"chester" wrote in message
...
OK complicasted question, maybe...

I am wiring my (large) shed now, and have decided to do two dedicated
circuits.

1 Circuit will be a single 20A/120V for all the outlets and lighting. It
will be GFCI-protected at the house-when the wiring exits the house, I
simply added an outdoor GFCI outlet, and put the shed load out of this
outlet. So all the outlets, and lighting in the shed will run off this
circuit. Easy enough...

I think that this is a mistake. I run some pretty heavy loads in my garage.
Sharing the circuitry with god only know what else could cause tripping of
the gfci


BUT, I also am wiring 240V out there-for a 240V-2000W in-wall electric
heater. I am assuming I need to GFCI-protect this line as well, but
maybe I don't. I know the heater itself has a breaker in it (dunno if
that is GFCI or not?),but do I need to protect the line from the house
(buried 12-24" down in the ground)? I would think I need to, but maybe
in-wall heaters do not need to be on GFCI circuits, and/or maybe the
buried cable does not need to be protected with GFCI? Thanks for the help
c

There are several critical pieces of this puzzle that are not included.

What is the distance to the new loads? My calculations say that your new
load (heater) must be less than 145 feet total wire length. Fixed pieces of
equipment are not required to be gfci protected. That does not mean that it
is not a good idea. Any flammable liquids out in the new area?

Other threads seem to indicate that you already bought the wire. Was the
wire UF cable? NM as far as I know is not rated for direct burial.

Not knowing the path of the electrical run and the use of the area. 12
inches could be to shallow. 24 would be fine in all situations.