Re: CQD answer published Tuesday, August 18, 2015 - Working Space Access 1
1. Regarding your answer to the Monday August 17th question regarding crawling on hands and knees under duct work to reach the panel board location: NEC 240.24 requires overcurrent devices to be readily accessible which is “capable of being reached quickly for operation, renewal, or inspections without requiring those to whom ready access is requisite to actions such as to use tools, to climb over or remove obstacles, or to resort to portable ladders and so forth. Having to crawl on your hands and knees under duct work would not meet the definition of readily accessible in my opinion.
Sincerely, Mike Bressler
2. Where access to the 1200A panel requires crawling. Some added thoughts to your excellent discussion of 110.26.
True, the path to the working space does not seem to be directly addressed, BUT I do think that the devices I assume to be in the panel (IE : circuit breakers, fused switches) must be Readily Accessible. That requirement is defined, and I think that the path must be continuous to these switching device(s). Since "operations, renewal, or inspections" are certainly required, I think that the stairs (and permanent ladders) are probably OK, but requiring crawling is not.