Fault-finding ...Dishwasher involved

[xAlex]

Morning all,
My friend has asked me to have a look at a double-socket. He recons that when he plugs the dishwasher in, the RCD trips. Also, there are signs of heat damage (black) on the socket. So, it could be the dishwasher with a leakage current or a loose connection in the socket.

What is the best way to approach this? I think I should:

1. Plug the D/W into another socket using an extension. If the RCD trips, the problem is with the D/W.
2. If the RCD does not trip above then change-out the socket.

Any other suggestions?

...Also, I only have a multimeter. If there is a leakage current in the D/W, would testing resistance across L/E and N/E (at the plug) show less than Infinity?

Thanks,

Alex

 

[Taylortwocities]

Yes, move the D/W to another socket. Preferably to another socket on a different circuit, in case there is an inherent problem on the first circuit!

The socket must be changed if it is damaged/show signs of stress.

You will not be able to detect insulation resistance/leakage using a standard multimeter. You could try measuring beween the neutral and live to earth of the dishwasher using the highest range (20megohm eg). You should get infinity. Anything less would indicate a problem.

Dont go prodding the house wiring unless u know what you are doing.

 

[xAlex]

...OK, Sounds good. Thanks.
A