Just been sat in the workshop doing a few little jobs, and there's a funny small of something getting too warm. I've noticed it on and off for a couple of days, thought it was the wood burning stove in the other room yesterday, but tonight, it's definitely coming from round the computer area.... immediate investigation required.
After a couple of mins I found it.
There's an extension block connected to the output from a UPS. It's warm. Damn warm....
Further investigation shows the neutral has been overheating. I've disconnected it here. The wire has been soldered! Never, ever solder a mains cable (or any stranded cable for that matter) before fitting it into a screw type fitting. The solder "creeps" up the cable, and leaves a resistive loose connection behind.
This lead was carrying less than 500W ... so nowhere near maximum load.
I wonder how many more of this brand I have?
Not many I hope. This one's for the bin...