DIYbanter - View Single Post - GFCI Circuit protection question-outdoor wiring

wrote:
On Mon, 26 Sep 2005 19:30:30 GMT, HorneTD
wrote:

The higher voltages cannot be derived from the same circuit without
installing a transformer so the code language permits you to avoid that
bit of expense and complexity. The code language on which you are
relying is meant to allow separate circuits for such purposes as
powering a large item of equipment that requires a completely different
voltage such as 240 volt delta three phase with one phase grounded to
run a large refrigeration unit. You need the 240 / 3 phase power for
the refrigeration unit and you need 120 volt power for service
receptacles and lighting. Since 240 volt delta is much cheaper to
install as corner grounded delta the cost effective way to provide both
voltages is to run two circuits. Another example is a guard house for
an industrial complex that has 480/277 volt air conditioning and
lighting together with 208/120 volt power for receptacles. In short
those exceptions are only intended to be applied were a single branch
circuit or feeder cannot supply the needed power.

That is not what the code says. In fact the handbook shows a combo
NEMA 5-15 and 6-15 device in the example.
(a duplex receptacle with a 120 and a 240 outlet)

Which example for which section?
--
Tom Horne

Well we aren't no thin blue heroes and yet we aren't no blackguards to.
We're just working men and woman most remarkable like you.