Need help wiring an Furnace Emergency Switch - Houzz I need to add an emergency cut-off switch for the gas furnace at the top of my basement stairs but I don't know how to make the connection. I know it can't be that hard but I can't find anything online to help and my electrician is MIA. As you can see in my diagram, the "Emergency Switch" HVAC: How to Wire a 110 volt Furnace Switch & Furnace Click to view on Bing14:44PLEASE READ : Please Visit My Amazon Store Front for Awesome HVAC Tools at a Affordable Price Delivered Right to your Home , Every Tool in my HVAC Tool of th..Author: Fritz RochesterViews: 64K How to install the power switch for furnace - YouTube Click to view on Bing5:04This is a simple one about wiring the power to a gas or oil furnace. This video is part of the heating and cooling series of training videos made to accompany my websites: wwwcoolingmanAuthor: grayfurnacemanViews: 70K What Is a Furnace Disconnect Switch? According to building codes, a furnace must be supplied by a dedicated circuit, meaning the circuit cannot supply power to anything other than the furnace. This circuit is served by its own circuit breaker in the breaker box (properly called the main service panel) circuit wiring runs from the service panel to the disconnect switch, and from there to the furnace. How to Wire 110V for a Furnace | eHow The blower and control circuit for a modern gas furnace uses its own 110 to 125 volt circuit breaker. A single sheathed cable runs from the circuit breaker to a single-pole light switch located next to the furnace. The switch connects to the furnace inside a wiring box. The furnace uses the power Electrical wiring of emergency shut off switches — Heating Of course he messed up the wiring because the box had extra wires in it and he got confused. He assumed it was a simple box with the load and line wiring and that's it. But it turns out my house has 2 switches to turn off the furnace. One is upstairs in a foyer. The other is right next to the furnace (the switch I'm talking about that he replaced). Need for emergency cut off switch for gas furnace The "Emergency Switch" was deleted for gas fired appliances with the 2003 Version of the NFPA 54 (could be wrong on the exact edition). The line of thinking was that they didn't want the homeowner to get a false sense of security in thinking that the appliance was safe by flipping off the emergency switch. Furnace switch location - code question - RedFlagDeals Q: If the furnace switch is located in the ceiling, does it have to be moved to a wall location with 1.7 meters on retrofit applications? A: No, provided it is readily accessible for operation in the event of an emergency, is within 9m and within sight of the furnace, meets the requirements of Rule 28-604(3) and the switch is clearly identified.