dsk,
Are you really sure that that is the issue though?
Have you tested the actual earth leakage circuit breakers to rule them out?
What voltage and size pump motor is it that caused this fault to occur?
I find it very strange that a single motor could cause multiple RCD's to trip at any given time,
unless there is an issue with the neutral-earth link at the switch-board or some other poor
neutral connection somewhere in the system.
Anyone doing electrical work these days should have at the very least one of them either Fluke,
Kyoritsu or Megger multi-function testers, they give you so much in the way of things you can test.
My Kyoritsu tester allows me to upload to my laptop and it's instant test records.
I have insulation resistance to 1000V, Earth-Loop, Continuity, Earth Resistance (2P, 3P), RCD Tester.
You only have to buy it once.
Last edited by Trumpy; 10/29/21 11:46 PM. Reason: Added extra bit
