Electrician Talk banner
21 - 40 of 52 Posts

·
Hackenschmidt
Joined
·
12,636 Posts
Would that qualify as a disconnect?
Yes. I can't think of a reason you couldn't cord and plug connect a furnace. I think people do it so they can run it off an extension cord to a portable generator. A while back there was discussion of wiring an inlet on a DPDT switch to switch between utility power and inlet / generator power.
 

·
Registered
Residential, lite comm., Industrial
Joined
·
1,202 Posts
Let me throw in a boomerang. Where does the code require overcurrent protection? At the point where the conductor
receives it's supply. (which your downstream wiring doesn't). 240.21
so the UPS s you use dont have a small cct breaker?
and the original breaker feeding it isnt sufficient protection?
 

·
I like ceiling fans & EMT
Former commercial, occasional (small) residential
Joined
·
1,335 Posts
Yes. I can't think of a reason you couldn't cord and plug connect a furnace. I think people do it so they can run it off an extension cord to a portable generator. A while back there was discussion of wiring an inlet on a DPDT switch to switch between utility power and inlet / generator power.
I've done some commercial/industrial work where a disconnect was required and again we would just use a cord and plug. But this was subject to OSHA and the fire marshal, not permit inspectors.
 

·
Registered
Residential, lite comm., Industrial
Joined
·
1,202 Posts
That's what i was wondering. With the ups plugged in then the ups breaker takes care of the situation but as its a standard receptacle there is a possibility you could back feed it with anything you like.
so to play devils advocate ....
what amp breaker is currently feeding it?
do you have any 115V receptacles on a cct that has a higher amp than that?

if no .... somebody would have to work really hard to mess it up
kinda like intentionally putting all of the 120V ccts on the same phase in the panel
it can be done but it is difficult, not to mention wasteful
 

·
Registered
Water treatment plant maintenance
Joined
·
756 Posts
The old ups for the plant computer was hooked up via a male cord end hanging out of a box on the wall, if it's good enough for government work why not...

I've seriously considered wiring a plug and cord into my furnace as well as my parents. That way it could be ran to a small generator in case of a long duration power outage during winter. Code or not, it makes sense to me.
 

·
Registered
Residential, lite comm., Industrial
Joined
·
1,202 Posts
The old ups for the plant computer was hooked up via a male cord end hanging out of a box on the wall, if it's good enough for government work why not...

I've seriously considered wiring a plug and cord into my furnace as well as my parents. That way it could be ran to a small generator in case of a long duration power outage during winter. Code or not, it makes sense to me.
that is still done around here for central gas heat
 

·
Super Moderator
Camera and Access control specialist.
Joined
·
4,034 Posts
this reminds me...i was just asked to cord/plug a furnace. totally unrelated but reminded me nonetheless lol
That's actually legal in Ontario.
Font Auto part Circle Parallel Diagram


I'd have no issues doing what OP wants to do. When OP moves out the inlet and outlet can be removed and connected as it would have before.
 
21 - 40 of 52 Posts
Top