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This Mains Tester from W4 is a quick and easy way to ensure all your caravan electrical circuits are wired correctly. Simply plug it into a 13 amp socket and the tester will indicate any faults.

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Product code: 150976

  • Quick and easy to use
  • Plugs into a 13 amp socket 
  • Indicates faults with a series of lights 
  • Especially useful for checking for reverse polarity when touring on the continent

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