Answer / kumarabharathi

Earthing Resistance can be maintained by adding
water,charcoal & salt per month,Not only by adding those
three, Its rusted bolt& Nuts must be renewed by new one for
every three month,this maintenance should be varied depand
upon the climatic conditions, such as in rainy season.Earth
pit must be fenced with cement.

Answer / r

1. by adding water, coal., salt on monthly basis

2. by checking earth resistance of earth pits yearly

Answer / pks

by pouring the water inside the earth pits...

by checking values of earthing resistance within six months
intervals for each individual pit...

Answer / j.kesavan

earthing resistance should be maintain below 2 ohms.its
safe for machiens.

Answer / ashish patil

by pouring water ,charkol and salt is used but it is old
method.use pouring of Bentonite powder by using water.
Also to reduce earth resistance by parralel resistance to
earth mesh.it cen achived upto 2ohm.

Answer / apurb prakash

by pouring Bentonite

Answer / nagarjuna

earthing resistance is maintained below 2 ohms.we should
add salt and water where we r grounding the equipment.

Answer / pillay

dont just add water and salt it is very boring, add some curry powder and meat as well it will be more spicy.
the best solution would be to add more earth pits in parallel till you get your targeted resistance reading or lower.

Answer / rajendra soni

monthly check of earthing resistance by good earth
resistance meter.
by pouring water ,charkol and salt when ever you find that
earthing is increasing

Answer / william lobo

Better to use stainless steel bolts nuts and washers since
GI ones tend to deteriorate and get corroded after a long
time and it becomes difficult to open the bonding,
connection for taking measurements.
Simple method is pour lot of salt and water around the
earth electrode and surely you will get a very good value
of earth resistance instantly.

length of 4 core cable 95mm from substation LV VFD panel to Motor at field approximately 150 meter. Motor stop and power has been isolated from LV MCC ( Substation )to disconnect Motor for services. After Motor completed service propose to reinstall and reconnect Motor Cable, found earth cable sparkling during touching at metal / motor body. Inspect by clamp meter found earth cable have current flow AC 1-2amps and all earth cable at MCC LV also have current flow as same value. why it is happen?

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