In our previous issue, we mentioned that Subpart K is harmonized with the NEC. Its first subsection, 1926.400, says it addresses electrical requirements of employees involved in construction work. Note, it doesn’t say “employees of construction firms.” Whether you’re in a maintenance department or on a construction crew, 1926 Subpart K applies if you’re involved in construction work.
This subsection then tells you Subpart K is divided into four major divisions (plus definitions). The divisions are:
- Installation safety requirements.
- Safety-related work practices.
- Safety-related maintenance and environmental considerations.
- Safety requirements for special equipment.
OSHA provides the installation safety requirements in 1926.402 through 1926.408. They apply to both permanent and temporary installations. They don’t apply to:
- Permanent installations that were in place before construction began.
- Generation, transmission, and distribution (T&D) installations.
There’s a gotcha on the last one, though. If there is one piece of equipment at, say, a transmission substation and it is not specifically for T&D, then the building it’s in should most likely be reclassified as non-T&D for safety purposes (see NFPA 70E for specifics).
Before providing the actual requirements, OSHA basically says you can ignore whatever requirements it provides if your installation conforms to the NEC [1926.402(a)]. But it also says this provision is exclusive of Formal and Interpretations and Tentative Interim Agreements. And it provides a list of requirements that apply on top of the NEC.
In our next issue, we’ll look at what those requirements are.
More than 5.5 ft above the floor.