Extech MG320
If you like to do things yourself around the home, then maybe a multi meter could be useful. No need to look for a power outlet, since it runs on batteries. Just get at it!
Conrad Electronic
Extech MG320 Insulation tester 50 V, 100 V, 250 V, 500 V, 1000 V 20 GΩ
£346.92
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