Lincoln Electric SVM162-B Turn the input power OFF at, Disconnect switch or fuse box, Ment

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A-5	INSTALLATION			A-5
are free of cuts and cracks that allow high frequen-		INPUT and GROUNDING CONNECTIONS
3. Be sure the torch and work cable rubber coverings				WARNING
such as Lincoln Stable-Arc R	better resist high fre-
cy leakage. Cables with high natural rubber content,
quency leakage than neoprene and other synthetic
				ELECTRIC SHOCK can kill.
rubber insulated cables.
4. Keep the torch in good repair and all connections				* Turn the input power OFF at the
tight to reduce high frequency leakage.				disconnect switch or fuse box
5. The work terminal must be connected to a ground*				before working on this equip-
within ten feet of the welder, using one of the follow-				ment.
ing methods.		___________________________________________
* A metal underground water pipe in direct contact		Be sure the voltage, phase, and frequency of the
		input power is as specified on the rating plate, located
with the earth for ten feet or more.		on the rear of the machine.
* A 3/4” (19mm) galvanized pipe or a 5/8” (16mm)		Fuse the input circuit with the recommended super
solid galvanized iron, steel or copper rod driven at		lag fuses or delay type1 circuit breakers. Choose an
least eight feet into the ground.		input and grounding wire size according to local or
The ground should be securely made and the ground-		national codes or use Section A-2. Using fuses or cir-
ing cable should be as short as possible using cable of		cuit breakers smaller than recommended may result
the same size as the work cable, or larger. Grounding		in “nuisance” tripping from welder inrush currents
to the building frame electrical conduit or a long pipe		even if not welding at high currents.
system can result in re-radiation, effectively making		Unbalanced AC TIG welding draws higher input cur-
these members radiating antennas. (This is not recom-		rents than those for Stick, DC TIG, or Balanced AC
mended.)		TIG welding. The welder is designed for these higher
6. Keep all access panels and covers securely in		input currents. However, where unbalanced AC TIG
		welding above 185 amps is planned, the higher input
place.		currents require larger input wire sizes and fuses per
7. All electrical conductors within 50 feet (15.2m) of the		Section A-2:
welder should be enclosed in grounded rigid metal-		Remove the reconnect panel cover located near the
lic conduit or equivalent shielding. Flexible helically-		back of the left case side to reveal the reconnected
wrapped metallic conduit is generally not suitable.		panel. Welder supply line entry provision is in the
8. When the welder is enclosed in a metal building,		case rear panel. Entry is through a 1.75 inch (44mm)
several earth driven electrical grounds (as in 5		diameter hole in the case back. Appropriate supply
above) around the periphery of the building are rec-		line strain relief clamp is provided by installer. (See
ommended.		Figure A.1)
Failure to observe these recommended installation		All connections should be made in accordance
procedures can cause radio or TV interference prob-				FIGURE A.1
lems and result in unsatisfactory welding performance
resulting from lost high frequency power.
			CONNECT INPUT
			POWER LEADS
			CONNECT INPUT	CONNECT INPUT
			GROUND LEAD	VOLTAGE LEVEL

with all local codes and national electrical codes. Installation by a qualified electrician is recom- mended.

PRECISION TIG 275