Cable clamps can often go in two ways - if you have the clamp as an 'n', try turning it over and clamping it in the 'u' position - if that makes sense!I have the cable clamp on the outer sheath and as I said, it has slipped out of here in the past. I have now re-made the plug and will let you know if it reoccurs
We buy them by the bucket load (at a decent price) for spares when PAT'ing - for us, they are solid and they last.Why are MK plugs 8 times the price of a standard screwfix plug??
Do people use them?
Why could it not be a faulty cable clamp?
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