What are the various methods for effecive earthing in a
factory in a rocky terrain, where soil resistivity is
extraordinarily high? The usual method of 3 m deep earth
pits is not serving the purpose.
Answers were Sorted based on User's Feedback
Answer / ashish
If Earthing Resistance Value is more than minimum specified
value & one pit can not serving the you have to provide
Three to Four Earthing Pit Which are Interconnected
Together Making The Earthing Mat So The Total Effective
Value Will be Less.
| Is This Answer Correct ? | 15 Yes | 3 No |
Answer / joby
here the soil resistivity is high. so mat earthing is provided
| Is This Answer Correct ? | 15 Yes | 4 No |
Answer / brian
Import good black soil from some where else,mix it with alot
of salt and charcoal dust, dig atleast 2 pits in a space of
10metres apart.
Let each pit have its own earth mat and burry it wit the
mixture mentioned above ie salt, black soil and charcoal
dust and then bond or interconnect the earth mats wit an
earthwire of ATLEAST 35mm2.
Finally pour alot of water in the pits.
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / blake australia
There are some powders which harden (i.e. erico make some I
think). Generally would drill a fairly deep hole. insert
earthing rod and surround with these earthing enhancers.
Try to avoid gell or powder forms of earth enhancer as they
tend to wash away when it rains
| Is This Answer Correct ? | 7 Yes | 4 No |
What is harmonics. How does it get generated and means to arrest harmonics
tell me exact relation b/n voltage and current and which one is depend other
What is meant by rating error prevention in breaker??
what is mean by live tank and dead tank in current transformers?
control wiring purpose,standards, ferrule code standard, interlock, schematic, symbol
What is communication? What are the different stagesin the communication process?
If i have two 3000 kW motors and the whole facility requires a 10 MVA transformer. What would be better installing two 5 MVA transformers(one for 1 motor ) or just a single 10 MVA transformer for both of them. Give reasons for your answer.
Hi, I'm going to attend BHEL interview for exexutive trainee (ET ) on 22nd DEC . Till now if anyone attended the interview pls help me out regarding the interview. I'm an electrical engineer
How much costly in percentage wise is sandwich busduct costly than air insulated busduct of any rating?
show that power dissipated by a pure inductor exited by a sinusoidal voltage source v = vm sin wt is zero
what is encoder & its use?
In Swinburne's Test on D.C.machines, why the efficiency is more when the machine runs as generator than when it runs as motor???
6 Answers College School Exams Tests, GE, MVR, Practical Viva Questions,
Civil Engineering (5086)
Mechanical Engineering (4456)
Electrical Engineering (16639)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)