Re: Modern MK Safety Plug. Not impressed
Elderly Duraplug to be binned- this one is old enough for 'red/green/black' lettering to be moulded into the black part, and also shows signs of abuse- bent pins, and the usual lazy cut-out to the white part caused by the fitter failing to thread it onto the outer sleeve!
I took this one off a B&D jigsaw primarily because the blue and brown insulation was exposed, but the whole plug is just scrap. Looking at the inside note the pitch black coating of what is presumably sulphide, covering the fuse caps, the bronze hooks into which the fuse (just about) locates, (one of the many copper sulphides?) and the black deposition in the white part of the plug demarcating the ends of the fuse holder. The copper multi-core conductors had also gone black at the ends- but this might just be deposition from the silver attack.
Silver sulphide is a fairly non-invasive corrosion, but as far as the fuse is concerned it appears to have eaten ALL the silver plating. Must be lots of free sulphur in this (vulcanized?) plug- the black part of which has started to distort.
Check old Rubber plugs!
Dave
|