MK Products Cobra System III Gooseneck - Manual (Page 4)

equipment can fatally shock a person whose body
becomes a conductor. DO NOT STAND, SIT, LIE, LEAN
ON, OR TOUCH a wet surface when welding without
suitable protection.
To protect against shock:
Keep body and clothing dry. Never work in damp area
without adequate insulation against electrical shock.
Stay on a dry duckboard, or rubber mat when dampness
or sweat cannot be avoided. Sweat, sea water, or
moisture between body and an electrically HOT part - or
grounded metal - reduces the body surface electrical
resistance, enabling dangerous and possibly lethal
currents to flow through the body.
1. Grounding the Equipment
When installing, connect the frames of each unit such as
welding power source, control, work table, and water
circulator to the building ground. Conductors must be
adequate to carry ground currents safely. Equipment
made electrically HOT by stray currents may shock,
possibly fatally. Do NOT GROUND to electrical conduit,
or to a pipe carrying ANY gas or a flammable liquid such
as oil or fuel.
Three-phase connection. Check phase requirement of
equipment before installing. If only three-phase power is
available, connect single-phase equipment to only two
wires of the three-phase line. Do NOT connect the
equipment ground lead to the third (live) wire, or the
equipment will become electrically HOT - a dangerous
condition that can shock, possibly fatally.
Before welding, check ground for continuity. Be sure
conductors are touching bare metal of equipment frames
at connections.
If a line cord with a ground lead is provided with the
equipment for connection to a switch box, connect the
ground lead to the grounded switch box. If a three-prong
plug is added for connection to a grounded mating
receptacle, the ground lead must be connected to the
ground prong only. If the line cord comes with a three-
prong plug, connect to a grounded mating receptacle.
Never remove the ground prong from a plug, or use a
plug with a broken ground prong.
2. Connectors
Fully insulated lock-type connectors should be used to
join welding cable lengths.
3. Cables
Frequently inspect cables for wear, cracks, and damage.
IMMEDIATELY REPLACE those with excessively worn
or damaged insulation to avoid possibly lethal shock from
bared cable. Cables with damaged areas may be taped
to give resistance equivalent to original cable.
Keep cable dry, free of oil and grease, and protected from
hot metal and sparks.
4. Terminals and Other Exposed Parts
Terminals and other exposed parts of electrical units
should have insulating covers secured before operation.
5. Electrode Wire
Electrode wire becomes electrically HOT when the power
switch of gas metal-arc welding equipment is ON and
welding gun trigger is pressed. Keep hands and body
clear of wire and other HOT parts.
6. Safety Devices
Safety devices such as interlocks and circuit breakers
should not be disconnected or shunted out.
Before installation, inspection, or service of equipment,
shut OFF all power, and remove line fuses (or lock or red-tag
switches) to prevent accidental turning ON of power. Disconnect
all cables from welding power source, and
pull all 115 volts line-
cord plugs.
Do not open power circuit or change polarity while welding. If,
in an emergency, it must be disconnected, guard against
shock burns or flash from switch arcing.
Leaving equipment unattended. Always shut OFF, and
disconnect all power to equipment.
Power disconnect switch must be available near the welding
power source.
Cobra Gooseneck Owner's Manual - 8/96