Testing old MCBs to check they operate correctly

[Amp David]

As far as i know, there is no way of checking an MCB for correct operation.

Then today, i've been told you can do it by placing the breaker under load and using an EFLI tester to do it.

How the hell would this work, sound like bull to me.

 

[telectrix]

get them to show how it's done. can't see how you can possibly know the current flow and trip time though

 

[Mark.W]

Short L - N......

Oops did I just say that!?!?