In article ,
Dave Plowman (News) wrote:
In article ,
Adrian Brentnall wrote:
HI Folks
As the subject says - can't seem to find a contact that operates off
12volts on the coil, and is rated to switch 40+ amps @ 240v a/c.

Does such a thing exist - or do I have to use a a slave relay from the
12v to switch a 240v coil?


Try a standard car relay? Costs a couple of quid. See if it survives.
Obviously, take safety precautions in case it doesn't. But assuming it is
in a suitable housing for safety purposes, chances are it will be OK.

I'd be dubious about puttting mains voltage into a car relay. I'd be
unhappy about the insulation.
You certainly could get relays to do the job, I've used them on projects,
but switching 40A is probably a bit much for any of them. I think you are
into the 'contactor' realm.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle