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When circuits are updated, why are the circuits increased in rating. 30amp fuse >32amp breaker 5amp fuse > 6amp breaker 15amp fuse > 16amp breaker Surely this has now given the cable more chance to heat up in the event of a fault?

Re-working an old CU. It can be upgraded using plug-mcb's but this has no earth fault protection, right? I know best thing is a change to an all singing new consumer unit, but thats far too adventurous for me. Do anyone do "plug-in" RCBO or RCCB devices that would handle earth fault as well as...

Does anyone use calculation software based on BS 7671, like the design software here: http://www.amtech-power.co.uk/product_30.htm Do you not use it because its another expense, or you are quick enough to finger through the book itself? Yes I know PDA or laptop can get a flat battery! Cheers

I have seen the supply cable the electric board have done before and it looks like the house is being attacked by an anaconda, some bend!!

Whats the best way to handle SWA going through exterior wall. Its 6mm 3 core SWA and of course more stiff than T&E 6mm. Its running from underground trench (conduit) up the exterior wall, through hole and swept round to a 2wCU/DP isolator. Every cable has a radius limit, so how would you...

It was failing before service, thought it was dirty oil but everything clean now! Solenoid does get warm. I have a voltage tester, anywhere to test the solenoid?

Could it be the solenoid failing , going by the fault I have? Maybe swap this by itself, that might work?

I have a problem with my EOGB oil burner, its just been serviced and cuts out after approx 3 mins whilst running. It has two new filters, new nozzle, new flexible oil line. Oil pressure gets up to what I set it at (100psi on Danfoss BFP 21 R5) and stays constant. Could it be the solenoid...