UL and international standards for industrial control equipment
Because many categories fall within the scope of industrial control equipment, there are several standards used to evaluate industrial products.
Below is an index of basic standards and the products covered by each standard. The four-letter code, shown in parentheses following each category title, is the product category guide designation.
For information on ordering the UL Standards for industrial control equipment, consult the UL StandardsNet.
UL Standards
Electrical enclosures
The scope of UL 50 covers the following categories:
The scope of UL 508A covers the following category (also see industrial control panels below):
Industrial control panels (assemblies of industrial control devices and other devices associated with the control of motor-operated and related industrial equipment.)
The scope of UL 508A covers the following categories:
- Industrial Control Panels (NITW)
- Flame Control Panels
- Power Press Control Panel enclosures
- Industrial Control Panel Enclosures
Industrial control equipment
The scope of UL 508 covers the following categories:
- Auxiliary Devices (NKCR)*
- Combination Motor Controllers (NKJH)*
- Float and Pressure-Operated Switches (NKPZ)
- Magnetic Motor Controllers (NLDX)*
- Manual Motor Controllers (NLRV)*
- Motor Controllers-Miscellaneous (NMFT)
- Miscellaneous Apparatus (NMTR)
- Switches-Industrial Control (NRNT)*
- Programmable Controllers (NRAQ)#
- Proximity Switches (NRKH)@
* Also covered under the scope of UL 60947-4-1A, Low-Voltage Switchgear and Controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters.
# Also covered under the scope of UL Standard for Safety for Programmable Controllers - Part 2: Equipment Requirements and Tests, UL 61131-2.
@ Also covered under the scope of UL Standard for Safety for Low-Voltage Switchgear and Controlgear - Part 5-2: Control circuit devices and switching elements - Proximity switches, UL 60947-5-2.
High voltage industrial control equipment
The scope of UL 347 covers the following categories:
Power conversion equipment
The scope of UL 508C covers the following category:
International standards -- IEC publications
The requirements of IEC 60529-1 are used to evaluate products covered in the following category:
The requirements of IEC 60947-5-1 are used to evaluate products covered in the following category:
The requirements of IEC 60204-1 are used to evaluate products covered in the following category:
The requirements of IEC 60146-1, -2 and -3 are used to evaluate products covered in the following category:
The requirements of IEC 60947-5-2 are used to evaluate products covered in the following category:
