I agree with Jazz.

My own setup is:
- Consumer unit with dedicated 32A MCB, routed to
- 45A DP Isolation Switch (near work area), routed to
- Emergency Stop contactor, routed to
- Distribution point (small metal electrical cabinet, with 3 buss bars, I made it but a cheap 4 or 6 way domestic consumer unit would suffice too and give option of individual fuses/MCB).

The earth buss in that cabinet is my star point. Power to everything comes from there.

Lathe VFD is wall mounted and fed from there
Control box under desk is fed from there,
PC is fed from there.
Mill starter contactor fed from there.

Lathe and Mill chassis are earthed back to there.

Mill (currently non-VFD) motor and mill head individually earthed back to mill chassis (star of stars) so I dont rely on bolted joints to make earth connections

There is a seperate 'normal' spur off the main Consumer unit for powering other intermittent stuff like soldering irons, the bench grinder, and the fan heater!


When I eventually finish my new workshop I'll transfer this pretty much as-is except everything will come from the distribution point which I will replace with a 6-way RCD consumer unit to provide local isolation/fusing. The existing Isolator will stay in the garage and the armoured cable to the workshop will feed from there.