Electrical. Q&A

Collection of  Electrical Questions and Answers:

Electrical Question and Answers Part-1

Electrical Question and Answers Part-2

Electrical Question and Answers Part-3

119 Responses to Electrical. Q&A

  1. Pranav Jani's avatar Pranav Jani says:
    April 29, 2011 at 11:49 am

    Hi Jignesh,

    first of all, many many thanks to organise such a informative contents of electrical engineering. I appreciate this a lot. I have gone through many websites but didnt found so much useful information which I found on your website..brave effort.

    My electrical background is not so fundamental so would like to ask u a question regarding underground cabling of medium voltage cables for pv projects.

    I m looking for indian standards of medium voltage and low voltage cable specification for mega watt pv project.

    Will u pls guide me on this?

    Thank you.

    kind regards,
    Pranav

    Reply
  2. G.R.Prasad's avatar G.R.Prasad says:
    May 18, 2011 at 5:47 am

    What is the minimum clearence required around the neutral CT used for REF protection in 415V system.

    Reply
  3. Senthilkumar's avatar Senthilkumar says:
    December 20, 2011 at 3:01 pm

    please give details about SC rating design details for MDB and SMDB bus bars

    Reply
  4. nalini's avatar nalini says:
    December 30, 2011 at 5:23 pm

    nice question and answers sir,its very good…

    Reply
  5. vishwa murthy's avatar vishwa murthy says:
    January 26, 2012 at 5:35 am

    Dear Jignesh ji,

    I want to know how to calculate the string efficiency, can you please send/post the details…it will be most helpful for me.

    Reply
  6. Gnana Reuben's avatar Gnana Reuben says:
    February 3, 2012 at 9:09 am

    Dear Jigneshji

    Thnaks a lot for the Current ratings, Gland Chart and Q&A Part 1 thru 3

    Reply
  7. Madhurjya's avatar Madhurjya says:
    February 13, 2012 at 4:46 pm

    State whether a lamp rated for 230 V, 60 W can be used for both a.c & d.c supply. Give the reasons to your answers.

    Reply
  8. selvanayagam.a's avatar selvanayagam.a says:
    February 14, 2012 at 5:20 am

    hai sir.your Q/A everything useful.but how down load for pdf that about explain me

    Reply
  9. Adil's avatar Adil says:
    February 25, 2012 at 11:36 am

    Thank u and please keep going

    Very good job

    Reply
  10. Tshwarelo's avatar Tshwarelo says:
    May 30, 2012 at 8:38 am

    I enjoyed data that i got here.

    Reply
  11. Jones's avatar Jones says:
    June 9, 2012 at 5:32 pm

    Its really awesome,

    Reply
  12. kuppuraj's avatar kuppuraj says:
    June 21, 2012 at 5:20 am

    thank you sir…………………..!

    Reply
  13. NEHA GETHE's avatar NEHA GETHE says:
    July 12, 2012 at 7:41 am

    its 2 gud sir…..

    Reply
  14. kandasamy's avatar kandasamy says:
    August 18, 2012 at 10:17 am

    very very useful site

    Reply
  15. neeraj upadhyay's avatar neeraj upadhyay says:
    January 2, 2013 at 8:53 am

    dear jignesh sir,
    i want to know that is there any chances of load on energy meter if indivisual neutral is not provide?

    Reply
  16. neeraj upadhyay's avatar neeraj upadhyay says:
    January 2, 2013 at 8:55 am

    how to calculate the current of a transformer?

    Reply
  17. elias's avatar elias says:
    March 8, 2013 at 7:57 am

    i like ur page thanks a lot cause i imrove my knowledge. thanks a lot.

    Reply
  18. Pravin mali's avatar Pravin mali says:
    April 10, 2013 at 6:05 pm

    Nice site.thanks sir.

    Reply
  19. Eneyo Duke's avatar Eneyo Duke says:
    July 11, 2013 at 7:30 am

    Please is DOL applicable to lamp or only motor?

    Reply
  20. Unknown's avatar Watch Dogs Ps3 says:
    August 5, 2013 at 10:30 am

    I’m impressed, I must say. Seldom do I come across a blog that’s equally educative and amusing, and let me tell you, you have
    hit the nail on the head. The issue is something too few people are speaking intelligently about.

