Check with your local electrical inspector.
If done properly, ours said it was legal and safe to do the plug and
His only recommendation was to use a 12 gauge appliance cord set, proper
strain relief (not romex clamp) and a high-quality 20 amp receptacle.
Nothing - but it has an awfull lot to do with why one might use a 20
amp cord/plug. As far as the code:
422.16 Flexible Cords.
(A) General. Flexible cord shall be permitted (1) for the
connection of appliances to facilitate their frequent interchange
or to prevent the transmission of noise or vibration
If you have a "compliant coupling" on the ductwork to eliminate
vibration, the flexible cord is allowed under the code for the same
reason.. Immaterial that the rigid gas line passes vibration to the
house. No inspector can say FOR SURE that the cord is not there for
vibration reasons - and if it is allowed for that purpose there is no
SAFETY reason for denying it - hense the overlooking of the
"infraction" by so many inspectors.
On 2/3/2012 7:09 PM, firstname.lastname@example.org wrote:
I don't think too many inspectors would consider a typical oil burner as
producing noise or vibration as a reason to use a flexible cord. Second,
you left out half of the article. The half where it clarifies the use of
cords on appliances. If you're going to try and twist and tweak the
code, at least furnish all the information
You want your furnace crapping out because of a cheap piece of junk
outlet that barely holds the plug in place?
Yes, the cheap 50 cent outlets you find at McLowes are code compliant
but they're still junk. You won't find one in my house.
Your furnace is plugged into an outlet? Never seen that.
The $.50 outlets (are they that expensive now?) aren't all that bad for places
where there are few insertion cycles. Kitchens, hallways, and the like where
they're used a lot, should have spec or even hospital grade outlets.
Not now -- but that situation (furnace pluged into an outlet) is what
I *WANT* -- so when the neighborhood power goes out, and it's 15F outside,
I can UNplug the furnace from the wall and PLUG it into a heavy-duty
extension-cord that goes to my little electric generator -- which I'd
run for half an hour every two hours or so to keep the house warm and
(via 2nd extension cord to the generator) the refrigerator cold.
On 2/6/2012 9:56 PM, email@example.com wrote:
I'm not convinced that putting a plug and cord on a gas furnace is
unsafe. Yah, I know, Barney Fife says it violates some NEC rule but is
it actually unsafe?
Besides, most of us are not exactly flush with cash right now.
You miss the point entirely.A typical residential central heating system
is fed with a 15 amp circuit. Despite the Nec violation in connecting
the appliance with cord and plug, it is also a Nec violation to install
a 20 amp outlet on a 15 amp circuit. It has nothing to do with the
quality of the receptacle itself, or the cord for that matter. There are
extremely high quality 15 amp receptacles, and hard service cords rated
for 15 amp as well. Any electrical inspector would know this.
I went thru the same process.
Prevailing opinion is that devices permanently attached to the structure
must be permanently wired. Heating system seems to be permanently attached.
Reading the NEC, it appears that's what it says.
So, I went down to the permit office and talked with the inspector.
He said, "no problem; putting a socket in the box and plug on the wire
will pass my inspection".
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