Plan Review and Inspections Flashcards
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Read the first 7 Plan Review and Inspections flashcards as text
A commercial electrical inspection reveals that conductors in a cable tray are not secured at the ends of the tray and at each section connector. Which NEC article applies to cable tray wiring support requirements?
Answer: NEC Article 392, which governs cable tray systems including support and installation requirements
NEC Article 392 governs cable tray installation, including requirements for securing cables at the ends and transitions.
During a plan review for a new commercial building, the engineer's load calculations show a demand factor applied to the lighting load. Under what NEC section is a demand factor permitted for commercial lighting?
Answer: NEC 220.42, which permits demand factors for lighting loads in specific occupancy types based on Table 220.42
NEC 220.42 and Table 220.42 permit demand factors for lighting loads in commercial occupancies such as stores, hospitals, and hotels.
An inspector is performing a final inspection on a commercial kitchen. The plans show a 6-foot metal countertop that is not bonded to the electrical system. What should the inspector require?
Answer: Verify whether the countertop is within 6 feet of a sink and if so, require bonding per NEC 250.104 or applicable plumbing/equipment bonding requirements
In commercial kitchens, metal surfaces near plumbing or electrical equipment may require bonding to prevent shock hazards per NEC 250.104 and related sections.
A plan review for a commercial parking garage shows lighting circuits without GFCI protection. Under which condition does the NEC require GFCI for lighting in a commercial parking structure?
Answer: GFCI protection is only required for receptacles in parking garages, not lighting circuits
NEC 210.8(B) requires GFCI protection for receptacles in commercial garages, but lighting circuits are governed by different requirements; the inspector should verify applicability.
During a service inspection, the inspector finds that the neutral conductor at the service entrance is connected to the grounding electrode system and also bonded to the equipment grounding bus in a downstream distribution panel. What is wrong with this installation?
Answer: This creates a parallel neutral path (objectionable current) and violates NEC 250.6; the neutral-ground bond must only occur at the service equipment
NEC 250.6 prohibits objectionable current on grounding conductors; the neutral-to-ground bond must occur only at the service disconnect, not at downstream panels.
An inspector reviewing plans for a commercial data center notices that the UPS bypass panel is not shown with a clear identification label on the drawings. What should the inspector require?
Answer: Require the plans to show labeling requirements for all emergency and bypass equipment per NEC 700.9 and 705.10
NEC 700.9 and 705.10 require that emergency and standby equipment be clearly identified on plans and in the field so inspectors and first responders can locate disconnects.
When performing a rough-in inspection of a multi-story commercial building, the inspector finds that fire-rated floor penetrations for conduit are not sealed. Which code authority governs this requirement?
Answer: NEC 300.21, which requires fire-rated penetrations to be sealed to prevent the spread of fire and products of combustion
NEC 300.21 requires that electrical installations in fire-rated assemblies be sealed to prevent fire and smoke spread, and electrical inspectors must enforce this requirement.