    I am very happy I found this in my search for something concerning this.

    Reply
  21. m.balagurunathan's avatar m.balagurunathan says:
    August 20, 2013 at 7:36 am

    Differences between providing the MCC with and without the relays.

    Reply
  22. Mukesh kumar's avatar Mukesh kumar says:
    October 2, 2013 at 2:56 am

    Electrical

    Reply
  23. john's avatar john says:
    October 5, 2013 at 1:39 pm

    2. A final circuit consists of six heaters connected in parallel each having a resistance of 150Ω. Find (i) the total resistance of the circuit (ii) the current through each resistor if the supply voltage is 600 V.

    Reply
  24. parikshit gorai's avatar parikshit gorai says:
    October 7, 2013 at 1:44 pm

    thanks for your valuable notes regarding cable trays.

    Reply
  25. Francis lungu's avatar Francis lungu says:
    October 23, 2013 at 4:16 am

    what is maximum mega ohms on 11kv 3core cable

    Reply
  26. sureshbabu's avatar sureshbabu says:
    November 5, 2013 at 10:21 am

    good evening sir, what is genarators check list and genaral maitanance

    Reply
  27. Appeagyei's avatar Appeagyei says:
    November 17, 2013 at 11:41 am

    Hi Engineer Jignesh,

    I know loss of neutral on a 3 phase system causes voltage on phase with less load to rise and that of the phase with high load to fall. please explain how and why this happens

    Thank you

    Reply
    • girishpcrGIRISH's avatar girishpcrGIRISH says:
      November 30, 2013 at 10:29 pm

      The absence of Neutral will cause the total voltage to rise upto 380V between 2 phases. So as per voltage dividing rule it acts as a serious combination of two parallel branches if without earth or neutral in between. Hence the serial branch which has more LOADS ( means effective resistance low because parallel connection ) will hae less voltage across it. Remember current is same.

      Reply
  28. Danish's avatar Danish says:
    December 18, 2013 at 10:42 am

    hi jignesh
    can you help me out regarding , what we have to see or note the important points when we are reading the specification for the electrical equipment eg ..transformer, ups , fire alarm ,cctv, acess control , hv switchgear , busbar ,mdb ,smdb, etc can you please help me out on this
    regards
    and keep going

    Reply
  29. RamKumar's avatar RamKumar says:
    December 25, 2013 at 2:41 pm

    sir, How to do Hi-pot test (DC)

    Reply
  30. Vinoth Kumar's avatar Vinoth Kumar says:
    January 15, 2014 at 1:59 pm

    Thank You very much for this collection sir.. It helped me in my career.

    Reply
  31. weljoe's avatar weljoe says:
    January 26, 2014 at 9:03 am

    Jignesh,
    What is the acceptance resistance of low voltage cables?

    Reply
  32. vidya's avatar vidya says:
    February 2, 2014 at 8:14 am

    Its a very good explanation..very clean nd clear. .soo great..thaank uu sir.

    Reply
  33. Akif Qadeer's avatar Akif Qadeer says:
    February 22, 2014 at 2:58 pm

    How to choose Accuracy class of CT?
    Lets say Meter is of 0.5S or 0.5 accuracy!!

    Reply
  34. bramhanand's avatar bramhanand says:
    February 22, 2014 at 3:23 pm

    sir i want to know about the dynamic impedance of ht motor at the time of start

    Reply
  35. Saiju Joseph's avatar Saiju Joseph says:
    March 2, 2014 at 4:42 am

    Dear Jignesh.Parmar,

    How i calculate capacitor bank breaker (ampere) capacity ?..example 80kvar capacitor if i connect in MDB,

    Reply
  36. Vishnu G's avatar Vishnu G says:
    March 5, 2014 at 7:06 am

    I wants to know about different ferrules and its meaninga

    Reply
  37. P M Pavan Kumar's avatar P M Pavan Kumar says:
    March 18, 2014 at 12:12 pm

    Dear Sir,
    When we connect the capacitor bank to the motor, will it draw current continuously or not? Please reply.

