Re: Direct Vent Fireplace Install Electrical question
The electrical demand of a direct vent fireplace is not great; the only thing that uses power is the blower. Typically less than a few amps. However, it is considered a hardwired, permanently installed appliance by the National Electrical Code, and therefore must be on a dedicated circuit that can be locked out for servicing.
Note that the requirement for a dedicated circuit has nothing to do with the load, but with regard to the disconnecting means. When an appliance is hardwired and permanently installed, you must be able to disconnect the power to that appliance without affecting other appliances or circuits.
If an appliance is designed with a cord and a 15A plug, the manufacturer intends it to be plugged into a standard branch circuit unless the manufacturer specifies a dedicated circuit. The plug serves as the disconnecting means.
The low-voltage wiring is for a switch or thermostat to control the fireplace. Many fireplaces do not require 120V for operating the flame; they will have a pilot light and a thermopile that generates the electricity to power the fuel solenoid valve. The 120V is typically only to power the blower.
Last edited by Fencepost; 09-08-2015 at 06:37 PM.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.