Wash. Admin. Code § 296-24-69005 - Portable welding machines
(1)
Counter-balance. 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)Safety
chains. All portable welding guns, transformers and related equipment
that is suspended from overhead structures, eye beams, trolleys, etc., must be
equipped with safety chains or cables. Safety chains or cables must be capable
of supporting the total shock load in the event of failure of any component of
the supporting system.
(3)
Clevis. When trolleys are used to support portable welding
equipment, they must be equipped with suitable forged steel clevis for the
attachment of safety chains. Each clevis must be capable of supporting the
total shock load of the suspended equipment in the event of trolley
failure.
(4)
Switch
guards. All initiating switches, including retraction and dual schedule
switches, located on the portable welding gun must be equipped with suitable
guards capable of preventing accidental initiation through contact with
fixturing, operator's clothing, etc. Initiating switch voltage must not exceed
24 volts.
(5)Moving
holder. The movable holder, where it enters the gun frame, must have
sufficient clearance to prevent the shearing of fingers carelessly placed on
the operating movable holder.
(6)Grounding. 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
Order 73-5, § 296-24-69005, filed 5/9/73 and Order 73-4, § 296-24-69005, filed 5/7/73.
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