Wash. Admin. Code § 296-307-48503 - Portable welding machines
(1) All
portable welding guns must have suitable counter-balanced devices for
supporting the guns, including cables, unless the design of the gun or fixture
makes counterbalancing impractical or unnecessary.
(2) All portable welding guns, transformers,
and related equipment that is suspended from overhead structures, eye beams, or
trolleys must have safety chains or cables. Safety chains or cables must be
able to support the total shock load in the event of failure of any component
of the supporting system.
(3) When
trolleys are used to support portable welding equipment, they must have
suitable forged steel clevis for the attachment of safety chains. Each clevis
must be able to support the total shock load of the suspended equipment in the
event of trolley failure.
(4) All
initiating switches, including retraction and dual schedule switches, located
on the portable welding gun must have suitable guards able to prevent
accidental initiation through contact with fixturing, operator's clothing, etc.
Initiating switch voltage must be a maximum of 24 volts.
(5) The movable holder, where it enters the
gun frame, must have enough clearance to prevent the shearing an operator's
fingers if placed on the operating movable holder.
(6) The secondary and case of all portable
welding transformers must be grounded. Secondary grounding may be by center
tapped secondary or by a center tapped grounding reactor connected across the
secondary.
Notes
97-09-013, recodified as § 296-307-48503, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040,[49.17.]050 and [49.17.]060. 96-22-048, § 296-306A-48503, filed 10/31/96, effective 12/1/96.
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