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UL
UL 508:18ED 2018-03

UL 508:18ED 2018-03

Current

Current

The latest, up-to-date edition.

Industrial Control Equipment

Available format(s)

Hardcopy

Language(s)

English

Published date

30-03-2018

Publisher

Underwriters Laboratories

INTRODUCTION
PART I - ALL EQUIPMENT
ENCLOSURE CONSTRUCTION
ENCLOSURE PERFORMANCE
INSTRUCTIONS AND MARKINGS PERTAINING TO ENCLOSURES
DEVICE CONSTRUCTION
DEVICE PERFORMANCE
DEVICE RATING
MARKING
INSTRUCTIONS AND MARKINGS PERTAINING TO ACCESSORIES
MANUFACTURING AND PRODUCTION TESTS
PART II - MAGNETIC MOTOR CONTROLLERS
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART III - MANUAL MOTOR CONTROLLERS
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART IV - COMBINATION MOTOR CONTROLLERS
CONSTRUCTION
PERFORMANCE
RATINGS
MARKING
PART V - REDUCED-VOLTAGE STARTERS
CONSTRUCTION
PERFORMANCE
RATINGS
MARKING
PART VI - SOLID-STATE AC MOTOR CONTROLLERS
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART VII - FLOAT- AND PRESSURE-OPERATED SWITCHES
GENERAL
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART VIII - SEMICONDUCTOR RELAYS AND SWITCHES
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART IX - MERCURY TUBE SWITCHES
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART X - AUXILIARY DEVICES
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART XI - MECHANICAL OVERLOAD RELAYS
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART XII - ELECTRONIC OVERLOAD RELAYS
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART XIII - DEFINITE PURPOSE CONTROLLERS
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART XIV - SERVICE EQUIPMENT
PART XV - LAMP DIMMERS
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART XVI - MISCELLANEOUS DEVICES
Construction
PERFORMANCE
RATING
MARKING
PART XVII - PROGRAMMABLE CONTROLLERS
GENERAL
CONSTRUCTION
PERFORMANCE
RATING
MARKING
PART XVIII - EQUIPMENT RATED 601- 1500 VOLTS
GENERAL
CONSTRUCTION
PERFORMANCE
PART XIX - PROXIMITY SWITCHES
GENERAL
CONSTRUCTION
PERFORMANCE
RATING
MARKING
SUPPLEMENT SA - INDUSTRIAL CONTROL EQUIPMENT FOR MARINE USE
APPENDIX A - Standards for Components
INDEX

This revision of ANSI/UL 508 dated July 8, 2021 includes the following changes in requirements: – Correction of Fahrenheit temperature values in Table 45.2 – Update to lithium battery requirements; Section 31 and 72.14 – Clarification of the use of Table 45.2 (Maximum enclosure surface temperature rises); 45.2, 45.3 and 45.4 – Correction to DC Offset Test for dimmers; Table 189.1 and 193.2 – Addition of LED driver rating; Table 48.1, 68.1, Table 69.4 and 70.11 – Revision of scope to reflect effective UL 60947 standards; 1.3, 1.11, 19.2.6, Table 56.1, Table 74.1, Sections 78 – 109, 163 – 186, – Ground current requirement for flush-device box switches controlling lighting loads; Sections 42.4, 66A, 68A, 70.40 – Withdrawal of UL 508C reference in UL 508, replacing UL 508C with UL 61800-5-1; 1.6

1.1 These requirements cover industrial control devices, and devices accessory thereto, for starting, stopping, regulating, controlling, or protecting electric motors.

DocumentType
Standard
Pages
0
PublisherName
Underwriters Laboratories
Status
Current

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