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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
    RustyH:

    Thanks again with all the guidance.


    As mentioned, Im not sure a heat pump fits in the OSG H5 catagory, as it doesnt contain any form of resistive heating element. The heat is produced through thermodynamic compression, so the electrics are only driving motors (and a host of sensors).


    There seem to be mismatch with UK sellers recommending 15A and the instruction 20A. Maybe the 20A is manufacturer overkill so they don't get returns due to tripping of lower rated protection devices during induction motor surge. The client hasnt had to replace the 13A plug fuse.


    The lower socket ring is protected by a double pole 30mA RCD at the CU


    from what I gather from googling a "branch circuit" https://www.thespruce.com/what-are-branch-circuits-1152751 it doesn't mean a spur from a socket circuit, it means its own dedicated final circuit from the CU. Ignore MIs, even crappy ones, at your peril.


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  • 0
    RustyH:

    Thanks again with all the guidance.


    As mentioned, Im not sure a heat pump fits in the OSG H5 catagory, as it doesnt contain any form of resistive heating element. The heat is produced through thermodynamic compression, so the electrics are only driving motors (and a host of sensors).


    There seem to be mismatch with UK sellers recommending 15A and the instruction 20A. Maybe the 20A is manufacturer overkill so they don't get returns due to tripping of lower rated protection devices during induction motor surge. The client hasnt had to replace the 13A plug fuse.


    The lower socket ring is protected by a double pole 30mA RCD at the CU


    from what I gather from googling a "branch circuit" https://www.thespruce.com/what-are-branch-circuits-1152751 it doesn't mean a spur from a socket circuit, it means its own dedicated final circuit from the CU. Ignore MIs, even crappy ones, at your peril.


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