The Megger MST220 is a compact, plug-in socket tester designed to quickly and clearly identify wiring faults in UK BS1363 13A sockets. With tri-colour LED indicators and audible alerts, it provides immediate fault diagnosis for over 17 common wiring errors, including missing earths, reversed polarity, and incorrect connections. Ideal for electricians and installers carrying out inspection, testing, or maintenance in residential and commercial settings.

• Instant Fault Detection: Identifies more than 17 wiring errors such as missing conductors, reversed polarity, and incorrect connections.
• Clear LED Status Indicators: Tri-colour LED display gives fast visual feedback on socket status, ideal for use in low-light conditions.
• Audible Signal Output: Provides sound-based confirmation of correct or incorrect wiring for enhanced safety and usability.
• Plug & Play Operation: Designed for ease of use—simply plug in to diagnose socket issues with no setup required.
• Built for Daily Use: Rugged, durable construction ensures long-term reliability for regular on-site testing.