Earth loop testing

[xerxes]

My Robin loop tester (an older model) trips RCDs when testing. Opinion seems divided on whether bridging the RCD to get a reading is acceptable practice. What does anyone think?

What's the best way to bridge? A patch lead across the incoming/outgoing terminals, or is another approach better?

I can't afford a non-tripping tester.

 

[securespark]

So how on earth (excuse the cheap pun) do you test these RCD's?

You really should have an RCD soft test function.

 

[andy]

my tester trips RCDs aswell. just link out the RCD, or if its an RCBO, move the live out to a non-RCD MCB

 

[Adam_151]

calculate it from Ze + (R1+R2) ?