com says:
    July 30, 2016 at 8:41 am

    sir,
    Please tell me if 2x3x400 sqmm XLPE cable maximum current carrying capacity is same for 11KV,33KV,66KV?
    what is the max current carrying capacity for 4km cable?

    Reply
  125. anil's avatar anil says:
    August 10, 2016 at 8:39 am

    Thanks for providing such a list.
    May I know the actual difference between LT & HT?
    And what is the standard of choosing the LT power cable?

    Reply
  126. Mohd Ahmad's avatar Mohd Ahmad says:
    August 20, 2016 at 5:42 am

    thanks for its

    Reply
  127. Nitesh's avatar Nitesh says:
    August 22, 2016 at 4:21 am

    10sqmm×4core xlpe ug cable is ideal for a three floor building with total capacity of 15kilowatt?

    Reply
  128. Chris's avatar Chris says:
    September 11, 2016 at 12:41 pm

    This is very informative. Please let me also have table for xlpe cable ratings at 11kv.

    Reply
  129. Sushil's avatar Sushil says:
    October 24, 2016 at 6:31 am

    In Your Electrical notes ( Rev 5,page 10), Thumb rule for cable current capacity says 4 times of cable size, 4 x 2.5 sq.mm = 9Amp. If I am not wrong then 2.5sq.mm can carry approx 22Amp
    Can you please explain the basis of this thumb rule?

    Reply
  130. sukdeb chakraborty's avatar sukdeb chakraborty says:
    January 4, 2017 at 10:45 am

    I need cable glend size chart as per cable size
    Thank you

    Reply
  131. kishorv1kishor's avatar kishorv1kishor says:
    February 1, 2017 at 7:38 am

    Dear sir.
    I am working as Sr. section Engineer in Western Railway zone of Indian Railway.I have to scrutinise technically all material for traction distribution(Electrical branch) which is purchased by Railway.During Technically scrutiny I am facing a problem regarding type test certificate provided by firm for IS 7098 part II(2011)or part-I(1988).How can I considered category of cable i.e. 01, C1 or C2

    Reply
  132. papadopoulos Thanasis's avatar papadopoulos Thanasis says:
    February 18, 2017 at 5:26 am

    please I want to know what cable diameter I can use for one motor 450 volt 3 ph 60 hz 237 A in one distance 295 meter , the cable passing from pipe with other cable together.

    Thanks

    Reply
  133. Md. Keafayet Ullah's avatar Md. Keafayet Ullah says:
    April 18, 2017 at 6:33 pm

    How can I use cable size for 440 kW load? Please suggest Me?

    Reply
  134. NIDHI BHUSHAN's avatar NIDHI BHUSHAN says:
    May 2, 2017 at 12:12 pm

    how to select HT cables ?

    Reply
  135. Ravikant Goswami's avatar Ravikant Goswami says:
    May 4, 2017 at 4:33 am

    2R*3.5C*240sqmm XLPE, Aluminium cable current carriynig capacity for 630Amp Incomer Feeder panel?

    Reply
  136. hemant kumar's avatar hemant kumar says:
    May 6, 2017 at 11:20 am

    please i want to note chemical electrical earthing and were use & its advantages anther earthing system , how many cost of instalation of one chemical earthing

    Reply
  137. Rajesh Thapa's avatar Rajesh Thapa says:
    May 17, 2017 at 2:13 pm

    Can any one tell / explain the purpose of using 1.0 kV grade and 1.1 kV grade rating of PVC/XLPE insulated cable for low voltage since I am confused with it as some says 1.0 kV n some 1.1 kV. Logically how do we calculate? or it is differ from country to country?

    Reply
  138. Bornfree Kalunga's avatar Bornfree Kalunga says:
    June 3, 2017 at 9:02 pm

    Kindly send me these charts for cable selection , i will highly appreciate.

    Reply
  139. Bornfree Kalunga's avatar Bornfree Kalunga says:
    June 3, 2017 at 9:11 pm

    Kindly send me the charts for the cable selection, i will highly appreciate.

