780 CMR, CHAPTER 51, ch. 4, R404, R404.4 - Wiring for Electric Vehicle Charging Spaces ("EV Ready Spaces").

Add section R404.4 as follows:

EV Ready Spaces shall be provided in accordance with Table R404.4. The branch circuit shall be identified as "EV READY" in the service panel or subpanel directory, and the termination location shall be marked as "EV READY". The circuit shall terminate in a NEMA receptacle or a Society of Automotive Engineers (SAE) standard J1772 electrical connector.

TABLE R404.4 EV READY SPACE REQUIREMENTS

Type of Building	Number of parking spaces
1 & 2 family dwellings and town houses	At least 1 per unit
Multi-family	At least 10%

Exceptions:

1. In no case shall the number of required EV Ready Spaces be greater than the number of parking spaces otherwise required by local ordinance.

2. This requirement will be considered met if all spaces which are not EV Ready are separated from the premises by a public right-of-way.

3. Any 50-ampere branch circuit may be replaced by 3 or more "EV READY" labelled 20-ampere branch circuits and terminations where sufficient spaces are available.

4. Residential structures of 1-4 dwelling units may use a 40-ampere dedicated circuit, or if necessary a 110 volt 20-ampere dedicated circuit, if a 50-ampere dedicated circuit would require the dwelling unit to upgrade the size of the electrical service beyond what would be required per the MA Electrical Code (527 CMR) for the unit if a dedicated circuit was not reserved for EVSE.

Construction documents shall identify the total service load required to serve the residential unit. If the reservation of a 50-ampere branch circuit will require an upgrade to a larger electrical service, the exception shall apply.

Notes

780 CMR, CHAPTER 51, ch. 4, R404, R404.4

Amended by Mass Register Issue 1532, eff. 10/11/2024.