Lincoln Electric TIG 375 manual Output CABLES, Connections and Limitations, Work Cable Connection

A-5 INSTALLATION A-5

Welders are shipped connected for the highest input voltage as listed on the rating plate. To change this connection, designations on the reconnect panel LOW, MID, and HIGH correspond to the name plated input voltages of a triple voltage welder. Dual voltage welders use only LOW and HIGH.

EXAMPLE: On a 208/230/460 volt welder, LOW is 208V, MID is 230V, and HIGH is 460V.

Note: Export model has a voltage range for LOW and MID connections: LOW is 220-230V, MID is 380-400V and High is 415V.

Reconnect the jumper strap to the terminal stud corre- sponding to the input voltage level used. Make sure all connections are tight.

Fuse the input circuit with the recommended super lag fuses or delay type1 circuit breakers. Choose an input and grounding wire size according to local or national codes or use Section A-2. Using fuses or circuit break- ers smaller than recommended may result in "nui- sance" tripping from welder inrush currents even if not welding at high currents.

Unbalanced AC TIG welding draws higher input cur- rents than those for Stick, DC TIG, or Balanced AC TIG welding. The welder is designed for these higher input currents. However, where unbalanced AC TIG welding above 275 amps is planned, the higher input currents require larger input wire sizes and fuses per Section A- 2.

OUTPUT CABLES, CONNECTIONS AND LIMITATIONS

WARNING

•To avoid being startled by a high frequency shock, keep the TIG torch and cables in good condition

•Turn the power switch of the power source OFF before installing adapters on cable or when con- necting or disconnecting adapter plugs to power source.

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Refer to Figure A.2 for the location of the WORK and STICK terminals, as well as the TIG Torch connection panel.

Recommended Cable Sizes for Combined Lengths of Copper Work and Electrode Cables using 75o C Wire:

Machine Rating	0 to 100 Ft.	101 to 200 Ft	201 to 250 Ft
375A/40%	#1 (42.4 mm2)	1/0 (53.5 mm2)	2/0 (67.4 mm2)

WORK CABLE CONNECTION

A 15ʼ (2/0) weld cable with clamp is available (K2150-1), or included with the Precision TIG Welding Package model. Otherwise, it is user provided.

With power source off, connect a separate work cable to the 1/2-13 threaded "WORK" stud of the welder, and secure a tight connection with the flange nut provided. The work cable should be routed through the cable strain relief hole provided in the base directly below the welding output terminal.

Note: If the Precision TIG is equipped with an Under- Cooler or Under-Storage unit, the coiled work cable and clamp, or excess work cable length, may be con- veniently stored in the drawer while remaining con- nected.

STICK ELECTRODE CABLE CONNECTION

If manual stick welding is desired, with power source off, connect a stick electrode cable to the 1/2-13 threaded "STICK Electrode" stud of the welder, and secure a tight connection with the flange nut provided. The electrode cable should be routed through the cable strain relief hole provided in the base directly below the welding output terminal.

WARNING

DISCONNECT STICK ELECTRODE WELDING CABLE WHEN TIG WELDING.

EVEN THOUGH HI-FREQ IS NOT APPLIED TO THE PRECISION TIG STICK TERMINAL, IT WILL BE ELECTRICALLY "HOT" TO WORK WHEN TIG WELDING.

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PRECISION TIG 375