Avoid getting a shock to the system with this socket tester from FLUKE. It plugs into any standard three-pin socket and has a simple colour-coded, three-LED display to show the status of outlets. This means you can quickly and easily identify wiring problems including earth, live and neutral faults like a pro. To keep you safe, a beeping alarm alerts you when the unit detects a voltage, enabling you to work out when a circuit is live and when wiring is hazardous.

• 300V safety rating to work with AC mains supplies
• Beeper turns off at the flick of a switch to let you carry out jobs in quiet zones

• Household maintenance
• Building installations
• Construction industry

The RCD button enables you to test sockets with integrated residual current devices. A quick press of the button should trip the RCD, so you know it's working correctly. RCD sockets add an extra layer of electrical protection. You'll find them in workshops where there are power tools and in setups with heavily used appliances.