Answer / koti

It is not minimum but maximum which is less than 1 ohm.

Answer / jithendra

static earthing is to be below 2 ohms.
plc & transformer neutral earthing is to be below 1 ohm.

lighting earthing will also come under static earthing

Answer / kanhaikumar

25 ohms

What is converter transformer? Diff b/w converter transformer and distribution transformer? why we use converter transformer in place of giving supply to drives?

1 Answers  

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Why the brushes used in dc machines are made of carbon not from other metal?

3 Answers  

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How the speed of synchronous motor changes with the variation of load?

1 Answers  

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Hot Water System (HWS). Will a 30ma elcb have more nuisance tripping than 100ma elcb

1 Answers   CIMC,

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which motor will u use in refinaries?

1 Answers   IOCL,

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what is ballast

1 Answers  

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How to calculate the Sizes of the cable required for one specific load? Is there any formula for that? ( EX: For 400KW load,50mtr Length, What is the LT cable Size required?)

2 Answers   Texmo,

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what the function breaker failure scheme, how is it operated

0 Answers  

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11 KV Power cable end earth connection insulation got burned wht is the reson pl give the resons

2 Answers  

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how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?

0 Answers  

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why the name mho relay,despite the locus of circle is impedance?

1 Answers   KSEB,

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what is difference of electrical and electronics

6 Answers   SSIL,

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