Unfortunately, this is the reason that the rest of us have to mess around with getting Part P certification when we do anything to our own properties despite being more than adequately qualified (ie electrical engineers who have to pay an electrician to put a shower in).
Very true quote – but rules are rules I suppose.
I am and electrical engineer and have recently re-commissioned 2 132kV -11kV grid transformers and I am currently testing most of the protection on the 11KV ccts feeding B'ham city centre – yet after I replaced my wylex fuse board for an RCB prtected one – I need a spark to check out what I done
Yea it is a bit crazy I am a qualified installation electrician ( and ex aircraft electrician) and I can do anything anywhere from factorys to domestic for any company and certify my own work and provide test documentation to prove safe etc
But I am not part P registered so I cannot do my own place 🙄
HTF does that work
BTW the reason you 30a breaker does not trip immediatly is because breakers trip on a logrithmic time curve ie at 40 amps as you say about 5 minutes but at 80 amps about 3 seconds
Please get it done properly electricity is dangerous stuff lets not talk worse case scenario, but if your place burns down due to a electrical fault and it is found that cables were overloaded insurance companys will wriggle like crazy and NOT pay up