    Reply
  38. Hlonie's avatar Hlonie says:
    March 20, 2014 at 8:35 am

    What causes inductance in a circuit

    Reply
  39. c.b singh's avatar c.b singh says:
    April 3, 2014 at 12:05 pm

    hello sir
    i have a question that if i have a sub station with a transformer capacity 5MVA i have to erect 3 feeder of 18 to 20 Km each then how can i select size of conductor. these feeder are for rural areas

    Reply
  40. Amrit Kumar Mohanta's avatar Amrit Kumar Mohanta says:
    April 13, 2014 at 5:04 pm

    Hello Sir,
    My question is regarding on power flow analysis. I want to know that, what is the X/R ratio of Grid. It is require for simulating in ETAP

    Reply
  41. Pankaj tiwari.k's avatar Pankaj tiwari.k says:
    April 22, 2014 at 3:36 pm

    Why motor ratings are in h.p not in kw?

    Reply
  42. tony's avatar tony says:
    June 10, 2014 at 2:43 pm

    hae,i acknowledge the good work on this website..l am an electrical engineering graduate at diploma level however the job market is flooded.i would like to pursue plc programming studies to add value to my carreer path…at what degree will it enhance my chances in the job market?

    Reply
  43. MOHAMED HAROON's avatar MOHAMED HAROON says:
    December 2, 2014 at 9:00 am

    who is best electrical conduit for lighting and socket

    A) Rigid Non Metallic Conduit (PVC)
    B)Rigid Metal Conduit (RMC) / Rigid Steel Conduit (RSC)
    C)Intermediate Metal Conduit (IMC)
    D) Galvanized Rigid Conduit (GRC)
    E)Electrical Metal Tubing (EMT)
    F) Flexible Metal Conduit (FMC)

    Reply
  44. Bassey Friday's avatar Bassey Friday says:
    December 8, 2014 at 6:46 am

    How to calculate correct cable size for a 37kw ac motor and the correct gen for. A factory with 950kw load

    Reply
  45. Tarun's avatar Tarun says:
    February 3, 2015 at 7:06 am

    I have a project to design a food court in kundali. in this there are two nos. of coffee shop, one nos. KFC outlet & 12 nos of small FNB outlets of 600 sq.ft. area.
    I have to prepare a electrical load sheet.i’m confused how much load should i take, my senior suggest take 100kW for KFC and 40kW for coffee shop & 20kW for rest of the outlets.
    But it seems too much load we have taken.
    & how much diversity we would take?
    Please help sir what to do.

    Reply
  46. Danish Hayat's avatar Danish Hayat says:
    February 5, 2015 at 10:58 am

    Dear Sir
    Could you plz help me out regarding the diversity factors to be considered for different panels . Do i have to consider diversity factor for all MDBs & finally diversity factor in main LT panel . Is there any code which says about diversity factors at different levels of distribution.
    Thanks

    Reply
  47. Pradeep Khandagale's avatar Pradeep Khandagale says:
    February 12, 2015 at 1:46 am

    Good morning ,
    Jiganesh sir,
    I want Indain standaras; & NEC Rules For E.H.V. Transmission line & EHV substation up to 400 kv.
    Thank you.
    Regarda,
    Pradeep.

    Reply
  48. saumya's avatar saumya says:
    February 13, 2015 at 9:26 am

    how can i calculate current carrying capacity of copper wire

    Reply
  49. MD Mutaleb hossain's avatar MD Mutaleb hossain says:
    March 4, 2015 at 6:19 am

    Hi sir, I am so happy to know your side…I want to know how a tube-light work.and it circuit diagram…estimation and cost.

    Reply
  50. suresh's avatar suresh says:
    March 19, 2015 at 7:16 am

    Hi Sir,
    I have charged 132 KV S/C Line 35.9 Kms in length . There was no terminal equipment like LAs & CVT at receiving end . This line remained charged for more than a month and then whole assembly of R_phase got punctured further lead to snapping of conductor at T8 near to receiving end. Kindly let me know whether the above breakdown was due to Ferranti effect of the line or weak insulation of Disc insulators or high earthing resistance of line ?

