Caravan Mains Socket Polarity Tester

Mains socket tester commonly used in caravans, motorhomes and boats to confirm polarity and earth connection of mains supply when you connect on site.

Simply plug in to a socket in your caravan or boat once you've connected to the mains supply and this unit will clearly indicate fault conditions including

• Reverse polarity - Live and Neutral reversed
• No earth connection
• Neutral line fault
• Live and Earth reversed