90.2 NEC Scope.
Code Change Summary: New requirements added to existing text. The following installations are now covered by the rules in the NEC:
- Installations supplying shore power to ships and watercraft in marinas and boatyards
- Installations used to export electric power from vehicles to premises wiring or for bidirectional current flow.
For many code cycles, the NEC® has had requirements in Article 555 for installations of shore power related to marinas and boatyards, but the actual scope of the NEC® in Article 90 made no mention of it. In the 2020 NEC®, Item 5 was added in Section 90.2(A) to specifically mention that these types of installations are in fact covered by the NEC®.
In addition, line item 6 below was added for newer types of Electric Vehicle (EV) charging installations which can export excess electric power from the EV to the premises wiring system or for bidirectional current flow back to the grid.
Below is a preview of the NEC®. See the actual NEC® text at NFPA.ORG for the complete code section. Once there, click on their link to free access to the 2020 NEC® edition of NFPA 70.
2017 Code Language:
90.2 Scope.
90.2(A) Covered.
This Code covers the installation and removal of electrical conductors, equipment, and raceways; signaling and communications conductors, equipment, and raceways; and optical fiber cables for the following:
(1) Public and private premises, including buildings, structures, mobile homes, recreational vehicles, and floating buildings
(2) Yards, lots, parking lots, carnivals, and industrial substations
(3) Installations of conductors and equipment that connect to the supply of electricity
(4) Installations used by the electric utility, such as office buildings, warehouses, garages, machine shops, and recreational buildings, that are not an integral part of a generating plant, substation, or control center
2020 Code Language:
90.2 Scope.
90.2(A) Covered.
This Code covers the installation and removal of electrical conductors, equipment, and raceways; signaling and communications conductors, equipment, and raceways; and optical fiber cables for the following:
(1) Public and private premises, including buildings, structures, mobile homes, recreational vehicles, and floating buildings
(2) Yards, lots, parking lots, carnivals, and industrial substations
(3) Installations of conductors and equipment that connect to the supply of electricity
(4) Installations used by the electric utility, such as office buildings, warehouses, garages, machine shops, and recreational buildings, that are not an integral part of a generating plant, substation, or control center
(5) Installations supplying shore power to ships and watercraft in marinas and boatyards, including monitoring of leakage current
(6) Installations used to export electric power from vehicles to premises wiring or for bidirectional current flow