Minimum Height for Main Building Disconnect Swithc

[Leo1]

Excluding exceptions Article 240.24 and other areas of the NEC state the highest position for the center of a switch handle 6 ft 7 in above the working platform. Is there a minimum height for a main disconnect switch?

I have come across a 600 AMP, 240 VAC main building disconnect switch on the outside wall where the center for switch handle is about 3 ft above finish grade. I cannot find this height as a Code violation. However, directly above the main disconnect switch is an set of stairs which does violate Article 110.26 (A) (3) for a work space height of 6.5 ft or the height of the equipment, whichever is greater.

 

[augie47]

With the exception of some specific situations such as Art 551.77 there is no minimum height for disconnect means.

 

[Bwas]

I have been required to move a service disconnect up to avoid a flood plain based on a general nec reference. Can't remember the article

 

[MasterTheNEC]

@Bwas

Chances are the locality is observing various FEMA requirements for placing electrical equipment within a known flood plain. Here is a PDF (unless a MOD removes it) for a FEMA document that may assist you. http://www.fema.gov/media-library-data/20130726-1859-25045-5831/fema_isaac_ra_2.pdf

The NEC has a provision for equipment located in potential flooding areas (e.g. 517.35(C), 517.44, 695.12(C),700.10(C), 700.12, 701.12, etc.) to be considered but chances are the locality (as with the ones I am familiar with) have a local amendment that observes flood plain requirements held within the zoning department. Just depends on the stated flood plains in your area.

probably not much help but it's what I got based on my experience as an AHJ.

Edit: forgot to add. In order to comply with Section 240.24; the local jurisdiction mandates a working platform (that complies with all requirements of 110.26(A) included) be installed with a permanent fixed ladder or stairs. So its kind of a "if you building it, they must comply" kinda thing.