I just had a new Sear dryer delivered and hooked it up per the
instructions. For a four wire service, it calls for neutral to be
bonded to green at the dryer. I didn't want to do that (it violates NEC
and good engineering practice), so I didn't hook up the neutral, and
connected green to the chassis. There's about 1A on green when the dryer
is running. The dryer is made by Samsung.
This is a brand new product, current model. This is exactly the sort of
improper wiring that can put noise on the power system (and in our radios).
I haven't yet opened it up to figure out if I can fix the internal
wiring to connect that 120V load between one phase and neutral, nor have
I looked for RF noise. As I understand NEC, it is illegal to draw load
current on the green wire, but they are clearly doing that, most likely
to run a 120V motor.
Does anyone know if there is some exception to NEC that permits this?
73, Jim Brown K9YC
RFI mailing list