Miller Electric Welder Electrical Service Guide, Connecting Input Power, Three-Phase

3-7. Electrical Service Guide

	Three-Phase
Input Voltage
	400
Input Amperes At Rated Output	31
Max Recommended Standard Fuse Or Circuit Breaker Rating In Amperes	45
Min Input Conductor Size In AWG/Kcmil	10
Max Recommended Input Conductor Length In Feet (Meters)	264 (80)
Min Grounding Conductor Size In AWG/Kcmil	10
Reference: 1993 National Electrical Code (NEC).	S-0092J

3-8. Connecting Input Power

Input Filter

Board

L1

L2

=GND/PE

YAlways connect grounding conductor first.

L3

2

L1

L21

L3

Tools Needed:

5/16 in

ssb2.4* 1/94 – ST-801 718 / ST-801 946

YTurn Off welding power source, and check voltage on input capacitors ac- cording to Section 5-3 before proceeding.

Check input voltage available at site.

Remove left side panel.

1Input And Grounding Conductors See Section 3-7.

Install ring terminals of proper size onto input conductors for connection to input filter board terminals (see illustration).

2 Line Disconnect Device

Select type and size of overcurrent protec- tion using Section 3-7. Connect input and grounding conductors to a deenergized line disconnect device.

Reinstall left side panel.

OM-196 188 Page 15