FAQ

104
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
continued from page 102
article, ground-fault protection of receptacles and outlets
on branch circuits rated 150 volts or less to ground and 60
amperes or less, single- or 3-phase, shall be provided with a
Class A GFCI.
Exception: Receptacles and outlets that are part of listed equipment with
ratings not exceeding the low-voltage contact limit that are supplied by listed
transformers or power supplies that comply with 680.23(A)(2) shall not be
required to be provided with ground-fault protection.
Informational Note: The high leg of a 120/240-volt 4-wire delta-
connected system, and the two ungrounded phases of a corner-
grounded delta system have a voltage to ground greater than 150
volts, exceeding the limit for a Class A GFCI.
(C) Above 150 Volts to Ground. Where required in this
article, ground-fault protection of receptacles and outlets
on branch circuits operating at voltages above 150 volts to
ground, not exceeding 480 volts phase-to-phase, single-
or 3-phase, shall be provided with SPGFCI protection
not to exceed 20-mA ground-fault trip current.
Informational Note: See UL 943C, Outline of Investigation for
Special Purpose Ground-Fault Circuit Interrupters,
for information on Classes C, D, and E ground-fault
circuit interrupters
Expert Analysis
A revision has been made to clarify the requirements
for ground-fault protection to protect personnel from
shock hazards. The ground-fault circuit-interrupter
protection (GFCI) and special purpose ground-fault
circuit-interrupter protection (SPGFCI), unless otherwise
noted, are in addition to the requirements in 210.8,
which address the requirements for 150 volts or less
to ground and above 150 volts to ground.
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
Revision/New
680.10 Incorporating Heat Pumps into
Swimming Pool Circulation Equipment
Change Summary
• New subsection addressing the use of heat pumps and
associated apparatus for swimming pool installations.
Article 680 Swimming Pools, Fountains,
and Similar Installations
680.10 Electric Pool Water Heaters Incorporating
Resistive Heating Elements and Electrically Powered
Swimming Pool Heat Pumps and Chillers.
(B) Electrically Powered Swimming Pool Heat Pumps
continued on page 106