1. Fire barriers ensure compliance with regulatory fire safety standards, safeguarding switchyards from the economic and operational risks associated with transformer fires.

National Electrical Code (NEC) Sec. 408.3 helps take electrical safety for service entrance panels to a new level. The 2017 NEC includes provisions to provide shock protection via panelboard barriers.

Barriers would not be required on any load side busbars or load terminals of the other circuit breakers in the panelboard because they would not be energized if the main breaker was off. Ironically, ...