Hello all!

I have a circuit, 16a 3ph&e feeding a 16a socket and it has a stand-alone RCD after the isolator, before the socket - fairly normal I think.

The test button doesn't work on the RCD, its a 4 pole unit, nothing connected to the neutral, but looking at the little circuit diagram, it looks like the test button is connected between N and E

It does trip with a fault, but is this, a) normal, b) compliant?

Im not an electrician, just an enthusiastic amateur FM