Where should the disconnecting means for a heat pump unit be installed?

• A. Within sight of the unit and readily accessible
• B. In the main service disconnect enclosure
• C. On the opposite side of the building
• D. In a locked exterior box

Answer: (A)

The important point here is that the disconnecting means must be easily found and operated so power to the heat pump can be shut off quickly for service or emergencies. Placing the disconnect within sight of the outdoor unit and readily accessible ensures a technician can see and reach it at a glance, without climbing stairs, opening locked gates, or walking around to remote boxes. This reduces the time to de-energize and improves safety.

Other locations would slow or block access: putting it in the main service disconnect enclosure can still be accessible, but it isn’t guaranteed to be in view of the unit, which slows identification. Locating it on the opposite side of the building or in a locked exterior box would impede quick access, defeating the purpose of having a readily accessible shutoff.