Call out to an Overloaded board

[Robert cooke]

Was called out tonight to this beauty of a job. They’ve been having problems with they’re air source heat pumps, which are fed from a sub main.

Consequently, they have plugged in 7 x 2kw fan heaters to warm the house. Now, the sub main has been fed directly from the top of the rcd (see picture), no mcb to protect it. My thoughts tell me this is a big no no, but the guy will go for the jugular of the guy who fitted it all, so hopefully you will all either agree or disagree before I speak to him tomorrow ?

I need to look further, but I suspect that all the heaters are on circuits on the same rcd, so can we put that much of a catastrophe down to just overload? Surely it should of tripped? It took out the 100a dno before it stopped.

Cheers

 

[Robert cooke]

A very very long day later... board replaced, torched wires replaced and the submain redone for good luck !

 

[telectrix]

View attachment 41104 View attachment 41105 A very very long day later... board replaced, torched wires replaced and the submain redone for good luck !

looks good from here.

 

[Dave OCD]

Robert you've done a good job there and please don't think I'm being critical but I wouldn't bunch the live and neutrals of several circuits tightly together and cable tie them, better to leave a bit of air around each conductor in my opinion.

 

[Pete999]

Robert you've done a good job there and please don't think I'm being critical but I wouldn't bunch the live and neutrals of several circuits tightly together and cable tie them, better to leave a bit of air around each conductor in my opinion.

Mine as well

 

[EbolaSideRoom]

Nice job. The newer Easy 9 boards are a little idiosyncratic but they do have a good amount of space to work in.