Sunday, March 23, 2014

Space Required for Electrical Equipment

The Space About Electrical Equipment  requirements are illustrated in the following diagrams:

Working Space.  This is the space provided around certain electrical equipment to permit ready and safe access to and egress from said equipment.  There are (3) dimensions of consideration: depth of the working space, width of the working space, and height of the working space.  Other working space considerations are found in Part (B), (C), (D), (E) and (G).

 The following figures illustrate elements of the dimensions mentioned above:

In addition to working space requirements, the NEC also mandates “dedicated equipment space”.  This is the space provided for the electrical equipment itself to ensure proper operation of the equipment, to allow for future access and expansion of the system, and to protect the equipment from damage.  The rules for dedicated equipment space can be found in Part (F) to Section 110.26.  The part is divided into “indoor” locations and “outdoor” locations.  The same three dimensions (D, W, H) are to be considered for dedicated equipment space located indoors.  Outdoor equipment have additional protection requirements to avoid accidental contact by unauthorized persons, vehicles, and leakage from piping systems.

The following figures illustrate elements of the dedicated equipment space rules:

Van Hibberts, CMI
Certified Residential Building Code Inspector ICC-5319905
Florida-State Certified Master Inspector Lic. #HI 89
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Florida-Certified Wind Mitigation Inspector
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