(a) The rating of the overcurrent protection in the lot service equipment shall not exceed the rating of the connected feeder assembly. Lot service equipment may contain any or all of the approved receptacles conforming with section 2186 of this chapter.

(b) Lot service equipment may also contain the means for supplying accessory structures or other electrical equipment located on the lot, provided the lot service equipment is designed and listed for such application.

(c) Only one (1) power supply connection shall be made to a unit.

(d) Lot service equipment may also contain additional receptacles for supplying portable electrical equipment, provided that such receptacles are listed grounding-type receptacles. All 120-volt, single-phase, 15- and 20-ampere receptacle outlets in lot service equipment shall be protected by ground-fault circuit protection. The requirement for ground-fault circuit protection shall not apply to equipment or installations constructed, installed, or approved for construction or installation prior to September 1, 1975.

(e) When an electrical meter is installed as an integral component of the lot service equipment, it shall be of a class or rating that will accurately measure all loads up to the rated ampacity of the lot service equipment.