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Select one: Across-the-line contactors, motor rated (NLDX) Across-the-line contactors, non-motor rated (NRNT) Across-the-line contactors, pilot duty (coil) rated (NKCR) Autotransformer starters (NLDX) Auxiliary contacts (NKCR) Brakes, electro-mechanical (NMTR) Clutches (NMTR) Combination motor controllers (NKJH) Definite purpose motor controllers (NLDX) Definite purpose motor starters (NLDX) Draw-out vacuum contactors-1500 V or less (NLDX) Drives (NMMS) Drum switches (NLRV) Dynamic brakes (NMMS) Enclosures (CYIV, EOFI, BGUZ) Float switches (NKPZ) Foot switches, motor rated (NLRV) Foot switches, non-motor rated (NRNT) Foot switches, pilot duty (coil) rated (NKCR) Key-operated switches (NKCR) Lamp dimmers, theater (NMTR) Light towers (NKCR) Limit switches (NKCR) Line reactors (NMTR) Line rheostats (NMTR) Machine (CAM) operated switches (NKCR) Machine (CAM) operated switches, manual (NLRV) Magnetic motor controllers (NLDX) Manual motor controllers (NLRV) Manual motor starters (NLRV) Mercury tube switches, motor rated (NLDX) Mercury tube switches, non-motor rated (NRNT) Motor-starting autotransformers (NMTR) Motor-starting resistors (NMTR) Motor-starting rheostats (NMTR) Overload relays, mechanical or electronic (NKCR) Panels, industrial control (NITW) Pendant stations (NKCR) Phase monitors (NKCR) Pilot lights (NKCR) Plug-in relays, magnetic (NLDX) Plug-in relays, manual (NRNT) Plug-in relays, pilot duty (coil) rated (NKCR) Power supplies (NMTR) Pressure switches (NKPZ) Programmable controllers (NRAQ) Proximity switches (NRKH) Pushbuttons (NKCR) Pushbutton stations (NKCR) Reduced voltage solid state motor controllers (soft starters) (NMFT) Reduced voltage starters (NLDX) Relays, magnetic (NLDX) Relays, manual (NRNT) Relays, pilot duty (coil) rated (NKCR) Relays, solid state motor rated (NMFT) Relays, solid state non-motor rated (NRNT) Relays, solid state pilot duty (coil) rated (NKCR) Reversing contactors (NLDX) Reversing starters (NLDX) Servo Drives (NMMS) Soft starters (NMFT) Solid state contactors, motor rated (NMFT) Solid state relays, motor rated (NMFT) Solid state relays, non-motor rated (NRNT) Solid state relays, pilot duty (coil) rated (NKCR) Solid state time-delay relays (NMFT) Stepper motor drives (NMMS) Time-delay relays, magnetic (NLDX) Time-delay relays, manual (NRNT) Time-delay relays, pilot duty (coil) rated (NKCR) Vacuum contactors, over 1500 V (NJHU) Vacuum contactors, under 1500 V (NLDX) Vacuum-operated switches (NKPZ) Wye-delta starters (NLDX)

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:

• Boxes-Junction and Pull (BGUZ)
• Cabinets and Cutout Boxes-Sheet metal (CYIV)

The scope of UL 508A covers the following category (also see Industrial Control Panels below):

• Industrial Control Panel enclosures (NITW)

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)

High Voltage Industrial Control Equipment

The scope of UL 347 covers the following categories:

• Motor Controllers-Over 1500 Volts (NJHU)
• Motor Controller Accessories-Over 1500 V (NJIJ)

Power Conversion Equipment

The scope of UL 508C covers the following category:

• Power Conversion Equipment (NMMS)

International standards- IEC publications

The requirements of IEC 529 are used to evaluate products covered in the following category:

• Degrees of Protection by Enclosures Evaluated in accordance with IEC publications (EOFI)

The requirements of IEC 60947-5-1 are used to evaluate products covered in the following category:

• Industrial Control Equipment, Auxiliary Devices classified in accordance with IEC Publications (NVZG)

The requirements of IEC 60204-1 are used to evaluate products covered in the following categories:

• Industrial Control Equipment, Industrial Control Panels classified in accordance with IEC Publications (NVZS)
• Industrial Control Equipment, Programmable Controllers classified in accordance with IEC Publications (NWCS)

The requirements of IEC 60146-1, -2 and -3 are used to evaluate products covered in the following category:

• Industrial Control Equipment, Power Conversion Equipment classified in accordance with IEC Publications (NWAR)

The requirements of IEC 60947-5-2 are used to evaluate products covered in the following category:

• Industrial Control Equipment, Proximity Switches classified in accordance with IEC Publications (NWEU)

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