This information was found in the UL Directory and should be reviewed. I believe this applies:
EQUIPMENT GROUND-FAULT
PROTECTIVE DEVICES (FTTE)
This category covers Equipment Ground-Fault Protective Devices
(EGFPD) which operate to disconnect the electric circuit from the source
of supply when ground-fault current exceeds the ground-fault pick-up
level marked on the device.
To aid the user in making proper selection of this equipment, the EGFPDs
are marked with a ground-fault pick-up level in milliamperes and
with a voltage and current rating. The ground-fault pick-up level is limited
to the range above 6 mA to 50 mA. These devices are intended to
operate upon a condition of excessive ground-fault leakage current from
equipment, rather than minimize damage due to arcing faults in services.
EGFPDs are intended to be installed only on grounded alternating current
systems in accordance with the National Electrical Code ANSI/
NFPA-70.
EGFPDs are intended for use in applications where ground-fault protection
of equipment is required by the National Electrical Code, specifically
Sections 426-28 and 427-22, or where such protection is deemed appropriate.
A two-wire device is not suitable for use in a multiwire branch circuit as
defined in the National Electrical Code.
The devices covered by this category have not been evaluated to provide
electric shock protection for personnel and they are not intended to be
used in place of a ground-fault circuit interrupter (GFCI) where a GFCI is
required by the National Electrical Code. See Ground-Fault Circuit Interrupters
(KCXS) for further information.
The devices covered by this category are not intended to be used in electrical
service entrance equipment where ground-fault sensing and relaying
equipment, required by Section 230-95 of the National Electrical Code, is
used. See Ground-Fault Sensing and Relaying Equipment (KDAX) for further
information.
The basic standard used to investigate products in this category is UL
1053, ‘‘Ground-Fault Sensing and Relaying Equipment.’’ Some requirements
are also derived from UL 943, ‘‘Ground-Fault Circuit-Interrupters.’’
The Listing Mark of Underwriters Laboratories Inc. on the product is the
only method provided by UL to identify products manufactured under its
Listing and Follow-Up Service. The Listing Mark for these products
includes the UL symbol (as illustrated in the Introduction of this Directory)
together with the word ‘‘LISTED,’’ a control number, and the product
name ‘‘Equipment Ground-Fault Protective Device’’ or ‘‘EGFPD.’’
