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ULS - UL 551

Standard for Transformer-Type Arc-Welding Machines

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Organization: ULS
Publication Date: 24 April 2009
Status: active
scope:

ul-551.8

Transformer-Type Arc-Welding Machines

UL 551

1 Scope

1.1 These requirements cover limited duty welding and cutting power sources, wire feeders, torches, and electrode holders that are intended for use by a layperson in a nonindustrial setting in accordance with the National Electrical Code, NFPA 70. Products covered by these requirements include only those welding products rated 600 volts or less, and are commonly known as hobby welders.


1.1 revised effective July 15, 2009

1.2 These requirements do not cover motor-generator sets or rectifier- or resistance-type welding machines. These requirements do not cover industrial or professional use welders.


1.2 revised effective July 15, 2009

Document History

January 8, 2018
Standard for Transformer-Type Arc-Welding Machines
Transformer-Type Arc-Welding Machines UL 551 1 Scope 1.1 These requirements cover limited duty welding and cutting power sources, wire feeders, torches, and electrode holders that are intended for...
January 3, 2018
Standard for Transformer-Type Arc-Welding Machines
Transformer-Type Arc-Welding Machines UL 551 1 Scope 1.1 These requirements cover limited duty welding and cutting power sources, wire feeders, torches, and electrode holders that are intended for...
November 19, 2013
Standard for Transformer-Type Arc-Welding Machines
Transformer-Type Arc-Welding Machines UL 551 1 Scope 1.1 These requirements cover limited duty welding and cutting power sources, wire feeders, torches, and electrode holders that are intended for...
October 29, 2013
Standard for Transformer-Type Arc-Welding Machines
Transformer-Type Arc-Welding Machines UL 551 1 Scope 1.1 These requirements cover limited duty welding and cutting power sources, wire feeders, torches, and electrode holders that are intended for...
June 23, 2011
Standard for Transformer-Type Arc-Welding Machines
Transformer-Type Arc-Welding Machines UL 551 1 Scope 1.1 These requirements cover limited duty welding and cutting power sources, wire feeders, torches, and electrode holders that are intended for...
December 31, 2009
Standard for Transformer-Type Arc-Welding Machines
Transformer-Type Arc-Welding Machines UL 551 1 Scope 1.1 These requirements cover limited duty welding and cutting power sources, wire feeders, torches, and electrode holders that are intended for...
July 15, 2009
Standard for Transformer-Type Arc-Welding Machines
Transformer-Type Arc-Welding Machines UL 551 1 Scope 1.1 These requirements cover limited duty welding and cutting power sources, wire feeders, torches, and electrode holders that are intended for...
UL 551
April 24, 2009
Standard for Transformer-Type Arc-Welding Machines
Transformer-Type Arc-Welding Machines UL 551 1 Scope 1.1 These requirements cover limited duty welding and cutting power sources, wire feeders, torches, and electrode holders that are intended for...

References

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