Circuitry and Related Parts of BS 7671: 2008
C 11.3 Radial final circuits Figure C 11.2 is based upon that in Appendix 15 of BS 7671:2008.
20A Radial 20A All live conductors 2.5 mm2
BS 1363 socket-outlet
32A Radial 30/32A Live conductors 4.0 mm 2
BS 1363 socket-outlet
Unfused spur An unfused spur run in 2.5 mm 2 cable should feed one single or one twin socket-outlet only. An unfused spur may be connected to the origin of the circuit in the consumer unit.
2.5 mm
2
Spur circuit using an FCU The number of socket-outlets supplied from a fused connection unit is dependent upon the load characteristics having taken diversity into account.
1.5 mm 2
Figure C 11.2  Radial final circuit information diagram.
89
C