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See the National Electrical Code for details on proper grounding methods. OUTPUT CONNECTIONS a. Wire Feeder Connection Turn the input power to the welder off. Remove the screw and lift the hinged door on the front of the control panel to expose the terminal strips. Connect the leads of the wire feeder input control cable to the terminal strips exactly as specified in the appropriate connection diagram. The AC-1200 to NA-4 connection diagrams are included in the NA-4 Operating Manual IM-278. Attach the control cables to the panel at the right of the terminal strip using the clamps provided. If connecting the AC-1200 to an older NA-4 with the toggle switch type ‘Current Control’ (below code 7532), a K-775 ‘Remote Control’ must be purchased and instal-led in accordance with the connection diagram S-15667 on page 5. The ‘Remote Control’ cord can be lengthened to any length by properly splicing a four conductor cord to the standard 25’ cord before connecting to the AC-1200 terminal strip. If connecting the AC-1200 to an LAF-4 or the AC controls of the LT-34 tractor, the AC-1200 must be ordered with the required ‘-NL’ optional circuit installed. This kit includes the K-775 ‘Remote Control’. Connect in accordance with diagram S-15666 on page 5. To connect the AC-1200 to any other wire feeder, write to the factory for instructions giving complete nameplate information for the specific equipment. When connection to the terminal strips are completed, close the door and replace the screw. RATING: IP21 ENCLOSURE, INSULATION 155(F) Recommended Input Wire, Grounding Conductor and Fuse Sizes Based on National Electrical Code - 100% Duty Cycle 40°C (104°F) Ambient Copper Wire Size - 75°C in Conduit Super Lag Fuses Input Amps Power Input Wires Grounding Conductor Size in Amps Input Voltage/ Hertz 1 Phase Scott Conn. 1 Phase T & B Term. Scott Conn. T & B Term. 1 Phase T & B Term. Scott T & B Conn. Term. 1 Phase Scott Conn. 460/60 182 209 #4/0 31013 250MCM 31013 #4 31007 #3 31007 300 350 440/50/60 190 219 #4/0 31013 250MCM 31013 #4 31007 #3 31007 300 350 380/50/60 230 254 250MCM 31013 350MCM 31015 #3 31007 #3 31007 300 400 Thomas & Betts wire terminals (or equal) recommended above are required to comply with applicable U.L. standards for safety. A #30 hex (Allen) key wrench is required for assembly of terminals to wire. IDEALARC® AC-1200 M ELECTRIC A-2 INSTALLATION A-2 Connection of AC-1200 (with NL Option) S-15666 to LAF-4 or LT-34 4-18-75 Connection of AC-1200 to NA-4 with Switch for ‘Current Control’ S-15667 4-18-75 Connection of AC-1200 to NA-4 with rheostat for current control or LT-6. AC - )200 WARNING; Turn power source off before making these connections. Connect the control cable ground lead to the frame terminal marked rr~7 near the power source terminal strip. The power source grounding terminal (marked and located near the power source Input power connections) must also be connected to electrical ground per the power source Operating Manual. H.A. Welding coblcs must be of proper capacity for the current and duty cycle of immediate and future applications. See the Operating Manual for proper sizes. N. B. Extend lead 21 using .'/I** or larger insulated wire physically suitable for the installation. An S-l65QS-£5^S refOtc voltage sensing work lead is available for this purpose. Connect it directly to the work piece keeping it electrically separate froi the v.eldinq work lead circuit and connect I or*. N . C. If using an older control cable- connect lead fi75 to //75 on terminal strip, connect lead //76 to 076 on terminal strip, connect lead 077 to #77 on terminal strip. N.0. To avoid possible induced NA-U or LT-6 meter reading error; keep the control leadSj Including the extended //21 lead separated from the A.C. welding cables by at least 12 inches. To Automat i c Control Box Electrode Cable to Automatic Connection Bar N. D. S-15602 6-22-84H IDEALARC® AC-1200 nnmEK ELECTRIC I A-3 INSTALLATION A-3 b. Output Studs Connect the work cables to the ‘To Work’ stud on the front of the Ac-1200. Connect the electrode cables to the ‘Min,’ ‘Med’ or ‘Max’ studs for the output desired. Actual current ranges for each stud are indicated on the nameplate above each stud. Recommended cable sizes are listed below. Both teh ‘To Work’ and ‘Max’ studs have two terminals to simplify connection of recommended cables in parallel. Tighten the nuts with a wrench. Select cables required for combined work and electrode cable lengths up to 150’ from the following table: Duty Cycle One 4/0 Two 4/0 Three 4/0 Four 4/0 100% 500 930 1150 1350 80%* 560 1040 1290 1510 * Based on 10 minute cycle. Maximum Allowable Current for Copper Welding Cable Cables in accessory kit recommended below have terminals as required to comply with applicable U.L. standards for safety. 150’ combined length electrode and work cables. c. Auxiliary Power 1000 volt-amperes of 115 volt AC power are ...