Connecting 1-Phase Input Power - Miller Axcess 300 Owner's Manual

3-13. Connecting 1-Phase Input Power

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5
2
3
5
4
6
1
Y Turn Off welding power source, and
check voltage on input capacitors
according to Section 8-1 before
proceeding.
Y Installation must meet all National and
Local Codes - have only qualified
persons make this installation.
Y Disconnect and lockout/tagout input
power before connecting
conductors form unit.
Y Make input power connections to the
welding power source first.
Y Always connect green or green/yellow
conductor to supply grounding terminal
first, and never to a line terminal.
.
The Auto-Line circuitry in this unit
automatically links the power source to the
primary voltage being applied. Check input
voltage available at site. This unit can be
connected to any input power between 208
and 575 VAC without relinking the power
source.
1 Input Power Conductors (Customer
Supplied Cord)
Select size and length of conductors using
Section 3-11. Conductors must comply with
1
= GND/PE Earth Ground
11
7
10
L1
2
L2
1
Tools Needed:
5/16 in
national, state, and local electrical codes. If
applicable, use lugs of proper amperage
capacity and correct hole size.
Three Conductor Power Cord Preparation
2 Black And White Input Conductors
(L1 And L2)
3 Red Input Conductor
4 Insulation Sleeving
input
5 Green Or Green/Yellow Grounding
Conductor
6 Electrical Tape
Insulate and isolate red conductor as shown.
Welding Power Source Input Power
Connections
7 Strain Relief
Install strain relief of proper size for unit and
input conductors. Route conductors (cord)
through strain relief and tighten screws.
S Use large strain relief for input conductor
size 8 and larger.
S Use small strain relief with reducing
washers for input conductor size 10.
Connect input conductors as shown in
illustration.
Route input power cable
through tubing inside unit.
Route ground conductor
through current transducer to
ground terminal.
Ref. 144 221 / Ref. 070 399-F / 803 668-A / Ref. 218 005-A
Route green or green/yellow grounding
conductor through current transducer and
connect to welding power source grounding
terminal first. Then connect input conductors L1
and L2 to welding power source line terminals.
Reinstall side panel onto welding power source.
Disconnect
Connections
8
9
Connect green or green/yellow grounding
conductor (see Item 5) to disconnect device
grounding terminal first.
10 Disconnect Device Line Terminals
Connect input conductors L1 and L2 to
disconnect device line terminals.
11 Overcurrent Protection
Select type and size of overcurrent protection
using Section 3-11 (fused disconnect switch
shown).
Close and secure door on line disconnect
device.
Device Input
Disconnect Device (switch shown in
OFF postion)
Disconnect Device (Supply) Grounding
Terminal
OM-216 967 Page 17
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Power