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Standard 551, Edition 8

Transformer-Type Arc-Welding Machines

UL Standard
Standard 551, Edition 8 Edition Date: April 24, 2009 ANSI Approved: May 24, 2022 $505.00-$1,258.00

Revisions and Related Documents

Revisions
Red Line Std. (9)

Date      
June 02, 2022 Redline Revision
January 08, 2018 Revision
January 03, 2018 Revision
November 19, 2013 Revision
October 29, 2013 Revision
June 23, 2011 Revision
December 31, 2009 Revision
July 15, 2009 Revision
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CSDS
Proposals (3)

CSDS Proposal   

CSDS Proposals

An electronic document associated with a UL Standard for Safety or Outline of Investigation, and issued by UL to propose:

  • A revision of a single or multiple requirement(s).
  • A complete new edition of an existing Standard or Outline.
  • A new Standard or Outline that has not previously been published.

CSDS Proposals provide access to view the proposal and submit comments within UL's Collaborative Standards Development System (CSDS) appropriately.

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March 25, 2022
November 10, 2017
September 06, 2013
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UL LLC CRD (0)

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Other Updates (0)

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Referenced Standards (42)

Below is a list of UL Standards referenced in UL 551

StandardEditionTitle
20 14 General-Use Snap Switches
44 19 Thermoset-Insulated Wires and Cables
62 20 Flexible Cords and Cables
83 16 Standard for Thermoplastic-Insulated Wires and Cables
224 7 Extruded Insulating Tubing
310 9 Standard for Electrical Quick-Connect Terminals
429 7 Electrically Operated Valves
489 13 Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures
498 16 Attachment Plugs and Receptacles
510 10 Polyvinyl Chloride, Polyethylene, and Rubber Insulating Tape
746A 6 Polymeric Materials - Short Term Property Evaluations
746B 5 Polymeric Materials - Long Term Property Evaluations
746C 7 Polymeric Materials - Use in Electrical Equipment Evaluations
746D 8 Polymeric Materials - Fabricated Parts
796 12 Printed Wiring Boards
810 6 Capacitors
817 12 Cord Sets and Power-Supply Cords
1059 5 Terminal Blocks
1063 9 Machine-Tool Wires and Cables
2111 1 Standard for Overheating Protection for Motors
248-1 4 Low-Voltage Fuses - Part 1: General Requirements
248-6 2 Standard for Low-Voltage Fuses - Part 6: Class H Non-Renewable Fuses
248-7 2 Standard for Low-Voltage Fuses - Part 7: Class H Renewable Fuses
248-9 2 Standard for Low-Voltage Fuses - Part 9: Class K Fuses
1004-1 2 Rotating Electrical Machines - General Requirements
1004-2 2 Standard for Impedance Protected Motors
1004-3 2 Thermally Protected Motors
248-11 3 Low-Voltage Fuses - Part 11: Plug Fuses
248-12 3 Low-Voltage Fuses - Part 12: Class R Fuses
248-15 3 Low-Voltage Fuses - Part 15: Class T Fuses
4248-1 3 Fuseholders - Part 1: General Requirements
4248-6 2 Fuseholders - Part 6: Class H
4248-9 1 Fuseholders - Part 9: Class K
5085-1 1 Low Voltage Transformers - Part 1: General Requirements
5085-2 2 Low Voltage Transformers - Part 2: General Purpose Transformers
60691 4 Standard for Thermal-Links - Requirements and Application Guide
4248-11 1 Fuseholders - Part 11: Type C (Edison Base) and Type S Plug Fuse
4248-12 2 Fuseholders - Part 12: Class R
4248-15 1 Fuseholders - Part 15: Class T
486A-486B 3 Wire Connectors
60730-1 5 Automatic Electrical Controls - Part 1: General Requirements
61058-1 5 Switches for Appliances - Part 1: General Requirements
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Reverse Referenced Standards (1)

UL 551 is referenced in the following list of UL Standards

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