On 04/06/2019 15:35, Dave Plowman (News) wrote:
In article ,
newshound wrote:
I discovered that after putting MK plugs and sockets into a mate's
"light industrial" application with 3 kW immersion heaters running
typically for up to 12 hours. (Having plugs and sockets added
flexibility when elements or controllers failed). Since going over to
the standard 16A industrial plug and socket (no switch or fuse) there
have been no problems at all.

A 13 amp getting hot is often down to a poor fuse connection. If you have
one that does, try cleaning the fuse and contacts, making sure they give a
tight fit.


I have heard tell that some people with welders solder a length of thick
copper wire across the fuse clips in the plug top.

Bill