PDL56 series hazard?
Posted: Wed Nov 29, 2023 7:38 pm
Hello everyone, a bit of an odd one here:
Long story short, I've been tagging this guy's gear for a while. He rings me up saying one of his staff has received a shock while unplugging 3-phase lead, can I please check it out. Standard 56 series plug and socket, older screw-together type.
Lead passes continuity and insulation resistance P-E etc, visually nothing obvious, I'm about to clear it when I had the sudden urge to test from phase to the two mounting screws.
Sure enough, there's direct continuity from one of the screws to A-phase. Pull the plug apart to find some clown had stripped the outer sleeving way too far, and pinched the phase wire between the front and rear of the plug, and to top it all off put the mounting screw directly through the phase wire. (will try upload pic, though I'm sure you get the idea)
Couple questions: has anyone ever come across something like this before?
Should the mounting screws on plugs etc be tested as part of 3760 or similar? Bear in mind it's an extension lead, should exposed metal be bonded (good luck with that) or is the plug more like a class II?
The staff member got cleared medically, thankfully, though still annoyed.
Any thoughts, suggestions or questions would be very welcome...
Long story short, I've been tagging this guy's gear for a while. He rings me up saying one of his staff has received a shock while unplugging 3-phase lead, can I please check it out. Standard 56 series plug and socket, older screw-together type.
Lead passes continuity and insulation resistance P-E etc, visually nothing obvious, I'm about to clear it when I had the sudden urge to test from phase to the two mounting screws.
Sure enough, there's direct continuity from one of the screws to A-phase. Pull the plug apart to find some clown had stripped the outer sleeving way too far, and pinched the phase wire between the front and rear of the plug, and to top it all off put the mounting screw directly through the phase wire. (will try upload pic, though I'm sure you get the idea)
Couple questions: has anyone ever come across something like this before?
Should the mounting screws on plugs etc be tested as part of 3760 or similar? Bear in mind it's an extension lead, should exposed metal be bonded (good luck with that) or is the plug more like a class II?
The staff member got cleared medically, thankfully, though still annoyed.
Any thoughts, suggestions or questions would be very welcome...