Miller Electric MARK VIII-2 Parallel Module Connections, Separate Work Connections Common Work

B. Parallel Module Connections

YREAD SAFETY BLOCKS at start of Section 4-6before proceeding. UNDERSIZED WELDING CABLES can cause fire.

Use single cables of adequate capacity to carry the total combined am- perage of the paralleled modules (see Section 4-4) .

Securely cover common connections with proper insulating materials.

Set the Amperage Adjustment controls on all paralleled modules to provide the same output.

Securely cover con- nection with proper insulating material.

1 Cable Restraint

Route all cables under cable restraint.

Separate Work Connections

See Section 4-4for proper cable size.

2Negative (−) Weld Output Terminal

3Electrode Holder Cable

4Positive (+) Weld Output Terminal

5Work Cable

6Connection Point

For Electrode Negative (Straight Polarity/DCEN), connect separate cables of same size and length from Positive (+) terminals to the work or to a suitable connection point con- necting to a single work cable. Connect separate cables of same size and length from Negative (−) terminals to a suitable connection point connecting to a single elec- trode holder cable.

For Electrode Positive (Reverse Polarity/DCEP), reverse cable con- nections.

Common Work Connections

Separate Work

Connections

Common Work

Connections

Tools Needed: 1-1/4 in

7

8

6

1

2

3

4

5

9

10

3

YFor common work connection, work cable must be able to carry combined weld output of all modules using the common work connection terminal (see Table 3-1for proper cable size). When using the common work con- nection terminal, all connections to the common work connection terminal must be of the same polarity.

7Common Work Connection Terminal

8Common Work Cable

See Table 3-1for proper size cable.

9Frame Connection Terminal

10Jumper Link

For Electrode Negative (Straight Polarity/DCEN), connect jumper link across Positive (+) terminal and Frame Connection terminal for each paralleled module. Connect separate cables of same size and length from Negative (−) terminals to a suitable connection point con- necting to a single electrode holder cable.

For Electrode Positive (Reverse Polarity/DCEP), connect jumper link across Negative (−) terminal and Frame Connection terminal for each paralleled module, and con- nect separate cables of same size and length from Positive (+) termi- nals to a suitable connection point connecting to a single electrode holder cable.

ST-085 152-D

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