flyingspark
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- Mar 3, 2009
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Hello,
I have been asked to rewire a flat, of which the owners dad is an 82 year old retired spark. He wants to help out, to save his daughter (the owner) some money.
I met him at the flat and we had a walk around, he seems to know the installation well as has worked on it over the years. He said the sockets have been wired - (please see my attached diagram), as a ring where most, if not all the socket outlets are fed from junction boxes from a ring.
He wants me to rewire it like-for-like, mainly so that the same conduit embedded in the wall can be used. This conduit is 10mm or 12mm (not 20mm so wont take two lengths of 2.5), The flat has concrete floors, and no access from above the ceiling. I have been thinking long and hard about this and cant decide if its is permissible.
My main questions are -
Would the plug top fuses count as to adequately protect the spur conductors against overload?
Or, would the intended 32A RCBO (currently 30A BS 3036 Rewireable fuses) cover the spurs?
If using mostly Method C, 2.5mm3, the current carrying capacity is 20A, so how are non fused spurred socket outlets normally protected, 433.3.1 I think?
The regs also say that the total number of non fused spurs should not exceed the total number of socket outlets, as there are zero sockets, then purely on that basis alone I think is it a no goer, anyone?
All comments welcome.
I have been asked to rewire a flat, of which the owners dad is an 82 year old retired spark. He wants to help out, to save his daughter (the owner) some money.
I met him at the flat and we had a walk around, he seems to know the installation well as has worked on it over the years. He said the sockets have been wired - (please see my attached diagram), as a ring where most, if not all the socket outlets are fed from junction boxes from a ring.
He wants me to rewire it like-for-like, mainly so that the same conduit embedded in the wall can be used. This conduit is 10mm or 12mm (not 20mm so wont take two lengths of 2.5), The flat has concrete floors, and no access from above the ceiling. I have been thinking long and hard about this and cant decide if its is permissible.
My main questions are -
Would the plug top fuses count as to adequately protect the spur conductors against overload?
Or, would the intended 32A RCBO (currently 30A BS 3036 Rewireable fuses) cover the spurs?
If using mostly Method C, 2.5mm3, the current carrying capacity is 20A, so how are non fused spurred socket outlets normally protected, 433.3.1 I think?
The regs also say that the total number of non fused spurs should not exceed the total number of socket outlets, as there are zero sockets, then purely on that basis alone I think is it a no goer, anyone?
All comments welcome.