Westweld NB-350MK, Manual Instruction

Page: 5 / 30

1 Safety
C a u t i o n s
Arc and arc rays may harm health.
Arc welding can be hazardous. All performing welding workers ought to have health qualification that provided by authority
organization. Protect yourself and others from possible serious injury or death. Keep children away. Pacemaker wearers should
consult with their doctor before operating. Be sure that all installation, operation, maintenance and repair procedures are
performed only by qualified individuals.
1
Electric shock can kill : The electrode and work (or ground) circuits are electrically “hot” when the welder is
on. Do not touch these “hot” parts with your bare skin or wet clothing, Wear dry, hole-free gloves to insulate
hands. Users need to follow the below items to avoid electric shocks:

Insulate yourself from work and ground using dry insulation. Make certain the insulation is large enough to cover your full
area of physical contact with work and ground. Otherwise, use automatic or semiautomatic welding machines, DC welding
machines as possible as you can.

In semiautomatic or automatic wire welding, the electrode, electrode reel, welding head, nozzle or semiautomatic welding
gun are also electrically “hot”.

Always be sure the work cable makes a good electrical connection with the metal being welded. The connection should be as
close as possible to the area being welded.

Ground the work or metal to be welded to a good electrical (earth) ground.

Maintain the electrode holder, work clamp, welding cable and welding machine in good, safe operating condition. Replace
damaged insulation.

Never dip the electrode in water for cooling.

Never simultaneously touch electrically “hot”parts of electrode holders connected to two welders, because voltage between
the two can be the total of the open circuit voltage of both welders.

When working above floor level, please do wear safety belt to avoid falling or losing balance on electric shock.
2
Arc rays can burn : Use a shield with the proper filter and cover plates to protect your eyes from sparks and
the rays of the arc when welding or observing open arc welding. Head shield and filter lens should conform to
nation standards.

Use suitable clothing made from durable flame-resistant material to protect your skin and that of your helpers from the arc
rays.

Protect other nearby personnel with suitable, non-flammable screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.