NEC Violations



240.21(B)

Main overcurrent protective devices (OCPDs) shall be equipped with circuit breaker handles in the "ON" position if supplied only by a feeder circuit breaker (i.e., reverse feeding).

240.85(5)

OCPDs shall not be located where they are exposed to physical damage. The main breaker is located at the bottom of the panel, which is a vulnerable location.

240.82(A)

OCPDs shall be marked to indicate their rated current and nominal voltage. The main breaker is not labeled with its line and load sides.

250.28(A)

The grounding electrode system shall be connected to the grounded conductor of the service at the service disconnecting means. The transformer is not grounded to the service panel.

450.43(D)

Transformers shall be equipped with a permanent label indicating the primary voltage, secondary voltage, and kVA rating. The transformer is not labeled.

Safety Concerns: If the main breaker trips, the transformer will continue to be energized on its primary side, posing an electrical hazard to personnel working on the transformer. If the transformer faults, the fault current will flow through the main breaker and potentially damage it, resulting in a loss of power to the entire facility. The unmarked main breaker poses a safety risk because it is not clear which terminals are line and load, increasing the likelihood of accidental contact with live conductors. Flag for review