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Locate cables in your wall. A common DIY error is accidentally drilling, nailing or screwing things into cables hidden inside your walls. A quality cable detector can help you to track buried cables before you start work and avoid the risk of an electric shock.
Shut off the power. If you’re doing any work near electrical wiring or power supplies, where possible, shut off the power in your fusebox and use battery powered tools. To be sure that power is off before beginning DIY, plug an appliance into sockets and try switching on the lights.
Check power tools and watch out for the lead. Before using any power tools, check the lead and plug are in good condition. If you can see signs of damage (such as frayed wires) get the equipment repaired before using it. And watch out for the power lead at all times so you don’t accidentally cut through or trip over it.