Mains, PSUs and other goodies.

[JAZZCNC]

As to the first question about the current for the spur, no idea. I am not aware of any seperate fuse for this so I guess it's just a matter of checking the fuse for the ring downstairs.

Well in this case like I say you need to find out for sure because in this case the whole house is pulling off it and you could be stuffed unless you turn off everything else in house.!!

As for other comments about lights dimming on startup, is that a feature of a particular piece of equipment and can it be avoided?

This would indicate a really high initial draw so could be large transformer or dodgy motor pulling high Amps.? Could be many reasons.!
My lights don't dim and I run high power transformers and large motors with high power draw on startup like my big compressor.! There's many times I'm running CNC machine while I'm using Lathe with mechanical saw cutting in background and compressor kicking in & out blowing chips form machine, sometimes I even have extractor going at same time.