Just a quick question from a new qualified sparky.
So in 433.1.204 when it says the Iz of the cable must not be less than 20A for a ring final circuit.
Does this include a radial fused spur taken off the ring final?
If you install it in 2.5mm in trunking then the Iz is immediately down to 20A even before you add in any other factors. (I will be installing this in trunking with a 1.5mm lighting cable, so it will be less)
Will I have to install using a 4mm cable, or seeing as the spurred part of the circuit is protected by a 13a fuse, does that then comply with 433.1.1? (Treat it as a radial, not a ring from that point on?)
So in 433.1.204 when it says the Iz of the cable must not be less than 20A for a ring final circuit.
Does this include a radial fused spur taken off the ring final?
If you install it in 2.5mm in trunking then the Iz is immediately down to 20A even before you add in any other factors. (I will be installing this in trunking with a 1.5mm lighting cable, so it will be less)
Will I have to install using a 4mm cable, or seeing as the spurred part of the circuit is protected by a 13a fuse, does that then comply with 433.1.1? (Treat it as a radial, not a ring from that point on?)
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