RCD tripping dilemma

Darkwood · Jun 8, 2012

This thread is a week or so old, all this ground has been covered and the OP has been made fully aware of design leakage by lighting computers etc, the limitations of removing the RCD from circuits and what needs doing if it is done for fault finding purposes, also he has been made aware of the testing sequences and the quickest way to identify problem. As recently mentioned its just going around in circles.

note what hasn't been mentioned here is if the leakage is designed high earth then the RCD could be changed to a Main switch and a SI unit 30mA put up front of board, this recognises and ignore certain design frequencies and allows for a greater no' of computers etc.

In reply to Tonk a design allowance of 3mA per work point is advisable thus making a circuit only six workstations at max, 10 workstations leaves you open to the occasional nuisance tripping.

Darkwood · Jun 8, 2012

With regards to my SI-RCD unit suggestion, its may be a quick fix but only if it is high earth design currents, but the installations is poor by design and its this that should be addressed, with all the hours spent searching the fault, a few hundred quid to fit rcbo's and front end with main switch would be cost effective and also will identify the problem circuit if genuine fault leak exists.