Spur sockets

The total number of non-fused spurs must not exceed the total number of socket outiets and pieces of stationary equipment connected directly in the circuit. The cable used for non-fused spurs must not be less than that of the ring circuit. The requirements concerning spurs are given in Appendix 15 of the lEE Regulations but the various circuit arrangements may be expressed by the block diagrams of Fig. 14.14. 

A non-fused spur may only feed one single or one twin socket outlet. 

Non-fused spurs may be connected into the ring circuit at the terminals of socket outlets or at joint boxes or at the origin of the circuit. 

The general arrangement shown in Fig. 14.16 shows 11 socket outlets connected to the ring, three non-fused spur connections and two fused spur... 

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