I was given a 13.8v Power Supply Unit at a local radio rally so thought I’d check it out, first job was the plug top, this is what I found;

I rewired the plug and used the optional extra strain relief, this was the before picture.

It was only after I put the plug back  and inspected it, that I noticed the condition of the outside of the plug and the lethal exposed conductor.

Once a new plug was fitted the PSU worked fine, just a cautionary tale, always double check everything from a rally.