Electric power generation, transmission and distribution
1910.269 governs the utility side: operation and maintenance of electric power generation, control, transformation, transmission and distribution lines and equipment. It is a separate world from Subpart S, with its own approach distances, its own qualification expectations and its own culture.
The scope question
The most valuable thing to understand about 1910.269 is where it stops. Utilities and their contractors know they are in it. What catches people out is everything adjacent: the support facilities, the office buildings, the shops, and contractor work that does not touch the transmission system. Those generally fall back under Subpart S, and a programme written entirely to 1910.269 will have gaps where its own people actually work.
Why it matters for training
A crew trained exclusively to 1910.269 may be superbly prepared for line work and unprepared for a panel in a maintenance building. A crew trained only to Subpart S may be out of their depth the moment they step toward the yard. Getting the scope right decides which training each group needs.
State plan overlays
Several state plans carry additional requirements in this area, including outright prohibitions on work practices the federal rule permits at given voltages. If you operate in a state plan jurisdiction, the federal text is not the whole picture.