"Andy Wade" wrote in message
...
ARWadsworth wrote:

How do you test an MCB?

Pass current through it and see if it trips. Use a variac and a
low-voltage high current transformer, and wind the current up slowly. Not
really necessary though, since (IME) they never fail, unlike RCDs.

--
Andy

That is not a test used on any NICEIC inspection. Maybe it should be.

Adam