I would think this would be something that could easily be Googled, but I've tried and can't find it.
We have a Trane XL-80 gas furnance and when we had an insulation guy checking out the furnace, he remarked that the furnace switch in our furnace closet should really be an SSU switch with a fuse in it. I forgot to ask him what amperage fuse to use. Anyone know?
Best Answer
The switch is based on the load, but since the furnace is a dedicated circuit what size breaker is the unit on? I would guess a 15 amp but I haven't seen a gas furnace with anything larger than a 20 amp the switch must have a labeled on /off position but other than that a standard switch is fine.