September 2009
For regulatory authorities in the electrical inspection community.
UL Certified High Voltage
Equipment for Use in
Electrical Systems
Q: Does UL certify equipment for use in
electrical systems rated over 600 V?
A: Yes. UL has certification programs (Listing
and Classification) for many types of electrical
equipment for use in systems rated for high
voltage applications, including:
• Wire connectors
• Overcurrent protective devices
• Switchgear
• Transformers
• Surge protective devices
• Busways
• Wiring methods
• Control equipment
The National Electrical Code (NEC) contains
numerous requirements that are applicable
to high voltage systems and equipment rated
over 600 V, such as Article 100 Part II and
®
Article 110 Parts III & IV. In addition to the
numerous sections of the NEC that refer
to installations of equipment rated over 600 V,
Article 490 is specifically dedicated to
Equipment Over 600 Volts Nominal. For the
Canadian Electrical Code ® (CEC), high voltage
is defined to be any voltage exceeding 750 V.
The UL White Book should be consulted for
valuable information regarding installation of
equipment intended for high voltage applications. In the 2009 UL White Book, you will
find a comprehensive list of equipment and
devices rated over 600 V on page 31. For your
convenience, see the table on the following
page for a list of UL product categories for
equipment rated over 600 V.
For more information about UL’s requirements
for evaluating high voltage equipment, please
contact Paul Barnhart at +1.919.549.1446 or
Paul.D.Barnhart@us.ul.com.
(continued on page 2)
Medium Voltage Transformer, Cable
and Terminations
UL
Electrical Connections
a supplement of The Code Authority®
September 2009
UL certified equipment for use in electrical systems (continued from page 1)
Equipment and Devices Rated Over 600 V
Product Category Description
UL Category Code
2009 UL White Book Page
Fuses, Over 600 Volts
JEEG
189
Circuit Breakers and Metal-clad Switchgear Over 600 Volts
DLAH
98
Circuit Breakers, Medium Voltage, Classified for Use in Specified Equipment
DLBC
99
Circuit Breaker Switchgear, Metal Enclosed, Over 600 Volts
DLBK
99
Switchgear, Gas Insulated Type, Over 600 Volts
WVEK
392
Switches, Load Interrupter and Isolating, Over 600 Volts
WIQG
384
Switchgear, Metal Enclosed, Over 600 Volts
WVGN
392
Switchgear, Pad Mounted, Over 600 Volts
WVHN
Online Directory
Transfer Switches
WPTZ
387
Automatic Transfer Switches Over 600 Volts
WPYC
389
Overcurrent Protection and Switchgear
Power Distribution Equipment and Devices
Grounding Equipment, Neutral Grounding Devices, Over 600 Volts
KDZC
196
Surge Arresters 1000 Volts and Higher
VZQK
371
Transformers, Distribution, Dry Type, Over 600 Volts
XPFS
411
Transformers, Distribution, Liquid-filled Type, Over 600 Volts
XPLH
411
Unit Substations Over 600 Volts
YEFV
420
Busways, Metal Enclosed, Over 600 Volts
CVZW
86
Crane Equipment, Over 600 Volts
ELRK
Online Directory
Wiring Methods and Devices
Metal-clad Cable
PJAZ
263
Metal-clad Cable Connectors, Type MC
PJOX
264
Cable for Use in Hazardous Locations
PJPP
265
Metal-clad Cable Classified in Accordance with UL 1569, with Metric Conductor Sizes
PJPJ
264
Medium-voltage Power Cable
PITY
262
Medium-voltage Cable Classified in Accordance with UL 1072, with Metric Conductor Sizes
PIVW
263
Power and Control Tray Cable
QPOR
303
Power and Control Tray Cable Connectors
QPOZ
304
Wire Connectors and Soldering Lugs
ZMVV
434
Thermoset-insulated Wire
ZKST
430
Motor Controllers
NJOT
230
Motor Controllers Over 1500 Volts
NJHU
229
Motor Controller Accessories Over 1500 Volts
NJIJ
230
Motor Controllers Over 1500 Volts for Use in Hazardous Locations
NRAA
239
Power Conversion Equipment, Medium Voltage
NJIC
230
Pump Controllers, Fire, Over 600 Volts
QZGR
317
Control Equipment
Published by the
Regulatory Services Department
of Underwriters Laboratories Inc.
© 2009. All rights reserved.
Managing Editor: Jeffrey A. Fecteau
+1.651.408.8562
Jeffrey.Fecteau@us.ul.com
www.ul.com/tcaec