NFPA Journal - Spring 2023 - 33
In Compliance
the vehicle itself. It is important to
note this, because there is other EV
equipment available that permits
power to export from the vehicle
back to the premises wiring system.
Equipment that has the ability to both
charge the vehicle and induce power
back to the premises wiring from the
vehicle is commonly referenced as
bidirectional EVSE. Regardless of the
type of equipment utilized, proper
installation and maintenance is a critical
piece in fire prevention.
From an EVSE installation
perspective, the manufacturer's
instructions and Article 625 of NFPA
70®
, National Electrical Code®
(NEC®
),
provide many of the requirements
necessary for safe installation. The
scope of Article 625, Electric Vehicle
Power Transfer System, covers the
electrical conductors and equipment
connecting an electric vehicle to
premises wiring for the purposes of
charging, power export, or bidirectional
current flow. Part III of Article 625 is
specific to installation. Some of the key
requirements include:
* Each outlet that supplies EVSE rated
greater than 16 amps or 120 volts
must be supplied by an individual
(dedicated) branch circuit. In cases
where an energy management
system is utilized to manage the
EVSE load or where the EVSE has
adjustable ampere settings, multiple
EVSE maybe served from a
single branch circuit.
* EVSE that is rated more than
60 amps or more than 150 volts
to ground must have a readily
accessible disconnecting
means installed.
* The point of connection coupling
means, which is used to connect
the EVSE to the vehicle itself, must
be installed 18 inches above the
floor level for indoor installations
and 24 inches above grade level for
outdoor installations.
* All receptacles installed for the
connection of EVSE must include
ground-fault circuit-interrupter
(GFCI) protection.
When it comes to preventative
maintenance of EVSE, the latest edition
of NFPA 70B, Recommended Practice
for Electrical Equipment Maintenance,
provides helpful information. Chapter
34 of NFPA 70B specifically covers
electric vehicle charging systems. One
major component of NFPA 70B is that
where EVSE is installed, a maintenance
program should be developed and
utilized for it. The EVSE maintenance
program should be planned at the
time the system is installed to ensure
the greatest level of safety to the
maintenance worker and the highest
level of reliability and safety to the
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NFPA Journal - Spring 2023
Table of Contents for the Digital Edition of NFPA Journal - Spring 2023
Contents
NFPA Journal - Spring 2023 - Cover1
NFPA Journal - Spring 2023 - Cover2
NFPA Journal - Spring 2023 - 1
NFPA Journal - Spring 2023 - Contents
NFPA Journal - Spring 2023 - 3
NFPA Journal - Spring 2023 - 4
NFPA Journal - Spring 2023 - 5
NFPA Journal - Spring 2023 - 6
NFPA Journal - Spring 2023 - 7
NFPA Journal - Spring 2023 - 8
NFPA Journal - Spring 2023 - 9
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NFPA Journal - Spring 2023 - 16
NFPA Journal - Spring 2023 - 17
NFPA Journal - Spring 2023 - 18
NFPA Journal - Spring 2023 - 19
NFPA Journal - Spring 2023 - 20
NFPA Journal - Spring 2023 - 21
NFPA Journal - Spring 2023 - 22
NFPA Journal - Spring 2023 - 23
NFPA Journal - Spring 2023 - 24
NFPA Journal - Spring 2023 - 25
NFPA Journal - Spring 2023 - 26
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NFPA Journal - Spring 2023 - 30
NFPA Journal - Spring 2023 - 31
NFPA Journal - Spring 2023 - 32
NFPA Journal - Spring 2023 - 33
NFPA Journal - Spring 2023 - 34
NFPA Journal - Spring 2023 - 35
NFPA Journal - Spring 2023 - 36
NFPA Journal - Spring 2023 - 37
NFPA Journal - Spring 2023 - 38
NFPA Journal - Spring 2023 - 39
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NFPA Journal - Spring 2023 - Cover3
NFPA Journal - Spring 2023 - Cover4
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