Miller Electric Inverter Rack manual Common Work Connections

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3-7. Common Work Connections

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YTurn Off welding power sources by placing Power circuit breakers in the Off position before making any weld output connections.

YDo not connect welding output of dif- ferent polarities to the same struc- ture.

YSee ANSI Z49.1 and OSHA Title 29, Chapter XVII, Part 1910, Subpart Q (addresses at beginning of manual).

YDo not handle or come in contact with two live electrodes at the same time.

YARCING can burn skin or damage electrical equipment. Do not change position of the welding cable connec- tors while welding.

YBe sure the connectors are secure in receptacles before welding.

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YINADEQUATE WORK CABLE CON- NECTIONS can cause serious dam- age to input power service and create a hazardous condition. Connect an electrical cable of adequate size be- tween the isolated terminal and the workpiece whenever the isolated ter- minal is used.

1 Positive (+) Weld Output Cables

Determine cable lengths and sizes accord- ing to welding power source Owner’s Manual.

2Isolated Terminal

3Negative (−) Weld Output Cables

Determine cable sizes according to welding power source Owner’s Manual. Cable must

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ST-801 700

reach from negative (−) output receptacle to isolated terminal.

4Common Negative (−) Weld Output Cable

Cable must be able to carry combined weld output of all welding power sources using common work connections. Use Section 3-6to select proper cable size.

5 Terminal Lugs

Use lugs of proper amperage capacity and hole size for connecting to isolated terminal. Isolated terminal is 1/2 in (12.7 mm) in diameter.

For Electrode Negative, reverse cable con- nections. Positive (+) weld output cables connect to isolated terminal, negative (−) weld output cables go to electrode. Common weld output cable is positive.

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Contents OM-818 ProcessesDescription From Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Pacemakers Identifie un message de sécurité particulier − Consignes DE Sécurité − À Lire Avant UtilisationLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Soudage peut causer un incen- die ou une explosionLES Particules Projetées peu- vent blesser les yeux LE Bruit peut affecter l’ouïe’EMPLOI Excessif peut Faire Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser LES Pièces Mobiles peuvent cau- ser des blessuresPrincipales normes de sécurité Information sur les champs électromagnétiquesConsignes relatives aux stimulateurs cardiaques Specifications For Racks Used With XMT 304/EX 300 Models RackDimensions And Weight Selecting a LocationMovement Installing Welding Power Source Onto Rack For XMT 304/EX 300 ModelsFor XMT 456 and Invision 456 Models Welding Power Source Input Power Connections Input Conductors Power Circuit Breaker TerminalsSelecting Cable Sizes ARC Welding can cause Electromagnetic InterferenceCommon Work Connections Paralleling Welding Power Sources For Smaw Securely cover connection with proper insulating materialPosition of the welding cable connec- tors while welding Connecting Input Power To Rack Electrical Service Guide For XMT 304 4-Racks Electrical Service Guide For XMT 304/EX 300 6-Racks− Maintenance & Troubleshooting Troubleshooting Overload Protection− Electrical Diagrams 184 139-B − Parts List Service SupportOwner’s Record Miller Electric Mfg. Co
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