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16A on Ring

RustyH
Evening all,


I have a client who is looking for their swimming pool heat pump to be wired up. Manual requests for a 16A connection (although client has been running off a 13a plug!!).

The layout of the house and garden restricts the direct connection to the CU to being long and messy. 


The most direct route is to the lower socket ring. Im sure I remember reading on the old forum that a 16a RCD can be classed as a FCU. 

I can not seem to find reference to this in the regs though, is it stated in there?


If it is acceptable I could spur off this lower ring, in to a weatherproof CU with a double pole 16A RCD, then run SWA up the garden to the heat pump. 


Cheers

Rusty

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  • 0
    Given its now been removed from the latest editions, and doing so would result in none standard installation

    To be accurate, while the regs no longer offer it as a 'deemed to comply' solution, that's still a long way from being a non-standard (as in doesn't comply with BS 7671) installation. I think the worst you can say is non-conventional. Much of the "rules" for ring circuits have been taken out from the normative parts BS 7671 over the years and now only exist as general guidance. It's likely a 16A MCB fed from as ring could still comply with all of BS 7671's requirements, just you'd have to do a bit of extra work to prove it.


    I wouldn't want anyone to get the idea that a 16A MCB fed from a ring is an instant non-compliance with BS 7671 for instance - I know of one or two installations that have (or had) just such an arrangement.


      - Andy.
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  • 0
    Given its now been removed from the latest editions, and doing so would result in none standard installation

    To be accurate, while the regs no longer offer it as a 'deemed to comply' solution, that's still a long way from being a non-standard (as in doesn't comply with BS 7671) installation. I think the worst you can say is non-conventional. Much of the "rules" for ring circuits have been taken out from the normative parts BS 7671 over the years and now only exist as general guidance. It's likely a 16A MCB fed from as ring could still comply with all of BS 7671's requirements, just you'd have to do a bit of extra work to prove it.


    I wouldn't want anyone to get the idea that a 16A MCB fed from a ring is an instant non-compliance with BS 7671 for instance - I know of one or two installations that have (or had) just such an arrangement.


      - Andy.
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