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PDFWAC 296-307-49001

What environmental conditions must be taken into account when selecting arc welding equipment?

Note:
You may ensure that your equipment is designed for safety by choosing equipment that complies with the Requirements for Electric Arc-Welding Apparatus, NEMA EW-1-1962, National Electrical Manufacturers Association or the Safety Standard for Transformer-Type Arc-Welding Machines, ANSI C33.2-1956, Underwriters' Laboratories.
(1) Standard machines for arc welding service must be designed and constructed to carry their rated load with rated temperature rises where the temperature of the cooling air is a maximum of 40°C (104°F) and where the altitude is a maximum of 3,300 feet, and must be suitable for operation in atmospheres containing gases, dust, and light rays produced by the welding arc.
(2) When exposed to the following or other conditions, machines must be designed to safely meet the requirements of the service.
• Unusually corrosive fumes;
• Steam or excessive humidity;
• Excessive oil vapor;
• Flammable gases;
• Abnormal vibration or shock;
• Excessive dust;
• Weather;
• Unusual seacoast or shipboard conditions.
[WSR 97-09-013, recodified as § 296-307-49001, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. WSR 96-22-048, § 296-306A-49001, filed 10/31/96, effective 12/1/96.]
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