Article 110 - Requirements for Electrical Installation

[bhc]

Article 110.26E.1.a states; Dedicated Electrical Space. The space equal to the width and depth of the equipment and extending from the floor to a height of 1.8M (6ft) above the equipment or to the structural ceiling, whichever is lower, shall be dedicated to the electrical installation. No piping, ducts, leak protection apparatus, or other equipment foreign to the electrical installation shall be located in this zone. Does the Code allow for stacking of electrical equipment, such as a wall-type dry type transformer being mounted above a wall-mounted lighting panel, since these are parts of the electrical installation?

 

[dkidd]

Article 110.26E.1.a states; Dedicated Electrical Space. The space equal to the width and depth of the equipment and extending from the floor to a height of 1.8M (6ft) above the equipment or to the structural ceiling, whichever is lower, shall be dedicated to the electrical installation. No piping, ducts, leak protection apparatus, or other equipment foreign to the electrical installation shall be located in this zone. Does the Code allow for stacking of electrical equipment, such as a wall-type dry type transformer being mounted above a wall-mounted lighting panel, since these are parts of the electrical installation?

As long as you maintain working space headroom.

 

[Carultch]

Article 110.26E.1.a states; Dedicated Electrical Space. The space equal to the width and depth of the equipment and extending from the floor to a height of 1.8M (6ft) above the equipment or to the structural ceiling, whichever is lower, shall be dedicated to the electrical installation. No piping, ducts, leak protection apparatus, or other equipment foreign to the electrical installation shall be located in this zone. Does the Code allow for stacking of electrical equipment, such as a wall-type dry type transformer being mounted above a wall-mounted lighting panel, since these are parts of the electrical installation?

You can stack equipment that is the same depth, if allowed by the manufacturer. Or you can build-out the thinner equipment to match the depth of the deeper unit's front cover. It is a common violation to put a transformer disconnect on top of the transformer, and then the transformer sticks out several feet so you can't access the disconnect. Such a disconnect should be off to the side.

Dedicated space is dedicated to the electrical installation. Any equipment/raceways/wiring methods governed by the NEC, can be in this space, even if unrelated to your scope of work.

What cannot be in this space, is plumbing, gas, and HVAC.