Results 1 to 3 of 3
Thread: Service Equipment access
09-15-2009, 03:40 AM #1
Service Equipment access
How long has the NEC required the minimum 3 foot access in front of service equipment (or any panel for that matter)? [current 110.26(A)(1)]
I have a house built in the late 70's that has the water heater placed within two feet or so of the panel in the back corner of the garage (photo). I feel confident that this is the original location for both and not that the water heater was relocated sometime since original constuction.
Will write up regardless due to safety concern, but would like to get an idea on implementation of access standard (e.g., "yeah, not been allowed since the 50's" or "First implemented in NEC as of 1985").
09-15-2009, 09:46 AM #2
Re: Service Equipment access
Added with edit: Looks it it first appeared in the 1940 NEC as it is in there and not in the 1937 NEC.
Except that it was 2-1/2 feet until maybe as late as the 1962 NEC (I forgot when that changed as I looked through the old codes). Nonetheless, 2-1/2 feet or 3 feet, it was in there since 1940.
Back then, there were many distances, such as, if there were no live parts, no grounded parts (meaning air only opposite the panel) the distance was 1-1/2 feet for 150 volts or less. Of course, though, as soon as you put a wall there, there is the possibility that the wall becomes grounded, thus the clearance needs to go to 2-1/2 feet. I know some will argue that point, but that was so long ago that the argument is moot.
Last edited by Jerry Peck; 09-15-2009 at 10:06 AM.
09-15-2009, 10:08 AM #3