    Reply
  51. Ravi kant's avatar Ravi kant says:
    March 28, 2015 at 12:46 pm

    nice Q.

    Reply
  52. tanzeel's avatar tanzeel says:
    March 31, 2015 at 12:12 pm

    Hello everyone. Can any body tells me that RCBO C32 and R30 100mA, in this RCBO, what is meant by C in C32 and R in R30??

    Reply
  53. prabhat's avatar prabhat says:
    April 3, 2015 at 6:29 am

    very good info

    Reply
  54. Shreyas's avatar Shreyas says:
    April 9, 2015 at 11:16 am

    caterpillar 1000kva .800 kW ..stops automatically in between what may be reason ?

    Reply
  55. SURESH KUMAR J's avatar SURESH KUMAR J says:
    April 17, 2015 at 4:04 pm

    All electrical q&a sending for my mail ID

    Reply
  56. Sameer Bhoi's avatar Sameer Bhoi says:
    May 7, 2015 at 1:42 pm

    i never seen this type of website to learn about electrical.

    Reply
  57. Sandeep's avatar Sandeep says:
    May 13, 2015 at 3:53 pm

    Our vertical flange mount motor with centrifugal pump driven motor capacity 70 KW 3 ph Induction motor become vibration when motor run through VFD.

    Vibration occur only 1200 RPM to 1350 RPM DE-NDE V- 5.9 mm/s H- 7.9 mm/s A- 1.2mm/s. If motor run at full load then vibration is normal below 2.5 mm/s.

    What is actually problem. i am also take vibration at no-load also but same problem.

    I am also changed motor at foundation but same problem observed.

    Please give me technically ans….

    Sandeep Dalal
    09536908464

    Reply
  58. Hothifah's avatar Hothifah says:
    May 26, 2015 at 10:59 am

    I am an electrical engineer and I am still fresh. I am studying the Steam turbine Generator and I have an STG connected to a grid (60 Hz,34.5 KV), the output STG power is 26 MW I need to increase it to 31.2 MW. I need to focus into generator side not prime mover. The question,

    1- What is the primary step I should do ?
    2- What graph should I study (Capability curve, v/f .. etc) ?
    3- How can I know what is the maximum Active power ?
    4- What is the logic and control that prevent the generator to feed more ?

    I appreciate your help..

    Regards,

    Reply
  59. question's avatar question says:
    May 27, 2015 at 4:45 pm

    question:estimate the material required for cts wiring system used in a hall measuring 30’*60’and height 10’and the reuirements are as follows: no.of lights points=32.no.of fan points=6.no.of 2pin plug sockets=2

    Reply
  60. HARSHAD KOLI's avatar HARSHAD KOLI says:
    June 22, 2015 at 8:44 pm

    GREAT support

    Reply
  61. Nikhil's avatar Nikhil says:
    July 8, 2015 at 1:53 am

    Thank q for providing such a website for electrical information

    Reply
  62. Hardik Kotadiya's avatar Hardik Kotadiya says:
    July 18, 2015 at 8:19 am

    Good question nd answer

    Reply
  63. parthasarathy k's avatar parthasarathy k says:
    July 29, 2015 at 12:29 pm

    Dear sir,

    what will happen if we are not done earthing or disconnect earthing the switch gear (33kv switchboard indoor type)all CT & PT Star points are connected to same earth bus

    Reply
  64. eihtwe's avatar eihtwe says:
    August 2, 2015 at 5:59 pm

    Thanks a lot for your sharing.Your notes are very effective to me.

    Reply
  65. Vijay Yadav's avatar Vijay Yadav says:
    September 9, 2015 at 2:13 pm

    Thangs….
    . Due to this improve my basics

    Reply
  66. Tapas Banerjee's avatar Tapas Banerjee says:
    September 13, 2015 at 7:16 am

    Thanks Boss. Tapas Banerjee

    Reply
  67. sri alex's avatar sri alex says:
    October 13, 2015 at 12:01 pm

    what is meant by safety factor in electrical??
    how can calculate the safety factor??
    plzz answer me fast..

    regards..

    Reply
  68. Faheem's avatar Faheem says:
    October 13, 2015 at 2:17 pm

    I have a chiller which is consuming 1.2 MW of power daily and voltage is 4.160V.How to calculate it in kWh?

