I have just got 4off Crest CA12 and in the specs it says each will draw about 23A at 110V at continuous (1/3 max) power. 2 came with plugs on the end and 2 came with the caravan type plugs which are then fed to a normal plug.

Does that mean it will draw approx 11A at 240V? If so could I use a 30A ext lead and plug 2 into 1 socket or do they need to be kept separate for power or interference reasons.

Lastly how much power do typical commercial premises have on the ring main before it will trip the fuse?

What would be the best way of plugging these in. Do the big 10k+ rigs ecer have power problems? Do they bypass the fuses?

Any advise appeciated. Cheers