Big Jim,
6' 7" is the maximum height of a disconnect switch, as measured to the center of the handle in its highest position 404.8(A)
6' 6" is the minimum headroom in 110.26(E). If Edward builds an enclosure for this equipment, that will be the minimum headroom inside the enclosure. This enclosure is really going to look ugly if he opts to go that route since the inside dimensions will be a minimum of 30" wide & 36" deep(plus the depth of the breaker box). Not to mention that he'll likelyhave to install a light fixture inside.
Tom
