Selecting Weld Cable Sizes; Connecting To Remote 14 Receptacle Rc14 - Miller Big Blue 300 PRO Series Owner's Manual

5-14. Selecting Weld Cable Sizes*

NOTICE − The Total Cable Length in Weld Circuit (see table below) is the combined length of both weld cables. For example, if the power source is
100 ft (30 m) from the workpiece, the total cable length in the weld circuit is 200 ft (2 cables x 100 ft). Use the 200 ft (60 m) column to determine cable
size.
Weld Output
Terminals
!
Stop engine before
connecting to weld
output terminals.
!
Do not use worn, dam-
aged, undersized, or
poorly spliced cables.
This chart is a general guideline and may not suit all applications. If cable overheats, use next size larger cable.
*
**Weld cable size (AWG) is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere.
2
( ) = mm for metric use
***For distances longer than those shown in this guide, call a factory applications rep. at 920-735-4505 (Miller) or 1-800-332-3281 (Hobart).

5-15. Connecting To Remote 14 Receptacle RC14

*The remaining sockets
are not used.
.
Accessories depend
on unit capabilities.
OM-259 355 Page 28
.
Complete Parts List is available at www.MillerWelds.com
Weld Cable Size** and Total Cable (Copper) Length in Weld Circuit
100 ft (30 m) or Less
10 − 60% 60 − 100%
Welding
Duty Duty
Amperes
Cycle Cycle
100 4 (20) 4 (20)
150 3 (30) 3 (30)
200 3 (30) 2 (35)
250 2 (35) 1 (50)
300 1 (50) 1/0 (60)
350 1/0 (60) 2/0 (70)
400 1/0 (60) 2/0 (70)
500 2/0 (70) 3/0 (95)
.
Not all models have contactor control. See description of front panel controls and
circuit diagram.
24 VOLTS AC
REMOTE
OUTPUT
CONTROL
OR
NEUTRAL
Rmt14_1 2010−04
Not Exceeding***
150 ft 200 ft
(45 m) (60 m)
10 − 100% Duty Cycle
4 (20) 3 (30)
2 (35) 1 (50)
1 (50) 1/0 (60)
1/0 (60) 2/0 (70)
2/0 (70) 3/0 (95)
3/0 (95) 4/0 (120)
3/0 (95) 4/0 (120)
2 ea. 2/0
4/0 (120)
(2x70)
Socket*
A 24 volts AC. Protected by supplementary protector.
B Contact closure to A completes 24 volt AC contactor
control circuit.
C Output to remote control:+10 volts DC in MIG mode;
0 to +10 volts DC in Stick or TIG mode.
D Remote control circuit common.
E DC input command signal: 0 to +10 volts from min.
to max. of remote control with Voltage/Amperage
Adjust control at maximum.
F Current feedback: 1 volt per 100 amperes.
H Voltage feedback: 1 volt per 10 arc volts.
K Chassis common.
GND
G Circuit common for 24 and 115 volt AC circuit.
250 ft 300 ft 350 ft
(70 m) (90 m) (105 m)
2 (35) 1 (50) 1/0 (60)
1/0 (60) 2/0 (70) 3/0 (95)
2/0 (70) 3/0 (95) 4/0 (120) 4/0 (120)
2 ea. 2/0
3/0 (95) 4/0 (120)
(2x70)
2 ea. 2/0 2 ea. 3/0
4/0 (120)
(2x70) (2x95)
2 ea. 2/0 2 ea. 3/0 2 ea. 3/0
(2x70) (2x95) (2x95)
2 ea. 2/0 2 ea. 3/0 2 ea. 4/0
(2x70) (2x95) (2x120)
2 ea. 3/0 2 ea. 4/0 3 ea. 3/0
(2x95) (2x120) (3x95)
Ref. S-0007-J 2011−07
Socket Information
400 ft
(120 m)
1/0 (60)
3/0 (95)
2 ea. 2/0
(2x70)
2 ea. 3/0
(2x95)
2 ea. 4/0
(2x120)
2 ea. 4/0
(2x120)
3 ea. 3/0
(3x95)