Hello guys
I am a little puzzled with a job I am currently working on.
A hotel we currently do work for had an EICR carried out by what appears to be quite thorough firm with regards to their items highlighted which all appear understandable with the exception of one on which we can’t get to the bottom of.
On 3 (3phase 18 way) consumer units each located at differing locations within the hotel we had highlighted “Higher than expected earth leakage”, each board has between 2.8a supposed leakage.
After clamping my amp meter around all 3 lines & N I had the same values highlighted being between 2-3a on each board on the sub mains. (Nothing down the earth)
We suspected the final circuits to have earth leakage from equipment plugged in however after isolating the DB the 2-3a remained.
We then isolated the sub mains to each board and the number was still 2-3a on each board.
I suspect induced current on the sub main as with the supply isolated to the sub main the same 2-3a remained on each board.
Whilst I can’t conclude the source of this possible induced current I cant see any issues with it or am I wrong?
Thanks guys will be interested to hear any punts.
I am a little puzzled with a job I am currently working on.
A hotel we currently do work for had an EICR carried out by what appears to be quite thorough firm with regards to their items highlighted which all appear understandable with the exception of one on which we can’t get to the bottom of.
On 3 (3phase 18 way) consumer units each located at differing locations within the hotel we had highlighted “Higher than expected earth leakage”, each board has between 2.8a supposed leakage.
After clamping my amp meter around all 3 lines & N I had the same values highlighted being between 2-3a on each board on the sub mains. (Nothing down the earth)
We suspected the final circuits to have earth leakage from equipment plugged in however after isolating the DB the 2-3a remained.
We then isolated the sub mains to each board and the number was still 2-3a on each board.
I suspect induced current on the sub main as with the supply isolated to the sub main the same 2-3a remained on each board.
Whilst I can’t conclude the source of this possible induced current I cant see any issues with it or am I wrong?
Thanks guys will be interested to hear any punts.