Evening all, need some advice, I have got a 60amp supply to my garage which
is 40mtr's from the house mains position the SWA is 16mm 2-core using the
wire armour as the earth which is connected to the house earth via a 60amp 1
way fuse box wired in to the out going meter tails via phase blocks, in the
garage there is a 80amp 30mA RCD.Using an RCD tester the trip times are well
under the 200ms max, think it was about 0.05ms time on fast trip but is this
a true test in the event of someone coming in to contact with a live wire,
i.e. doing an RCD test you test between live and the earth ( which goes back
up to the house earth ) so would not simulate live to the ground of the
garage ???? is there another type of test you can do to simulate this.

Richard