    Reply
  69. Emil John Candelario's avatar Emil John Candelario says:
    November 2, 2015 at 1:22 am

    Hi Jignesh. We are procuring a submersible pump together with a separate terminal box and the area classification for the equipment is Zone 1 Group IIA T1. Our vendor is suggesting that a T6 rated equipment is superior to a T1 rated equipment. I have seen the T-class table for explosive atmospheres and there is a big difference between the two. Is our vendor correct in saying that a T6 rated equipment is superior to a T1 rated equipment? If possible, can you also please send to me the regulation, preferably IEC, which shows how to interpret the T-class for such an equipment. Thank you so much and your help is very much appreciated.

    Reply
  70. Hariprasad's avatar Hariprasad says:
    November 7, 2015 at 7:29 am

    what will happen If u give a same body earthing for AC and DC equipment’s?

    Reply
    • Girish R Pillai's avatar Girish R Pillai says:
      November 15, 2015 at 5:59 pm

      Nothing will happen if you make sure that the earth is a perfect one with the lowest of the lowest ohms. Make 3 pits minimum and interconnect in delta and bring minimum 2 earth conductors from diagonal points of each equipment.

      Reply
  71. Thangavelu Kumnar's avatar Thangavelu Kumnar says:
    November 15, 2015 at 8:01 am

    In which base REF protection act as earth fault protection explain please

    Reply
    • Girish R Pillai's avatar Girish R Pillai says:
      November 15, 2015 at 6:10 pm

      R.E.F acts for faults in between the incoming side and outgoing side CTs of a transformer. This region can’t be protected by the C.Ts alone, as they may not get any fault currents in such a situation. Hence the protection circuit is made up with another logic involves the unbalanced currents.

      Reply
  72. Thamizh's avatar Thamizh says:
    November 28, 2015 at 6:10 am

    Hello..sir. what is the procedure to remove moisture from HT panel.

    Reply
  73. Chandrakant Ghan's avatar Chandrakant Ghan says:
    February 12, 2016 at 9:19 am

    Dear Mr.Parmar,

    Many many thanks for preparinfsuch beutiful and useful information for Electrical engineers .Many webistes just give supoerficila information and then ask your persional details for obvious reasons (selling it).

    My sincere tahnks to you and keep it on.

    Chandrakant Ghan

    Reply
  74. electricalyadav1992's avatar electricalyadav1992 says:
    March 1, 2016 at 6:54 am

    Dear sir
    In detailed lecture you have provided many useful information please advice whether any specific calculations or specified rules to be followed for calculating the length of gap in for multi gap (series gap) lightning arresters

    Reply
  75. nikunj's avatar nikunj says:
    March 14, 2016 at 9:08 am

    sir please send me your e mail id..

    Reply
  76. Manish kumar Chaudhary's avatar Manish kumar Chaudhary says:
    April 21, 2016 at 12:25 pm

    what’s kelvin’s law

    Reply
  77. Ameen Basha's avatar Ameen Basha says:
    May 2, 2016 at 12:41 pm

    In my project, there is a 132kV Shunt Reactor. what voltage grade cable will be used for solid earhting the neutral.kindly advice.

    Reply
  78. pradeep's avatar pradeep says:
    July 15, 2016 at 11:10 am

    Electrical related

    Reply
  79. shirish's avatar shirish says:
    July 29, 2016 at 5:19 am

    dear sir
    i want to know the maximum distance in meters illuminated by high mast lights on road.
    want to illuminate around 8 km zigzag road. even maximum area illuminated by one high mast light will also do.

    Reply
  80. Honorato Acebedo's avatar Honorato Acebedo says:
    August 1, 2016 at 7:10 am

    Dear Sir Parmat, i have 3.3kv genset can i add a low voltage generator using step up transformer? can i synchronize it to 3.3kv.
    waiting for your reply thanks….

    Reply
  81. Ravi.s's avatar Ravi.s says:
    September 18, 2016 at 1:55 pm

    what is the purpose of using Resistor+Capacitor unit (RC circuit)?.
    Need surge suppressor(RC unit) to prevent ‘very fast Transient voltage’ during operation of Switchgear.

