OM-285986 Page 17
�
Complete Parts List is available at www.MillerWelds.com
5-7.
Electrical Service Guide
Failure to follow these electrical service guide recommendations could create an electric shock or fire hazard. These recommen-
dations are for an individual branch circuit sized for the rated output and duty cycle of one welding power source. In individual
branch circuit installations, the National Electrical Code (NEC) allows the receptacle or conductor rating to be less than the rating
of the circuit protection device. All components of the circuit must be physically compatible. See NEC articles 210.21, 630.11, and
630.12.
NOTICE –
Actual input voltage should not be 10% less than minimum and/or 10% more than maximum input voltages listed in table. If actual in-
put voltage is outside this range, output may not be available.
NOTICE –
INCORRECT INPUT POWER can damage this welding power source. Phase to ground voltage shall not 10% of rated input
voltage.
60 Hz 1-Phase
60 Hz 3-Phase
Rated Supply Voltage (V)
208
230
400
460
575
208
230
400
460
575
Rated Maximum Supply Current
I
1max
(A)
33.7
30.7
17.6
16.2
14.5
29.6
26.7
15.7
13.9
12.1
Rated Effective Supply Current
I
1eff
(A)
23.1
20.6
13.6
11.8
11.2
18.9
17.1
10.6
9.4
8.0
Maximum Recommended Standard Fuse Rating In
Amperes
1
Time Delay Fuses
2
40
35
20
20
15
35
30
20
15
15
Normal Operating Fuses
3
50
45
25
20
20
40
40
20
20
15
Maximum Recommended Supply Conductor Length
In Feet (Meters)
4
79
(24)
98
(30)
119
(36)
158
(48)
247
(75)
63
(19)
77
(23)
152
(46)
203
(62)
318
(97)
Raceway Installation
Minimum Supply Conductor Size In AWG (mm
2
)
5
10
(6)
10
(6)
14
(2.5)
14
(2.5)
14
(2.5)
12
(4)
12
(4)
14
(2.5)
14
(2.5)
14
(2.5)
Minimum Grounding Conductor Size In AWG (mm
2
)
5
12
(4)
12
(4)
14
(2.5)
14
(2.5)
14
(2.5)
12
(4)
12
(4)
14
(2.5)
14
(2.5)
14
(2.5)
Flexible Cord Installation
Minimum Supply Conductor Size In AWG (mm
2
)
6
12
(4)
12
(4)
14
(2.5)
14
(2.5)
14
(2.5)
12
(4)
12
(4)
14
(2.5)
14
(2.5)
14
(2.5)
Reference: 2020 National Electrical Code (NEC) (including article 630)
1 If 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" . See UL 248.
3 "Normal Operating" (general purpose - no intentional delay) fuses are UL class "K5" (up to and including 60 amps), and UL class "H" ( 65 amps
and above).
4 Maximum total length of copper input conductors in entire installation, raceway and/or flexible cord.
5 Raceway conductor data in this section specifies conductor size (excluding flexible cord or cable) between the panelboard and the equipment
per NEC Table 310.15(B)(16) and is based on allowable ampacities of insulated copper conductors having a temperature rating of 75°C (167°F)
with not more than three single current-carrying conductors in a raceway.
6 Flexible cord conductor size is based on NEC Table 400.5(A)(1) for SOOW 600V 90°C (194°F) jacketed cable in a 30°C (86°F) ambient tem-
perature. See NEC Table 310.15(B)(2)(a) for ambient temperature correction factors. Flexible cord used for connection to the power supply sys-
tem shall comply with the requirements of CSA C22.2 No. 49.
Summary of Contents for CST 282
Page 6: ......
Page 34: ...OM 285986 Page 28 SECTION 8 ELECTRICAL DIAGRAMS Figure 8 1 Circuit Diagram For CST 282...
Page 35: ...OM 285986 Page 29...
Page 40: ...Notes...
