Re: Clearance above panel
Don, 110.26(A) refers to equipment operating at 600 volts, nominal, or less to ground and likely to require examination, adjustment, servicing or maintenance while energized. Doesn't a disconnect fit this description? It also refers, for dimentions, to 110.26(A)(1),(2)and (3). I don't see anything in these articles that limits the requirements to switchboards, panelboards, distribution boards or motor control centers. I do see those listed in 110.26(F)for dedicated equipment space. What am I missing here? 110.26(A)(3)says work space shall be clear and extend from grade, floor or platform to the height required by 110.26(E). I have routinely seen installations of pipe, HVAC ductwork or storage shelving over a disconnect in a mechanical room get dinged for violating the clear working space article and never questioned it.