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Garage supply

Former Community Member
Former Community Member

Hi all,

 

I’ve recently been asked for advice and found myself reluctant to give an answer without a second opinion.

Question - 

Is it possible to run in a garage supply using 4mm SWA off the house ring and protect the garage via a CU - 25A RCD with 16A and 6A MCB for sockets and lighting? 

The garage is located at the very back of the house, the DB is at the very front and there is one ring circuit for the upstairs and downstairs (Kitchen is on its own ring).

My personal opinion would be to run in a new supply from the board in the house, however accessibility is supposedly an issue and the house has been recently renovated. For which reason this method of supply has been suggested. 
 

Many thanks in advance,

 

Jack 

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  • 0

    If the circuit supplies a CU, then it's no longer a ring final circuit by definition.

    I don't read the definitions that way - not unless the ring supplies just the CU and no sockets at all. A ring connected to both sockets and a CU is still ‘directly connected to a socket outlet or socket outlets’ so meets the definition for a final circuit … and sensibly still has to meet final circuit requirements (0.4s disconnection time etc). (Same as if a ring supplied a mix of FCUs and sockets). The choice of the word ‘final’ is perhaps a bit unfortunate given its usual menaing in English, but the definitons don't seem encumbered by that.

       - Andy.

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  • 0

    If the circuit supplies a CU, then it's no longer a ring final circuit by definition.

    I don't read the definitions that way - not unless the ring supplies just the CU and no sockets at all. A ring connected to both sockets and a CU is still ‘directly connected to a socket outlet or socket outlets’ so meets the definition for a final circuit … and sensibly still has to meet final circuit requirements (0.4s disconnection time etc). (Same as if a ring supplied a mix of FCUs and sockets). The choice of the word ‘final’ is perhaps a bit unfortunate given its usual menaing in English, but the definitons don't seem encumbered by that.

       - Andy.

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