An acceptable location for the disconnecting means required for all ungrounded conductors includes which of the following?

• A. Inside the building
• B. Outside the building
• C. Where the conductor passes through the building
• D. All of the above

Answer: (D)

The key idea is that a disconnecting means for ungrounded conductors just has to be readily accessible and able to disconnect all the ungrounded conductors feeding the equipment. Because that requirement is about accessibility and the ability to shut off all hot conductors, the physical location can vary. It’s acceptable to place the disconnect inside the building, outside the building, or at the point where the conductors pass through the building, as long as you can readily reach it and it can simultaneously disconnect all ungrounded conductors. So any of these locations satisfy the requirement.