For an emergency power system subject to OSHA 1910.308(b)(1), emergency and ordinary lighting circuits are proposed in the same raceway. No suitable common circuit element or normal-to-emergency transfer exception applies. What is required?
- AShare the raceway whenever insulation colors differ.
- Keep the emergency wiring independent rather than sharing that raceway.
- CShare it whenever the circuits have equal voltage.
- DShare it whenever the raceway has spare fill capacity.
Where to look it up
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.308
Why B is correct
The provision requires independent emergency wiring, with the stated exceptions. Those exceptions are excluded here. The complete textual arrangement replaces the missing diagram.