    Reply
  82. Prashant rajak's avatar Prashant rajak says:
    September 24, 2016 at 1:55 am

    We are having 220 V DC battery bank system for supplying control supply to our 220 KV Switch yard. we are facing the problem +ve to ground fault in our Battery bank Dc system. can any one having idea how to find the DC leakage without switching OFF the connected load.

    Reply
  83. Vinayak Waghmare's avatar Vinayak Waghmare says:
    October 5, 2016 at 4:27 am

    The Information you added its very useful….Thank you so much….

    Reply
  84. Ahmed Eissa's avatar Ahmed Eissa says:
    October 10, 2016 at 11:10 pm

    If I have MAN diesel generator 800 kva standby and I need to test sudden load with load what is the maximum load according the ISO?

    Reply
  85. venkatesh.b's avatar venkatesh.b says:
    October 25, 2016 at 12:29 pm

    Give objective type questions about machines

    Reply
  86. sunil's avatar sunil says:
    November 3, 2016 at 5:28 am

    Hi sir
    First of all, many many thanks to organize such a informative contents of electrical engineering. I appreciate this a lot.
    i want to contact with you so need a your contact number

    Thanking sir
    SUNIL MEHTRE
    +919481189609 My whats app no
    +917030931925 contact no

    Reply
  87. safwan k's avatar safwan k says:
    November 15, 2016 at 11:33 am

    hello sir, can u give the details of leackage current limit, when doing the 13.8 kv cable hv
    testing

    Reply
  88. safwan k's avatar safwan k says:
    November 15, 2016 at 11:37 am

    dear sir…
    can you give the details of leakage current limit for 13.8 kv cable hv testing.

    Reply
  89. SHREEJIB GOSWAMI's avatar SHREEJIB GOSWAMI says:
    December 2, 2016 at 11:17 am

    Very nice.
    I would like to ask a question.
    A 132/33 kv substation is feeding power from two different sources and the sources are 1) 220/132 kv substation at a distance of 5 kms 2) A generating station at a distance of 36 kms.
    Now the 132/33 kv substation has a 33 kv feeder of fluctuating load( 20 amps to 300 amps).
    The ampere meter of the feeder coming from 220/132 kv substation is more fluctuating than the generating one.
    Why?
    Please tell me.

    Reply
  90. bengabi's avatar bengabi says:
    December 7, 2016 at 11:08 am

    hi if i step up dc to ac like from 4v dc to 500v ac would the amps also increase as much as the volts. question 2 in an inverter circuit diagram i saw three ground symbol one from the negative terminal of the battery do i have to physically dig a hole and put an earth there or is there any other way out to make it cheaper

    Reply
  91. Gwamna Abel's avatar Gwamna Abel says:
    December 16, 2016 at 2:12 am

    what is the require height of the thunder arrestor of building that is 15 meters?

    Reply
  92. Sarang Mehetar's avatar Sarang Mehetar says:
    February 25, 2017 at 4:52 am

    It is very useful site.Thank you.

    Reply
  93. GANESH's avatar GANESH says:
    March 2, 2017 at 5:25 am

    PLEASE ADVISE ME BEDSIDE TABLE POWERSOCKET,TV OUTLET,TELEPHONE OUTLET ,LIGHTINGING SWITCH ARRANGEMENT AND ACCORDING HEIGHT AS BASED ON REGULATION OR PURPOSE?”

    Reply
  94. saravanan's avatar saravanan says:
    April 14, 2017 at 8:38 am

    the difference between earth resistance and earth electrode resistance?

    Reply
  95. Rakesh's avatar Rakesh says:
    May 20, 2017 at 1:20 am

    What is the distance between two bus bar, phase to phase

    Reply
  96. Sthitodhi mukherjee's avatar Sthitodhi mukherjee says:
    June 24, 2017 at 5:23 pm

    Sir
    I am sthitodhi mukherjee ,wbsetcl,junior engineer (electrical) postted at burdwaman 132kv substation.l have read of ur all docoments and learn many things and thank u for share ur vital docoments.
    I have requested to u how to design substation grounding and relay panel design ?

