how to check the earth resistance value& what is the
minimum earth resistance for good earthing sysytem.
Answer Posted / nasir sharif
The earth resistance value can be checked by the use of
earth resistance tester (called megger earth tester). The
best earth resistance should be less than one ohm & ideally resistance is Zero ohm but the
permissible value is less than 5 ohm
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
testing of Vector Group – YNaoD II
For a stable system, where should the poles of a system be in a root loci plot?
Diagram on interconnectivity of 11kv transformer with RMU (i.e, one incoming and two outgoing or two incoming and one outgoing)
What is the physical significance of phase.. i.e. what is exactly the meaning in layman's language.. 1 phase, 3 phase etc ???
how does grading rings & spacers in transmission line works? Working Principle?
how to calculate singlephase motor efficiency?
hi guys please tell me the procedure for mesuring the coil resistance of 3ph induction motor?
i completed my DEEE. and i want to electrical c license. how to get it..?
We are designer please help me calculate the size of 11kv cables from step up transformer to M.V panel, total load is 5 mega watt distance 900 feet (used aluminum type cables) please provided formula for calculate the cable with example.
why we used ZNO in Lightning arrester.
What is the difference between DOL starter and star delta starter
what are the advantages and disadvantages of speed control of 3 phase induction motor by varying frequency explain with drawing
How many turns are there in primary winding? (In Transformer)
what is the difference between switch yard to residential area.and how much required it.
why moisture formation found in XLPE Armoured cable outer sheath