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OM-225 216 Page 12
4-8. Electrical Service Guide For 240 VAC
Y CAUTION: INCORRECT INPUT POWER can damage this welding power source. This welding power
source requires a CONTINUOUS supply of 60 Hz (+10%) power at +10% of rated input voltage. Phase
to ground voltage shall not exceed +10% of rated input voltage. Do not use a generator with automatic
idle device (that idles engine when no load is sensed) to supply input power to this welding power
source.
Actual input voltage should not exceed ± 10% of indicated required input voltage. If
actual input voltage is outside of this range, output may not be available.
NOTE
60 Hz
Single
Phase
Input Voltage 240
Input Amperes At Rated Output 13.9
Max Recommended Standard Fuse Rating In Amperes
Circuit Breaker
1
, Time-Delay
2
15
Normal Operating
3
20
Min Input Conductor Size In AWG
4
14
Max Recommended Input Conductor Length In Feet (Meters)
91
(28)
Min Grounding Conductor Size In AWG
4
14
Reference: 2005 National Electrical Code (NEC) (including article 630)
1 Choose a circuit breaker with time-current curves comparable to a Time Delay Fuse.
2 “Time-Delay” fuses are UL class “RK5” .
3 “Normal Operating” (general purpose - no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” ( 65 amp and
above).
4 Conductor data in this section specifies conductor size (excluding flexible cord or cable) between the panelboard and the equipment per NEC Table
310.16. If a flexible cord or cable is used, minimum conductor size may increase. See NEC Table 400.5(A) for flexible cord and cable requirements.
Y Caution: Failure to follow these fuse and circuit breaker recommendations could create an electric shock or fire hazard. These
recommendations are for a dedicated branch circuit that applies to the rated output and duty cycle of the welding power source.
4-9. Extension Cord Data
When calculating max. cord length, remember to include conductor length from
line disconnect device to input power receptacle.
NOTE
Input Voltage
Input Power
Phase
Hertz Conductor Size Max. Cord Length
120 V 1 60 14 AWG 22 ft (7 m)
240 V 1 60 14 AWG 91 ft (28 m)