ICC Residential Electrical Inspectors Practice Exam

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

1. At the main electrical panel

2. Within line of sight of the unit and readily accessible

3. In an adjacent room

4. Anywhere in the vicinity of the unit

The correct answer is: Within line of sight of the unit and readily accessible

The correct installation location for the disconnecting means for a heat pump unit is within line of sight of the unit and readily accessible. This requirement is important for several reasons. First, it allows anyone operating or servicing the heat pump to quickly access the disconnect during maintenance or in the event of an emergency, such as an electrical fault. Having the disconnect within line of sight ensures that the person operating the switch can see the heat pump, providing a safety measure that reduces the likelihood of accidental energizing of the equipment without the operator's knowledge. Additionally, this placement complies with the National Electrical Code (NEC), which emphasizes safety and accessibility for disconnects associated with equipment like heat pumps. The other options do not meet these crucial safety and accessibility standards. For instance, having the disconnect at the main electrical panel or in an adjacent room could create a delay in shutting off power, which may result in unsafe conditions during maintenance. Similarly, stating that it can go anywhere in the vicinity of the unit does not align with the requirement for immediate access or visibility, potentially compromising safety.