General Order 128
Requirements for Supply Systems
The following rules cover construction requirements for supply
systems. These rules are supplemented, in certain cases, by rules in other
sections. Supply systems installed under these rules consist of, but shall
not be limited to cables, conductors, fused devices, switches, transformers
and associated equipment installed underground, on the surface and in buildings
and may be buried or placed in ducts, conduits, manholes, handholes or a
combination of these elements.
Terminating and access points for a supply system may be above or below ground and may be on or in buildings.