Electricity is brought into your home from the main supply by a service cable, which ends at a terminal box called the service head or sealing chamber. This box contains a fuse that protects the whole installation and allows engineers to switch off the supply when they need to carry out maintenance work. Close to this box is the meter. From the main supply to your meter, the installation is the property and responsibility of your electricity supplier and at no time should you interfere with it. Beyond the meter, the electrical installation is the responsibility of the consumer.
The heart of the consumer's installation is the consumer unit, or fuse box. This box houses the main switch that governs the entire electrical supply to your home and the fuseways, which protect the individual circuits in the house. It also incorporates the main isolating switch with which you can turn off the supply of power to the whole house.
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