Home -> Forums

Earthing In Electrical Fitting
Wed Mar 04, 2015Total posts : 1
jay prakash
jay prakash
Join date: Mar 2015
 Topic: Earthing In Electrical Fitting
Dear sir, How much Pipe/Plate should be in side the earth. kindly advice the specification for the earthing according to power load. Thanx & Regards

The comment above talks about the article   "Earthing In Electrical Fitting"
Wed Mar 04, 2015Post  #1
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008		Dear Jai
    
  • Number of Earthing Electrode and Earthing Resistance depends on the resistivity of soil and time for fault Current to pass through (1 sec or 3 sec). If we divide the area for earthing required by the area of one earth plate gives the no of Earth pits required.
  • There is no general rule to calculate the exact no of earth Pits and Size of Earthing Strip, But discharging of leakage current is certainly dependent on the cross section area of the material so for any equipment the earth strip size is calculated on the current to be carried by that strip. First the leakage current to be carried is calculated and then size of the strip is determined.
  • For most of the Electrical equipments like Transformer, DG set etc., the  General concept is to have 4 no earth pits.2 no’s for body earthing With 2 separate strips with the pits shorted and 2 nos for Neutral with 2 separate strips with the pits shorted.
  • The Size of Neutral Earthing Strip should be Capable to carry neutral current of that equipment.
  • The Size of Body Earthing should be capable to carry half of neutral Current.
  • For example for 100kVA transformer, the full load Current is around 140A.The strip connected should be Capable to carry at least 70A (neutral current) which means a Strip of GI 25x3mm should be enough to carry the current And for body a strip of 25×3 will do the needful.
  • Normally we consider the strip size that is generally used as Standards. However a strip with lesser size which can carry a current of 35A can be used for body earthing. The reason for using 2 earth pits for each body and neutral and then shorting them is to serve as back up. If one strip gets Corroded and cuts the continuity is broken and the other Leakage current flows through the other run thery by completing the circuit. Similarly for panels the no of pits should be 2 nos. The size can be decided on the main incomer Breaker.
  • For example if main incomer to breaker is 400A, then Body earthing for panel can have a strip size of 25×6 mm Which can easily carry 100A.
  • Number of earth pits is decided by considering the total Fault current to be dissipated to the ground in case of Fault and the current that can be dissipated by each earth Pit.
  • Normally the density of current for GI strip can be roughly 200 amps per square cam. Based on the length and dia of the Pipe used the Number of Earthing Pits can be finalized.
 

Questions (39)
1908
views
1
answers

installations of slab casting?

Last answer on 11/19/2020 4:21:26 AM. by S L Gupta (Civil Engg). Forum started by Sanzana Hosen
2337
views
1
answers

electrical installation

Last answer on 11/27/2021 2:32:14 AM. by Navneet Jharia. Forum started by brajesh pandey
2311
views
2
answers

Electrical fitting - Switches and sockets

Last answer on 12/12/2012 1:07:05 PM. by Vijay. Forum started by Vijay
2878
views
11
answers

Electrical Fitting and Cable Wiring

Last answer on 9/30/2020 7:45:37 AM. by Vijay Mishra. Forum started by SCK
1921
views
2
answers

I want to build a marrige lawn total I have total land area is 25000 squer fit E

Last answer on 1/20/2015 12:43:42 PM. by seema tyagi. Forum started by sarvesh gupta
18382
views
2
answers

what is per sq feet fitting cost for split ac fitting with copper type of wire

Last answer on 11/5/2021 3:48:21 AM. by Quovino. Forum started by ashok
1931
views
1
answers

REQUIRE HOUSE PLAN FOR 55*20

Last answer on 1/21/2021 4:00:29 AM. by S L Gupta (Civil Engg). Forum started by SUNDER KUMAR
1409
views
1
answers

East Side 43 fit or west side road view 39 fit or south

Last answer on 2/28/2017 2:57:47 PM. by S L Gupta (Civil Engg). Forum started by Prashant Kumar
1613
views
1
answers

I have length 60 fit , width east side 23 fit , West side 13 fit thisis my plot

Last answer on 3/8/2017 11:11:29 AM. by S L Gupta (Civil Engg). Forum started by kirankumar
45467
views
1
answers

how much cu.m of earth can excavated by machine per day

Last answer on 4/3/2021 12:46:18 AM. by prasadtvp. Forum started by sherab tenzin
2348
views
1
answers

How to fixed electrical chimeny in kitchen

Last answer on 11/17/2021 5:09:01 AM. by S L Gupta (Civil Engg). Forum started by ramesh joshy
2568
views
1
answers

cost of electrical

Last answer on 12/10/2013 11:32:52 AM. by S L Gupta (Civil Engg). Forum started by neelam rathi
11692
views
2
answers

I need the productivity norms for the Civil, structural, mechanical, electrical

Last answer on 2/2/2022 12:01:14 AM. by S L Gupta (Civil Engg). Forum started by meenakshisundaram
2550
views
1
answers

Factory Main Door

Last answer on 11/30/2021 11:44:17 PM. by S L Gupta (Civil Engg). Forum started by c k Ramaprasad
3753
views
4
answers

Whether the electrical PVC conduits be placed under or above TMT bars in RCC roof slab?

