How many sockets can you put on a spur? An unfused spur feeds one single or one twin socket, and the number of unfused spurs is capped by the sockets on the ring. A fused spur through a 13A fused connection unit can feed more, with the fuse and the real load setting the limit. This guide gives the BS 7671 rules, cable sizes, a worked example and the BG fused spur units to buy.

Swapped a cracked socket faceplate and wondered if Part P applies? In England, replacing a socket, light switch or ceiling light like for like is not notifiable, and neither is adding to an existing circuit outside a bath or shower room. New circuits and consumer unit changes are. This guide gives the rule in a table, explains what like for like really means, where the safety rules still apply, and how to choose the replacement accessory.

The X in a 10AX light switch rating is often read as extra capacity, but it describes the type of lamp load the switch is rated for. BEAMA's technical bulletin explains that A covers tungsten, halogen and inductive loads, while X covers externally ballasted lamps such as fluorescent luminaires and LED fittings with a separate driver. This guide explains how to read 10A 10AX and 20A 20AX markings on BG plate switches and grid modules. It also covers LED driver inrush and the mistakes that cause callbacks.