My upstairs lighting circuit is wired in 1mm^2 twin and earth cable, and protected by a 10A MCB (Wylex type B).
This past spring we had new (more) loft insulation fitted, and now the lighting circuit cable is under the insulation through much of its length, increasing the chance of overheating, I'd have thought.
So.....I'd like to increase the protection on the circuit by changing the 10A MCB for an 6A MCB, like this one:
http://www.screwfix.com/app/sfd/cat/pro.jsp?id=73464&ts=78471
Is this a job for a DIYer? Is it hard to fit new MCBs? Can I be sure that once I shut off the 100A main isolator switch on the consumer unit, the busbar and all cables in the CU will be 'dead'? I have a digital multimeter, but am a novice at using it.
My CU looks like this:
http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=A331831&ts=78792&id=60251
Cheers for any help.
This past spring we had new (more) loft insulation fitted, and now the lighting circuit cable is under the insulation through much of its length, increasing the chance of overheating, I'd have thought.
So.....I'd like to increase the protection on the circuit by changing the 10A MCB for an 6A MCB, like this one:
http://www.screwfix.com/app/sfd/cat/pro.jsp?id=73464&ts=78471
Is this a job for a DIYer? Is it hard to fit new MCBs? Can I be sure that once I shut off the 100A main isolator switch on the consumer unit, the busbar and all cables in the CU will be 'dead'? I have a digital multimeter, but am a novice at using it.
My CU looks like this:
http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=A331831&ts=78792&id=60251
Cheers for any help.