Lincoln Electric IM774 manual Safety

ii			SAFETY				ii
		ELECTRIC SHOCK can				ARC RAYS can burn.
		kill.				plates to protect your eyes from sparks and
						4.a. Use a shield with the proper filter and cover
		3.a. The electrode and work (or ground) circuits				the rays of the arc when welding or observing
			are electrically “hot” when the welder is on.
						open arc welding. Headshield and filter lens
			Do not touch these “hot” parts with your bare
						should conform to ANSI Z87. I standards.
			skin or wet clothing. Wear dry, hole-free
		gloves to insulate hands.		4.b. Use suitable clothing made from durable flame-resistant
3.b. Insulate yourself from work and ground using dry insulation.						material to protect your skin and that of your helpers from
						the arc rays.
	Make certain the insulation is large enough to cover your full
	area of physical contact with work and ground.			4.c. Protect other nearby personnel with suitable, non-flammable
	In addition to the normal safety precautions, if welding					screening and/or warn them not to watch the arc nor expose
						themselves to the arc rays or to hot spatter or metal.
	must be performed under electrically hazardous
						FUMES AND GASES
	scaffolds; when in cramped positions such as sitting,
	conditions (in damp locations or while wearing wet
	clothing; on metal structures such as floors, gratings or					can be dangerous.
	kneeling or lying, if there is a high risk of unavoidable or
	accidental contact with the workpiece or ground) use					5.a. Welding may produce fumes and gases
	the following equipment:					hazardous to health. Avoid breathing these
	• Semiautomatic DC Constant Voltage (Wire) Welder.					fumes and gases. When welding, keep
	• DC Manual (Stick) Welder.					your head out of the fume. Use enough
	• AC Welder with Reduced Voltage Control.					ventilation and/or exhaust at the arc to keep
3.c. In semiautomatic or automatic wire welding, the electrode,					fumes and gases away from the breathing zone.		When
					welding with electrodes which require special
	electrode reel, welding head, nozzle or semiautomatic				ventilation such as stainless or hard facing (see
	welding gun are also electrically “hot”.				instructions on container or MSDS) or on lead or
3.d. Always be sure the work cable makes a good electrical					cadmium plated steel and other metals or coatings
					which produce highly toxic fumes, keep exposure as
	connection with the metal being welded. The connection				low as possible and below Threshold Limit Values (TLV)
	should be as close as possible to the area being welded.				using local exhaust or mechanical ventilation. In
3.e. Ground the work or metal to be welded to a good electrical					confined spaces or in some circumstances, outdoors, a
					respirator may be required. Additional precautions are
	(earth) ground.				also required when welding on galvanized steel.
3.f.	Maintain the electrode holder, work clamp, welding cable and			5. b. The operation of welding fume control equipment is affected
	welding machine in good, safe operating condition. Replace					by various factors including proper use and positioning of
	damaged insulation.					the equipment, maintenance of the equipment and the spe-
						cific welding procedure and application involved. Worker
3.g. Never dip the electrode in water for cooling.						exposure level should be checked upon installation and
						periodically thereafter to be certain it is within applicable
3.h. Never simultaneously touch electrically “hot” parts of						OSHA PEL and ACGIH TLV limits.
	electrode holders connected to two welders because voltage			5.c. Do not weld in locations near chlorinated hydrocarbon vapors
	between the two can be the total of the open circuit voltage
	of both welders.					coming from degreasing, cleaning or spraying operations.
						The heat and rays of the arc can react with solvent vapors to
3.i. When working above floor level, use a safety belt to protect						form phosgene, a highly toxic gas, and other irritating prod-
	yourself from a fall should you get a shock.					ucts.
3.j.	Also see Items 6.c. and 8.			5.d. Shielding gases used for arc welding can displace air and
					cause injury or death. Always use enough ventilation,
					especially in confined areas, to insure breathing air is safe.
				5.e. Read and understand the manufacturerʼs instructions for this
						equipment and the consumables to be used, including the
						material safety data sheet (MSDS) and follow your
						employerʼs safety practices. MSDS forms are available from
						your welding distributor or from the manufacturer.
				5.f. Also see item 1.b.
				AUG 06

CobraMAX™ Owner's Manual - Page ii