Summary: Learn how to prepare and wire a fused connection unit (FCU).
* Notifiable project requiring Building Control approval if installation is located in a kitchen, bathroom or other special location.
An FCU is a socket with an integral fuse used for connecting high-wattage appliances, such as cookers, extractor fans, central heating timers and heaters, to a circuit. You can connect an FCU to a circuit by replacing an existing socket outlet with an FCU, or by running a spur from a socket outlet on a ring main circuit or from a radial circuit. FCUs can be flush-mounted which allows the cable to be concealed in the wall, or wall mounted with the cable covered by trunking.
An FCU is fitted with a fuse holder in the face-plate that takes a 3 amp fuse for appliances using up to 700 watts and a 13 amp fuse for appliances using higher wattage. They may also have a neon indicator light. FCU units can come with or without a switch but if it is not fitted with a switch, the appliance it supplies must have an on/off switch.
A fused connection unit.
An FCU is fitted with two sets of terminals. The Live and Neutral terminals will be marked Load or Out and Mains or In. Be aware that the Mains terminals can also called Feed or Supply.
Now connect the spur cable to the FCU.
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The colour-coding system for electric cable changed in 2006, make sure you read Electric cable and flex to view the new information.
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