Lincoln Electric 400 (AU) manual Electrical Connections

A-6 INSTALLATION A-6

ELECTRICAL CONNECTIONS

MACHINE GROUNDING

Because this portable engine driven welder creates its own power, it is not necessary to connect its frame to an earth ground, unless the machine is connected to premises wiring (home, shop, etc.)

To prevent dangerous electric shock, other equipment to which this engine driven welder supplies power must:

WELDING OUTPUT CABLES

With the engine off connect the electrode and work cables to the output studs. The welding process dic- tates the polarity of the electrode cable. These con- nections should be checked periodically and tightened with a 3/4" (19mm) wrench.

Table A.1 lists recommended cable sizes and lengths for rated current and duty cycle. Length refers to the distance from the welder to the work and back to the welder. Cable diameters are increased for long cable lengths to reduce voltage drops.

WARNING

TABLE A.1

• Be grounded to the frame of the welder using a
grounded type plug or be double insulated.			TOTAL COMBINED LENGTH OF
• Do not ground the machine to a pipe that carries			ELECTRODE AND WORK CABLES
explosive or combustible material.
				Cable Size for
------------------------------------------------------------------------			Cable Length
				400 Amps
When this welder is mounted on a truck or trailer, its				60% Duty Cycle
frame must be electrically bonded to the metal frame		0-100 Ft. (0-30 meters)		2 / 0 AWG
of the vehicle. Use a #8 or larger copper wire connect-				2 / 0 AWG
ed between the machine grounding stud and the		100-150 Ft. (30-46 meters)
frame of the vehicle. When this engine driven welder		150-200 Ft. (46-61 meters)		3 / 0 AWG
is connected to premises wiring such as that in a
home or shop, its frame must be connected to the
system earth ground. See further connection instruc-
tions in the section entitled "Standby Power	CABLE INSTALLATION
Connections" as well as the article on grounding in the
latest National Electrical Code and the local code.	Install the welding cables to your VANTAGE® 400
	(AU) as follows.
In general, if the machine is to be grounded, it should	1. The engine must be OFF to install welding cables.
be connected with a #8 or larger copper wire to a solid
earth ground such as a metal water pipe going into	2. Remove the flanged nuts from the output terminals.
the ground for at least ten feet and having no insulat-
ed joints, or to the metal framework of a building	3. Connect the electrode holder and work cables to
which has been effectively grounded.
		the weld output terminals. The terminals are identi-
The National Electrical Code lists a number of alter-		fied on the case front.
nate means of grounding electrical equipment. A	4. Tighten the flanged nuts securely.
machine grounding stud marked with the symbol
is provided on the front of the welder.	5. Be certain that the metal piece you are welding (the
WELDING TERMINALS		“work”) is properly connected to the work clamp and
The VANTAGE® 400 (AU) is equipped with a toggle		cable.
switch for selecting "hot" welding terminal when in the	6. Check and tighten the connections periodically.
"WELD TERMINALS ON" position or "cold" welding
terminal when in the "REMOTELY CONTROLLED"
			CAUTION
position.

• Loose connections will cause the output termi- nals to overheat. The terminals may eventually melt.

• Do not cross the welding cables at the output ter- minal connection. Keep the cables isolated and separate from one another.

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VANTAGE® 400 (AU)