    Thanking u

    Sthitodhi mukherjee

    Reply
  97. abhinav srivastava's avatar abhinav srivastava says:
    July 7, 2017 at 1:16 pm

    what is the differnce between switch and starter?

    Reply
  98. cleanwell's avatar cleanwell says:
    September 30, 2017 at 9:54 am

    so so useful, how i wish all electrical engineering personnel’s should subscribe here.

    Reply
  99. cleanwell mudenda's avatar cleanwell mudenda says:
    September 30, 2017 at 9:56 am

    so so useful, how I wish all electrical engineering personnel’s should subscribe

    Reply
  100. Rohit Daddikar's avatar Rohit Daddikar says:
    January 19, 2018 at 9:17 am

    Dear Sir,

    I am working as Safety Executive in construction industry. I am working with Adani Contractor in Shantigram Project. Ahmedabad. I have confusion about Lightning arrestor. I want to know as per IS what is the minimum height required for fixing lightning arrestor? Is there any formula or any location/area required for fixing? Please guide me.

    Thanking You
    Rohit Daddikar

    Reply
  101. Anto Shiyam Prakash's avatar Anto Shiyam Prakash says:
    June 19, 2018 at 12:23 pm

    Dear sir,

    we have LPG storage bullet with capacity 25 MT in our company. And there is a work in progress for installing 110KVA HT line over it. We afraid of safety in that case. What will be the minimum clearance between the LPG bullet and HT line to ensure safety. Kindly help me out on this issue.

    Thank you,
    Anto Shiyam Prakash. D

    Reply
  102. GIRISH's avatar GIRISH says:
    July 10, 2018 at 1:54 am

    Not possible at all

    Reply
  103. deepla's avatar deepla says:
    July 12, 2018 at 7:07 am

    Dear sir,
    how to select transformer termination HV side,cable box termination or direct to connect on bushing?.and please given with rating

    Reply
  104. sadashiv salaskar's avatar sadashiv salaskar says:
    September 9, 2018 at 4:50 pm

    nice content sir i really loved and i think i never see such a content at one page awesome

    Reply
  105. kiran sahu's avatar kiran sahu says:
    October 17, 2018 at 5:05 am

    Very Useful for all the Freshers.
    Thank You for sharing these important questions with us. Answer sounds more confident. This article motivated me.. thank you..!!

    Reply
  106. shantilal's avatar shantilal says:
    November 6, 2018 at 5:46 am

    Dear Jignesh Sir
    Is it possible to synchronize CAT 2000 KW & Cummins 2000 KW DG sets on same synchronizing panel. Is yes than how, If not, than why? Can you please clear my doubt.
    shantilal parmar

    Reply
  107. NASEEM's avatar NASEEM says:
    February 7, 2020 at 5:06 am

    Dear Sir

    Can you guide me?
    How much Load we consider for 6/16 A switch sockets as per standard ?

    Reply
  108. Akande ganiu's avatar Akande ganiu says:
    February 13, 2020 at 7:14 am

    How to derive neutral in a transformer

    Reply
  109. Lima imsong's avatar Lima imsong says:
    October 9, 2020 at 2:32 pm

    I bought electric pole and wire to divert power supply line from my land as the power department asked me to do so. Today the power department has abondoned the pole. Do I have rights to claim the pole and wire I bought?

    Reply
  110. vikas's avatar vikas says:
    February 13, 2021 at 11:53 am

    Sir Please give the mechanical design related imortant notes

    Reply
  111. sagar parmar's avatar sagar parmar says:
    February 17, 2021 at 11:47 am

    sir can you please explain how demand/fixed charges, wheeling charges, energy charges calculated in electricity bill of commercial load.

    Reply
  112. arun tarar's avatar arun tarar says:
    April 5, 2021 at 7:56 pm

    I am lookin for British or American Code recommending use of GI Strips for Earthing.

    Reply
  113. Arun's avatar Arun says:
    June 19, 2021 at 11:47 am

    Dear Sir,

    Thank you for giving us knowledge.

    Kindly give busbar supporting calculation for 65kA.
    how much distance is necessary of two busbar support and its calculation.

    Reply

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