black cut out fuses

i have come across black cut out fuses that light up my single pole tester, but only on the label.

my 2 pole tester does not light up from label to MET.

is this my single pole tester being over sensitive or should i call 105?

Parents
  • Ive got the kewtech contact tool as well and yes it does give false positives, however it makes you double check for voltage , I’ve had several give 50v or so when you test to earth with the mft  tester as well .

Reply
  • Ive got the kewtech contact tool as well and yes it does give false positives, however it makes you double check for voltage , I’ve had several give 50v or so when you test to earth with the mft  tester as well .

Children
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