ICC Residential Electrical Inspectors Practice Exam

Spare positions in panelboards that contain unused ______________ shall be described accordingly.

1. circuits

2. breakers

3. fuses

4. wires

The correct answer is: breakers

When panelboards have spare positions, these positions need to be clearly described to avoid any confusion regarding their status. Using the term "breakers" is particularly appropriate because it refers specifically to circuit breakers that are installed in the panel. Circuit breakers control the flow of electricity, and having spare circuit breakers raises questions about their intended use. Designating spare positions as having unused breakers indicates that while physical slots are available, those slots do not have active breakers installed that are controlling circuits. This distinction is important for safety, maintenance, and clarity for anyone working with the electrical panel in the future. In contrast, the other terms are less specific. "Circuits" refers broadly to the paths through which electricity flows, which could include many components beyond just the breakers. "Fuses" relate to older types of protection devices and might not be relevant if the panelboard uses breakers. "Wires," while essential in the context of electrical installations, do not clearly convey the concept of an available slot in the panelboard designed for a protective device. Therefore, describing spare positions in terms of breakers provides the necessary specificity and clarity.