Master Electrician Exam (NEC)Special Occupancies, Equipment, and ConditionsMedium
A master electrician is installing a new manufactured building that will be used as an office. The building is designed to be relocated at a later date. According to NEC, where must the feeder assembly for this manufactured building terminate?
- ADirectly at the main service disconnect of the building
- BAt a readily accessible junction box or panelboard located within 30 feet of the building
- CAt a permanently installed panelboard within the building
- DAt a permanently mounted junction box on the exterior of the building
Show answer & explanationAnswer & explanation
Correct answer: D. At a permanently mounted junction box on the exterior of the building
NEC Section 545.10 specifies that the feeder assembly for a manufactured building shall terminate in a permanently mounted junction box or panelboard on the exterior of the building. This provides a clear and accessible point for connecting and disconnecting the feeder when the building is relocated.
Why the other options are wrong
- A. Direct termination at the main service disconnect is not the specific method required for the feeder assembly of a manufactured building; an exterior junction box or panel is needed.
- B. While accessibility is important, the junction box or panelboard must be *on* the exterior of the building itself, not merely within 30 feet of it.
- C. Termination inside the building does not meet the requirement for an exterior, permanently mounted termination point for the feeder assembly.
Manufactured Building Feeder Termination
The required location for the termination of the feeder assembly supplying a manufactured building, as specified by the NEC, to facilitate connection and disconnection.
- Applies to manufactured buildings.
- NEC Article 545 covers this.
- Ensures accessibility for relocation.
Memory trick: Manufactured box, feeder's end, on the exterior wall, a trusty friend!