Last answer on 1/30/2017 12:00:36 PM. by S L Gupta (Civil Engg). Forum started by vinu
1972
views
2
answers

Elctrical wiring

Last answer on 3/5/2016 9:12:57 PM. by JAI PRAKASH. Forum started by kumarakrishnan
0
views
0
answers

25 by 20 fit plot per 1500sq fit G+2 ki planig ka maip& with meterial cost qotes

Last answer on 5/14/2016 10:19:15 AM. Forum started by kirtesh rahinj
1617
views
2
answers

suggest layout 36fit by 60 fit

Last answer on 5/29/2015 10:34:14 AM. by seema tyagi. Forum started by Ashish
3025
views
1
answers

Please send me House plan for plot area 31.66 fit lenth & 25.33 fit width with p

Last answer on 2/11/2022 11:25:30 PM. by Ar. Manoj Ralen. Forum started by Tapsi Yadav
10
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:29:49 AM. Forum started by rupeshji
7
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:29:40 AM. Forum started by rupeshji
6
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:29:32 AM. Forum started by rupeshji
5
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:29:24 AM. Forum started by rupeshji
6
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:29:18 AM. Forum started by rupeshji
7
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:29:12 AM. Forum started by rupeshji
4
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:29:05 AM. Forum started by rupeshji
5
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:28:58 AM. Forum started by rupeshji
4
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:28:51 AM. Forum started by rupeshji
6
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:28:44 AM. Forum started by rupeshji
3
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:28:38 AM. Forum started by rupeshji
6
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:28:31 AM. Forum started by rupeshji
7
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:28:24 AM. Forum started by rupeshji
8
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:28:18 AM. Forum started by rupeshji
9
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:28:10 AM. Forum started by rupeshji
7
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:28:03 AM. Forum started by rupeshji
5
views
0
answers

91-8769373431*//*Vashikaran Control Your !! Husband :"UaE Wife Specialist

Last answer on 12/21/2024 12:27:56 AM. Forum started by rupeshji
3
views
0
answers

~@LoNdOn,CaNaDa 91-8769373431""Love Marriage Problem Solution specialist

Last answer on 12/21/2024 12:27:22 AM. Forum started by rupeshji
4
views
0
answers

~@LoNdOn,CaNaDa 91-8769373431""Love Marriage Problem Solution specialist

Last answer on 12/21/2024 12:27:16 AM. Forum started by rupeshji
6
views
0
answers

~@LoNdOn,CaNaDa 91-8769373431""Love Marriage Problem Solution specialist

Last answer on 12/21/2024 12:27:08 AM. Forum started by rupeshji




Articles that might interest you!
Earthing
Earthing In Electrical Fitting
In electrical works, earthing or earthed means to connect electrical system to general mass of earth in such a manner ..
Electric
Electric Shock and Leakage of Current
Sometimes due to carelessness or ignorance, electric phase (Live) wire comes in touch with human body and the current ..
Electrical
Electrical Fitting and Cable Wiring
We all need power to run electrical appliances and different gadgets in our home. For proper distribution of electrici..
Which are various types of faults in electrical fitting?
These are three types of faults in electrical fitting: .Open Circuit Fault .Short Circuit Fault .Earth fault and ..
Earth Filling
Each layer of earth should be rammed and consolidated while filling it around ‘Brick Masonry’.
Switches
Switches and Sockets
Different types of switches and sockets- Get information about various switches and sockets and there uses. And select..
Electric
Electric Shock – Causes & Preventions
A little negligence during electric works can take your life. So before you engage in any electrical jobs, make sure y..
How
How to prevent electric shock?
Electricity can be deadly if not used with utmost care. When the phase or live wire touches our body, electric current..
How
How to Install Electrical Switches
Installing Electrical Switches and Sockets-Check various safety tips while installing Electrical Switches and Sockets...
Guideline for Laying, Watering and Compacting of Earth Filling
Do we all know that what are the various guidelines for laying earth filling? Here in this article you will find all t..
What are various types of glasses used in doors?
Types of glasses used in doors-Clear window glass, Plate glass, Prism glass, Quartz glass, Processed glass.......
What are advantages and disadvantages of folding doors?
Advantages of folding doors- Easy to install,washable, durable, superior sound damping. Disadvantages-sensitive to har..
What are various designs available in wooden doors?
Designs available in Wooden doors.....
What is standard size of internal folding doors?
Size, Thickness and Weight of Internal Folding Doors.......
What affects the life of doors? What can we do to increase the life of the Wooden doors?
Tips to increase the life of Wooden doors....
What is the standard size of frame for Plastic/PVC doors?
Plastic Door frame size carrying one or two shutters......
What are various frames recommended for Plastic/PVC doors?
Frames for Plastic Doors..........
Which place is appropriate for sliding door?
Appropriate places for sliding doors-Bathrooms, Backyards, Commercial structures...........
What are various frames recommended for glass doors?
Frames for Glass Doors-Wooden frames, Steel frames, Aluminium frames......
Which place is appropriate for folding doors?
Appropriate places for folding doors-Homes, Offices, Guest rooms, gives attaractive and stylish look........
What are the various accessories recommended for folding doors?
Accessories for folding doors- Door Handles, Door Fasteners,Door Viewers.......
What affects the life of doors? What can we do to increase the life of the Plastic/PVC doors?
Tips to increase the life of Plastic doors....

 
Find Information About
 
Hire Our Experts
 
Community Section
 
Tools
Copyright 2007- GharExpert.com All rights reserved.  

 
 |  Advertize with us  |  About us  |  Contact us  |  RSS  |  Blog  |  Terms of service  |  Style made simple  |  Decorating slide show  |  Tips  |  Give your feedback  |