In article .com,
wrote:
We often have a 100 KVA genny out for filming where mains isn't
available. And I don't *think* they sink an earth spike. They run a 45
amp (or two) circuit to a sort of rugged CU, and 15 amp circuits from
that. I'm not actually sure what sort of breakers are in that CU,
though. I'll ask on Monday.

I'm guessing that the metal frame of a 100kVA gen would make good
connection with earth without any spike.

Years ago when I worked on large OBs with gennys large enough to run
several scanners with air-con, they *did* sink an earth rod. But export
mains to remotes perhaps a mile away using a multicores - and joints -
which had mains and several video and audio circuits all in one. Makes I
laugh at the how do I get power to my shed type questions. ;-)

--
*Change is inevitable, except from a vending machine.

Dave Plowman London SW
To e-mail, change noise into sound.