Miller Electric NT 456 CV, NT 456 CC manual Electrical Service Guide, Placing Jumper Links

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4-12. Electrical Service Guide

Failure to follow these electrical service guide recommendations could create an electric shock or fire hazard. These recommenda- tions are for a dedicated branch circuit sized for the rated output and duty cycle of the welding power source.

60 Hertz Models

 

 

 

 

 

 

 

Input Voltage

230

460

575

 

 

 

 

Input Amperes At Rated Output

58

29

23

 

 

 

 

Max Recommended Standard Fuse Rating In Amperes 1

 

 

 

Time-Delay 2

70

35

25

Normal Operating 3

90

40

35

 

 

 

 

Min Input Conductor Size In AWG 4

6

10

10

 

 

 

 

Max Recommended Input Conductor Length In Feet (Meters)

145 (44)

243 (74)

380 (116)

 

 

 

 

Min Grounding Conductor Size In AWG 4

8

10

10

 

 

 

 

Reference: 2005 National Electrical Code (NEC)

 

 

 

1If a circuit breaker is used in place of a fuse, choose a circuit breaker with time-current curves comparable to the recommended fuse.

2“Time-Delay” fuses are UL class “RK5” .

3“Normal Operating” (general purpose − no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and above).

4Conductor data in this section specifies conductor size (excluding flexible cord or cable) between the panelboard and the equipment per NEC Table 310.16. If a flexible cord or cable is used, minimum conductor size may increase. See NEC Table 400.5(A) for flexible cord and cable requirements.

4-13. Placing Jumper Links

! Disconnect and lockout/tag- out input power before installing or moving jumper links.

Check input voltage available at site.

1 Jumper Link Label Check label.

2 Jumper Links

Move jumper links to match input voltage.

Close access door, or go on to Section 4-14.

1

Connect L1(U)

GND/PE L2(V)

Conductor L3(W)

First.

GND/PE

Tools Needed: 3/8 in

3/8 in

Donot

 

 

overtighten

 

 

jumper linknuts.

230VOLTS

 

Input

575VOLTS

3

 

 

Contactor

460VOLTS

S−174973−B

2

Ref. 800 103-A

OM-2243 Page 19

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Contents File Multiprocess OM-2243212 113TProcesses DescriptionFrom Miller to You Table of Contents Page HOT Parts can cause severe burns Symbol UsageArc Welding Hazards Electric Shock can killFlying Metal or Dirt can injure eyes Fumes and Gases can be hazardousARC Rays can burn eyes and skin Welding can cause fire or explosionMoving Parts can cause injury Welding Wire can cause injuryFire or Explosion hazard Falling Unit can cause injuryAbout Implanted Medical Devices Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationUNE Décharge Électrique peut entraîner la mort Symboles utilisésLE Soudage peut provoquer un in cendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux LA Chute DE L’APPAREIL peut blesser LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées Risque D’INCENDIE OU D’EXPLO- SionLE Soudage À L’ARC risque de provoquer des interférences Proposition californienne 65 AvertissementsLES Fils DE Soudage peuvent provoquer des blessures En ce qui concerne les implants médicaux Principales normes de sécuritéInformation EMF OM-2243 − Definitions Nameplate Safety SymbolsDuty Cycle And Overheating − InstallationSpecifications 100 200 300 400 500 600 CC ModeCV Mode Volt-Ampere CurvesMovement Location Selecting a LocationWeight Dimensions And WeightsDimensions VAC Receptacle And Circuit Breakers Be careful when placing or moving unit over uneven surfacesTurn Off power before connecting to receptacle TippingWeld Output Terminals And Selecting Cable Sizes Connecting Weld Output CablesSocket Connecting Remote ControlTurn off power before con Remote 14 Receptacle InformationPlacing Jumper Links Electrical Service Guide= GND/PE Earth Ground Connecting Input PowerWelding Power Source Input Power Connections Disconnect Device Input Power Con- nectionsControls − OperationMeter Functions For CC/CV Models Touch Seconds Do not Strike Like a Match Lift-Arc TIG Procedure For CC/CV ModelsDisconnect input power be- fore opening rear access door − Maintenance & TroubleshootingRoutine Maintenance Disconnect power before maintainingVoltmeter/Ammeter Help Displays HE.LTrouble Remedy TroubleshootingCircuit Diagram For NT 456 CC/CV Models − Electrical DiagramMain Assembly − Parts ListTHERMISTOR, NTC 10K OHM @ 25 DEG C 34IN Lead 14 12 274 Panel, Front With ComponentsPanel, Front With Components -1Item IGBT/Capacitor Assembly 221 IGBT/Capacitor Assembly -1itemPanel, Rear With Components Support ServiceYour distributor also gives Your distributor and/or equipment manufacturer’s To locate a Distributor or Service Agency visitMiller Electric Mfg. Co For assistance in filing or settling claims, contact