If you can see the copper conductors through the cable insulation it’s a fail on visual inspection, but it doesn’t mean the cable will fail an insulation test.


You could have a pair of uninsulated 25 mm meter tails which are absolutely lethal, but they could easily pass an insulation test. So insulation isn’t the be all and end all of determining the safety of the insulation within an electrical installation.


 Andy Betteridge

If you can see the copper conductors through the cable insulation it’s a fail on visual inspection, but it doesn’t mean the cable will fail an insulation test.


You could have a pair of uninsulated 25 mm meter tails which are absolutely lethal, but they could easily pass an insulation test. So insulation isn’t the be all and end all of determining the safety of the insulation within an electrical installation.


 Andy Betteridge