OSHA last issued rules for the construction of transmission and distribution installations in 1972. No, that's not a misprint. 1972! Roughly 42 years later, they decided it was finally time to revise the construction standard to make it more consistent with the general industry standard.
The final rules for general industry and construction now include new or revised provisions on host employers and contractors, training, job briefings, fall protection, insulation and working position of employees working on or near live parts, minimum approach distances, protection from electric arcs, deenergizing transmission and distribution lines and equipment, protective grounding, operating mechanical equipment near overhead power lines, and working in manholes and vaults. The final rule also revises the general industry and construction standards for electrical protective equipment.
Why did it take them more than 40 years to revise this standard?