Fused spur wired off cooker switch

[longers30]

Hi everyone was looking for some advice on a job that I looked at last night. The house has a new boiler being installed which needs a supply to it. There is an existing cooker switch wired in 6mm on a 30A fuse going to a single socket which the electric oven is plugged into. There is also a switched fused spur directly adjacent to the cooker switch wired in 2.5mm which used to supply an extractor fan. Is it ok to connect the new boiler to this fused spur or is the cooker required to be on its own separate circuit? There is also no RCD protection on the existing old Wylex board which uses bs1361 fuses. Thanks in advance!

 

[telectrix]

can't see a problem here. the FCU is already energised i assume, so you are not making any alterations to the fixed wiring. therefore the lack of RCD is irrelevant. i'd certainly consider upgrading the CU though.

 

[dave274]

is the boiler going next to the fused spur? if your planning on burying any cable then you need to change it to an rcd spur unless the cable is otherwise protected.

 

[longers30]

Yes the boiler is next to the spur so will be surface mounted so I assume RCD protection won't be required

 

[Guitarist]

Yes the boiler is next to the spur so will be surface mounted so I assume RCD protection won't be required

You need to check the boiler instructions. May say that it MUST be connected to a supply with 30mA protection.

 

[telectrix]

good call. though why should manufacturers specify RCD when nothing in BS7671 calls for one?

 

[Guitarist]

good call. though why should manufacturers specify RCD when nothing in BS7671 calls for one?

Was just a thought

 

[davethsparky]

To cover their arses when they have lowered their manufacturing standards and quality control.

 

[longers30]

Thanks for all the prompt replies I will check the manufacturers instructions later and also advise on upgrading the cu.

 

[Engineer54]

Thanks for all the prompt replies I will check the manufacturers instructions later and also advise on upgrading the cu.

If the instructions are from a European/Scandinavian country manufacturer, (and most are these day's) then you can take most of the requirments with a pinch of salt!! Comply with BS7671 and you can't go far wrong....