Hi Fellas,
I intend to run a length of 4mm 3 core swa from the cu in my house down to my outhouse which is approx 35 m away. This will supply a mini cu with 3 circuits 1 lighting (10 x 50 w) and two 20 amp radials for sockets each radial has 3 sockets on each. It will be used for a band to practice and the heating side in winter will be with portable gas heaters nothing heavy duty will be used and just some table lamps. What size mcb should the circuit to the outhouse be protected by? I originally thought 32a bought have calculated (inc volt drop) that 20a maybe needed to protect the 4mm swa?
I intend to run a length of 4mm 3 core swa from the cu in my house down to my outhouse which is approx 35 m away. This will supply a mini cu with 3 circuits 1 lighting (10 x 50 w) and two 20 amp radials for sockets each radial has 3 sockets on each. It will be used for a band to practice and the heating side in winter will be with portable gas heaters nothing heavy duty will be used and just some table lamps. What size mcb should the circuit to the outhouse be protected by? I originally thought 32a bought have calculated (inc volt drop) that 20a maybe needed to protect the 4mm swa?