Single or double pole fused spur

[securespark]

Some cheap Chinesey FCUs in the 90s were SP.

 

[securespark]

Went down an internet rabbit hole looking for SP FCUs.

Found this, which is all over the place:

From here: https://uk.rs-online.com/web/generalDisplay.html?id=ideas-and-advice/fused-spurs-guide

 

[securespark]

Found this on another forum:

And on the same thread, a bit of FCU shenanigans!

https://www.electriciansforums.net/threads/single-pole-fused-switched-spur.63443/

 

[winston1]

The comment someone made about the fuse size depending on the cable size and all that is all very well if you can do the maths, but your theory about the fuse being just over the current rating of the mat is absolutely fine.

There is no maths involved. Cable ratings are tabulated. Fuse ratings are on the fuse.

 

[winston1]

Found this on another forum:

View attachment 263709

And on the same thread, a bit of FCU shenanigans!

https://www.electriciansforums.net/threads/single-pole-fused-switched-spur.63443/

What an idiot! 13a sockets don’t need an upstream FCU and isolation can be achieved by pulling the plug.