sfav8r
Senior Member
- Location
- San Francisco Bay Area
I always install an SSU when wiring for a furnace. I did my first one that way, and I admit I have just always done them that way without really thinking if it was required.
Today, I went to look at a home that had correction notices. One of those notices stated "Replace the unapproved furnace wiring with an electrical installation suitable for the conditions of use." When I read this I expected to see a furnace running on an extension cord. Instead I found a dedicated 20a circuit (romex) feeding a j-box mounted to the ceiling joist. There was a disconnect switch in the j-box and the furnace was feed by a drop in 1/2 flex. The room had a light and a plug within about 5'. The only thing I could think of was NO SSU. If it is required, I'm not sure what the code is.
As a side note, has anyone else noticed that HVAC guys often come and install a 20a fuse in an SSU? Seems pointless to have the SSU to me since it's on a 20a breaker.
Thanks.
Today, I went to look at a home that had correction notices. One of those notices stated "Replace the unapproved furnace wiring with an electrical installation suitable for the conditions of use." When I read this I expected to see a furnace running on an extension cord. Instead I found a dedicated 20a circuit (romex) feeding a j-box mounted to the ceiling joist. There was a disconnect switch in the j-box and the furnace was feed by a drop in 1/2 flex. The room had a light and a plug within about 5'. The only thing I could think of was NO SSU. If it is required, I'm not sure what the code is.
As a side note, has anyone else noticed that HVAC guys often come and install a 20a fuse in an SSU? Seems pointless to have the SSU to me since it's on a 20a breaker.
Thanks.