Tim W wrote:
Pete Verdon wibbled on Tuesday 15 December 2009 02:47

Switching my welder on occasionally trips the MCB on my shed socket
circuit. I didn't own a welder when I designed the shed supply, but I'm
very glad I used separate circuits with all protection (except for the
cable itself) locally.

In which case, it's also worth designing the system to accept a type C
breaker (slightly lower L-E loop impedance required). That would help.

True - it's a standard small CU so I could easily replace the MCB with a
type C one. But trips are rare enough that I don't think I'll bother.
Thanks for the idea though - hadn't occurred to me for some reason.

Pete