On 3/10/2017 2:12 PM, DerbyDad03 wrote:
I watched a video in which a "15 year HVAC tech" added a 3 prong appliance cord
to the furnace and installed a dedicated receptacle after the furnace switch. The purpose
was so that the furnace could just be unplugged from the receptacle and plugged into a
standard extension cord from the generator. Based on what you just said, that not only
doesn't sound legal, but it also ungrounds the furnace unless the generator is grounded
in some other manner, correct?


While technically not to code, our local electrical inspector would look the other way if the receptacle was mounted in a grounded metal electrical box on the furnace cabinet. The electrical box had to be mounted using 10-32 machine screws, star washers
(to ensure a good ground connection) and lock nuts.