Cooker and shower on the same circuit

I do assume that you know that NONE of that is anything to do with MIRA, and similarly trying to make the wiring regulations up as they go along? It is simply NOT THEIR PROBLEM, and such comments would be ignored by the DIY people who you cite anyway!

SHOCK HORROR READ ALL ABOUT IT. I wired an outbuilding today that is fed from a cooker circuit. An existing 4 core S.W.A. ran to the wood shed in the garden but had not been connected at the house by the cooker control panel. It may have been disconnected when a kitchen extension was built.

Anyway I wired some 2.5mm2 T&E from the 32 Amp R.C.D. protected cooker control unit to the outside, then to a 13 Amp. switched fused connection unit, then to the existing 4 core 1.5mm2 S.W.A. cable. I paired up the 4 conductors. The circuit supplies 2 double 13 Amp. sockets in the wood shed.

Jobsagoodun.

Z.

Yes fine Zoom, what is the shock horror bit about?

Wow Zoom, Shock Horror - yes some folk think "It`s not in the OSG therefore it is so very wrong" lollipop circuit often gets that response. I saw a defect by a NICEIC firm. 6.0 T & E (probably was an unused cooker circuit I thought) feeding an Immersion heater isolator then a 2.5 T & E a small distance to a second isolator feeding a second isolator to another immersion heater. 32A MCB feeding the circuit, conductors nice and secure and capable of passing appropriate loading, but to them it was as defect. Thing is the same firm made no comment of the bathroom fan timed overun , the SWL and N  and E taken from the lighting circuit yet perm L for overun taken from the back of a socket. Didn`t even have a fan isolator either 

well the OSG as a recipe book  is fine, as a bible it is not. 

(follow these ideas,  then when you get confident you can go off and do your own recipes) vs "these are the commandments "

Sadly some folk confuse the two approaches.
I'm sure most truly dangerous cases fail the 'is it in the OSG?' test. The reverse, 'it is not in the OSG it must be a danger' is not generally true.

mike.

Wise words Mike 

I must consider that the OSG (whilst it sells well) shouldn't be required by any competent electrician. Why are people THAT unsure, even for simple installations up to 100A? As Mike says it is a recipe book, and it is probably reasonably idiot proof , which many cooking recipes are not! The overall implication must be that we have many idiots, but I probably shouldn't say that.

Indeed you shouldn't say that ..

Consider if the IET re-titled the OSG as ' The idiot's guide to wiring'  it might not look so good on the dashboard of the transit van and the price would probably need to fall.

And there are other contenders for a similar sounding title, but this time not meaning the reader is an idiot ... read the reviews for this.

You might get away with calling it The IGW and not explaining the acronym, but to be fair the installation guidance does suit a great many situations, and will produce good, if a bit oversized, installations and it saves carrying the bible. However, it is not an inspectors tool for making a pass/fail decision.

Mike

I remember that name from somewhere, there was someone saying a lot of really silly things once, probably some kind of troll.

I am just debating if it’s appropriate to post a picture of the consumer unit I had the cover off yesterday.

The highest rated MCB in the consumer unit is a 32 amp, it supplies a 12 kW electric boiler for the central heating.

That is only one of the issues, another was a socket ring circuit supplied two B16 MCBs, one on each end of the circuit, and many other potential issues.

The consumer unit was replaced as part of a £15K package supplying PV, battery storage, solar diverter on the hot water cylinder and replacing the gas boiler with the electric boiler.

All the work is actually out of the scope of the OSG, because the supply is 116 amps and there are no standard circuits for a 53 amp boiler.

The IET urgently need to extend the scope and content of the OSG to actually keep up with changing technology and installation practices.

More guidance is required, not less.