I seem to recall someone posting a NEC reference other than 400.8 or a UL reference prohibiting using a cord & plug as a disconnecting means for a gas fired central heat unit/air handler. Any input ?
I seem to recall someone posting a NEC reference other than 400.8 or a UL reference prohibiting using a cord & plug as a disconnecting means for a gas fired central heat unit/air handler. Any input ?
How about ANSI Z21.47. Cord and plug is not allowed on gas furnaces. I believe UL refers to this standard.
How about ANSI Z21.47. Cord and plug is not allowed on gas furnaces. I believe UL refers to this standard.
Specifically how does the NEC address this, is it just about the listing? There are some things the NEC specifically disallows is this one?
After I read UL LFZE, I sent a message to Mgaw stating I could not find wording specifically prohibiting C&P. So if it helps your feelings :grin: it wans;'t accepted at face value :grin:And folks didn't want to accept "UL Question Corner" as a source when I posted it ... ."
THAT particular UL answer is, unfortunately, misleading. It refers to electric heating equipment - NOT to gas equipment that might have but an electric igniter, blower, or circulating pump. Nor does it address the humidifiers, air cleaners, etc., that are also often accessories to the HVAC system. The UL spokesman quite carefully dodged the general question.
UL has recently clarified this point -at least regarding pumps- with a revision to one of their product standards (cord & plug is OK, within limits).
From the dishwasher and water heater discussions, I think it's safe to say that if something comes with a cord & plug, then that method is fine.
As for your installing a cord & plug for such an igniter, I think the issue is still unresolved. Personally, I'm inclined to say "no problem."
After I read UL LFZE, I sent a message to Mgaw stating I could not find wording specifically prohibiting C&P. So if it helps your feelings :grin: it wans;'t accepted at face value :grin:
I agree that factory installed or accepted cord & plug is no problem. I lean toward 400.7(A)(8) not allowing it (therefore a violation of 400.8) in this case, but I'm trying to give the E/C benefit of the doubt.
Check Art. 422