DIYbanter - View Single Post - Wiring 3 way switches for detatched garage lights

wrote:
So I am using the ground from the house instead of the garage? No
issues with that?

The load is in the garage. This sounds like it might work for me...any
NEC issues?

Yes that is exactly the type of parallel pathway that the code forbids
for three wire feeders. Your switching circuits do count as another
metallic pathway.

If you run all portions of the garage end of the circuit in non metallic
raceway, use all nonmetallic boxes and cover plates, and install only
non metallic lighting fixtures it might be reasonably safe. The moment
one of the non metallic switch plates or fixtures is replaced with one
that has exposed metal then your single layer of safety is gone. You
would also have to violate the code requirement that the EGCs in the
garage should be bonded to the neutral of the feeder at the building
disconnecting means.

You can use X10 controls via the feeder without violating the code.
Wireless three way switches that use radio signals to control the switch
at the light would also work.
--
Tom Horne

"This alternating current stuff is just a fad. It is much too dangerous
for general use." Thomas Alva Edison