    Reply
  140. floyd's avatar floyd says:
    June 15, 2017 at 6:33 am

    Hi Jignesh, I’d like to ask for your permission to reproduce two of your Tables in my blog as I’d need them for my personal quick reference. Am currently working on a cable installation for a raw water pump. Thanks in advance.

    Reply
  141. Gautam Ramdas's avatar Gautam Ramdas says:
    September 26, 2017 at 8:00 am

    Hi Sir,
    I want cable joint selection chart because I check its different catalogue number for every manufacturer, so is there any standard chart for it. Please if you have send me on my email id.
    Thank you!

    Reply
  142. Lennox's avatar Lennox says:
    September 26, 2017 at 2:48 pm

    Very well detailed would like to have reference to a chart when paralleling cables

    Reply
  143. Madhukarreddy's avatar Madhukarreddy says:
    October 6, 2017 at 5:12 pm

    Good massage

    Reply
  144. Hamsananthan's avatar Hamsananthan says:
    November 26, 2017 at 6:56 am

    What is Laminar insulation on Medium voltage cables, loss on Laminar insulation

    Reply

  145. Pingback: Diameter of 1100 Volts Grade XLPE, Insulated Cable (IS-7098- Part- I)

  146. Sachin's avatar Sachin says:
    December 12, 2017 at 7:09 am

    16sqmm 1100v aluminum armored xlpe cable mai.kitna hp ka motor lode de .

    Reply
  147. Brijesh kumar's avatar Brijesh kumar says:
    February 25, 2018 at 12:23 am

    Sir,
    For 100 amp load and 150 MTR distance . Single phase .. how many sq mm copper cable required..

    Reply
  148. harsh panchal's avatar harsh panchal says:
    March 10, 2018 at 5:52 am

    Thank you so much sir your information is very useful..

    Reply
  149. Eng. Abdolgabar Ahmed Mahmood's avatar Eng. Abdolgabar Ahmed Mahmood says:
    April 15, 2018 at 9:40 am

    Dear Sir .
    Please send me the cable size selection chart for Low voltage & Medium voltage(pdf). I will be very great full to you.
    Regards.
    Eng. Abdolgabar Ahmed

    Reply
  150. Bishnu Chapagai's avatar Bishnu Chapagai says:
    May 24, 2018 at 9:17 am

    We have 2200 kVA 11/0.415 kV transformer. What would be the proper cable size at 11 kV Side ? is it simply by current rating or we need to take 2 to 3 times..plz clarify..

    Reply
  151. vishal's avatar vishal says:
    August 18, 2018 at 9:02 am

    hello,
    am planning to set up a factory where i will need load for my machines upto 130 hp. can some one suggest what copper armour cable should be used??

    Reply
  152. Shubham mishra's avatar Shubham mishra says:
    April 21, 2019 at 1:04 pm

    Good evening sir,
    Will you please send the 1.1kv 3core armoured xlpe cable current rating and. Is there any thumb rule(genral way) for calculating the current capacity (approximate) of the cable at site.(xlpe/pvc/pilca, 1c/2c/3c/3.5c/4c, copper/aluminum).

    Reply
  153. Shashi Vaidya's avatar Shashi Vaidya says:
    July 14, 2019 at 6:55 am

    hello

    can you guide Multi core cable Raw material calculation formula

    Reply
  154. Akinbode Josiah's avatar Akinbode Josiah says:
    January 15, 2020 at 12:09 pm

    Sir, please what is load capacity can 11kv aluminium xlpe power cable can carry

    Reply
  155. SAMIR PRIYAVADAN's avatar SAMIR PRIYAVADAN says:
    September 11, 2020 at 3:30 pm

    Sir I have confused all time in 0ne terms in 3.5*C in any cable amp rating are given per phase

    Reply
  156. dharmesh sapra's avatar dharmesh sapra says:
    February 3, 2021 at 10:55 am

    hi
    How to calculate derating factor. Give its formula

    Reply
  157. shekhar's avatar shekhar says:
    November 9, 2022 at 12:21 pm

    sir what does mean 1.1/kv Ac, 1core, 2run/phase-70 sq mm copper , xlpe, unarmoured cable.

    Reply

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