6" curb and 110.26(A)(1)

[AZElectrical]

I have a situation where an enclosed breaker is proposed to be installed on the exterior of a structure. The structure is fully enclosed by a 6" curb for spill containment purposes. Distance from the structure to the curb is three feet along the entire perimeter. The depth of the enclosed breaker is 6", which would put the distance from the front of the breaker to the curb at 2.5 feet. No other space requirements are in question, the structure is outside and the curb is the only issue. Does the 6" curb present enough of an intrusion that it violates 110.26(A)(1)?

 

[jxofaltrds]

I have a situation where an enclosed breaker is proposed to be installed on the exterior of a structure. The structure is fully enclosed by a 6" curb for spill containment purposes. Distance from the structure to the curb is three feet along the entire perimeter. The depth of the enclosed breaker is 6", which would put the distance from the front of the breaker to the curb at 2.5 feet. No other space requirements are in question, the structure is outside and the curb is the only issue. Does the 6" curb present enough of an intrusion that it violates 110.26(A)(1)?

(1) Depth of Working Space. The depth of the working
space in the direction of live parts shall not be less than that
specified in Table 110.26(A)(1)

Not sure if it would bother me. But I would like to see it.

Sounds like a trip hazard even if it were 3' 6" away!

 

[Cow]

Personally, I'd run it through inspection as is. If the inspector flags it, I wouldn't say I was surprised, I'd just build a little platform to stand on high enough to clear the curb. I don't really think you're gaining anything with a platform but it would pass code. We've had to do this for exterior chiller disconnects where conduit ran out the bottom and right in front of the disconnects on the ground.

 

[dana1028]

I have a situation where an enclosed breaker is proposed to be installed on the exterior of a structure. The structure is fully enclosed by a 6" curb for spill containment purposes. Distance from the structure to the curb is three feet along the entire perimeter. The depth of the enclosed breaker is 6", which would put the distance from the front of the breaker to the curb at 2.5 feet. No other space requirements are in question, the structure is outside and the curb is the only issue. Does the 6" curb present enough of an intrusion that it violates 110.26(A)(1)?

RE: the 'spill containment' - these are typically hazardous waste/or material type of containments [chemical spill, oil spill, etc.]....when things go wrong the material(s) spill into this containment area.....now....how do you access this electrical equipment?...is this elect. breaker something you may need to access and disconnect equipment under the 'spill' conditions?

Are chemicals already stored in this 'spill' containment area....just waiting for that bad day? [just something I've encountered in the past].

 

[masterinbama]

A piece of aluminum grate fastened in such a manner as to be flush with the curb and wide enough to satisfy working space width requirements would do.