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Steve D

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Hi All,

I'm rewiring a garage. There is SWA into the garage and I intend to fit a new RCD protected garage CU with 16A & 6A breakers.
Would you recommend putting a 25A or 32A breaker in the main CU ?

I haven't inspected site properly yet but I just had a thought with respect to the existing SWA cable sizing which is currently buried. Am I right to assume that the cable needs to be sized in accordance with the size of the CU fuse? Therefore a 32A breaker at the CU demands that the cable is capable of carrying minimum 32A ?

Excuse my ignorance but I'm never really worked with SWA in the real world before, so what is the difference between tables 4D4A 70C armoured thermoplastic and 4E4A 90C armoured thermosetting? I've got a note in my regs to generally use table 4E4A but naively, I don't really know have to identify what type of SWA exists.
Will there be some sort of code on the external of the cable for me to identify ?

Cheers
Steve
 
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