Main Earthing Conductor current

[Paultrim123321]

Being inquisitive this afternoon I decided to put my clamp meter on the main earthing conductor of a large commercial electrical installation I'm on at the moment. The supply is 2500A, with leakage measured on main incoming Earthing conductor to METwas nearly 5 amps. Any thoughts?

 

[telectrix]

don't fit a RCD.

 

[Guest55]

^^^lolz.
:-D

 

[Paultrim123321]

don't fit a RCD.

Lol, I was just about to order a 4A MCCB too....

 

[44ALLAN]

Lol, I was just about to order a 4A MCCB too....

It's 'leakage' current not 'fault' current mate ...................hopefully

 

[Paultrim123321]

Lol, I was just about to order a 4A MCCB too....

It's 'leakage' current not 'fault' current mate ...................hopefully

Yep I know its leakage,
I was jesting about 4A RCCB, typo 'M' for a 'R', doh

Interesting tho, almost no IT equip. on install, lots of motors and control tho

 

[44ALLAN]

Doris Stokes I ain't

 

[Darkwood]

Its normal .... nothing to see hear!!!:yes:

 

[snowhead]

I've seen more than that on a 1000a supply and it's called Diverted Neutral current nowadays.

 

[plugsandsparks]

seen 14amps on a 200A TP supply, did raise my eyebrows, traced it to old florries