FAQ

100
Material taken from the National Electric Code
®
is reprinted with permission
from NFPA 70
®
, 2023 edition. National Electrical Code
®
, Copyright 2022,
National Fire Protection Association, Quincy, MA. All rights reserved.
NEC
®
Text
Exception: Branch circuits shall be permitted to feed multiple EVSE’s as
permitted by 625.42(A) or (B)
625.42 Rating. The EVSE shall have sufcient rating to
supply the load served. Electric vehicle charging loads shall
be considered to be continuous loads for the purposes of
this article. Service and feeder shall be sized in accordance
with the product ratings, unless the overall rating of the
installation can be limited through controls as permitted by
625.42 (A) or (B).
(A) Energy Management System (EMS). Where an EMS
in accordance with 750.30 provides load management of
EVSE, the maximum equipment load on a service and feeder
shall be the maximum load permitted by the EMS. The EMS
shall be permitted to be integral to one piece of equipment
or integral to a listed system consisting of more than one
piece of equipment. When one or more pieces of equipment
are provided with an internal load management control, the
system shall be marked to indicate this control is provided.
(B) EVSE with Adjustable Settings. EVSE with restricted
access to an ampere adjusting means complying with
750.30(C) shall be permitted. If adjustments have an impact
on the rating label, those changes shall be in accordance
with manufacturer’s instructions, and the adjusted rating
shall appear on the rating label with sufcient durability to
withstand the environment involved. EVSE as referenced
shall be permitted to have ampere ratings that are equal to
the adjusted current settings.
625.43 Disconnecting Means. For EVSE and WPTE rated
more than 60 amperes or more than 150 volts to ground,
the disconnecting means shall be provided and installed in
a readily accessible location. If the disconnecting means
is installed remote from the equipment, a plaque shall be
installed on the equipment denoting the location of the
disconnecting means. The disconnecting means shall be
lockable open in accordance with 110.25
Leviton Note: WPTE stands for Wireless Power Transfer Equipment
Expert Analysis
One EVSE can consume a large portion of an electric
panels amperage, and two or more EVSE’s can exceed
the panels output. So the solution is either a very
expensive service and possibly utility upgrade, or an
energy management system that is smart enough to
alternate current to each EVSE, or limit current to each
EVSE. However the EMS doles out the juice, it does so
where it doesn’t exceed the amperage the circuit
was sized for.
continued from page 98