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Transformer-Type Arc-Welding Machines
| Published by | Publication Date | Number of Pages |
| UL | 04/24/2009 | 58 |
UL 551 – Transformer-Type Arc-Welding Machines
Please note:All interim revisions for this edition available at time of your purchase will be included.
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.
1.2 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.
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