Re: Reminder: Never connect a generator to home wiring without transfer switch

[Mark Tinka <mark@tinka.africa>]

On 8/31/21 16:06, Mel Beckman wrote:

> I think you’re forgetting about the all-important blower fan in a gas-fired furnace.

Well, I was referring to a pure electric furnace, not one that uses a 
blower over a gas-fired one :-).

In that case, the blower is not a major draw on power.

But again, we don't have those things here, so :-).


> That said, the reason the code requires furnaces to be hardwired is to ensure that the blower interlock system can’t be 
> bypassed. An electrical interlock ties a heat recover ventilator to circulation air blower operation of a forced-air 
> furnace system. This ensure that the blower circulates supply and return air within the structure. A plug-in power 
> source leads to the possibility that this interlock could be accidentally defeated, resulting in an overheat within the 
> flame box.

Makes sense.

Does this, then, mean that if the blower itself were to fail, the gas 
burner would not light?

Mark.