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4-8. Electrical Service Guide

Failure to follow these electrical service guide recommendations could create an electric shock or fire hazard. These recommenda-

tions are for a dedicated branch circuit sized for the rated output and duty cycle of the welding power source.

NOTICE − Actual input voltage should not be 10% less than minimum and/or 10% more than maximum input voltages listed in table. If actual input

voltage is outside this range, output may not be be available.

Input Voltage (V)

Input Amperes (A) At Rated Output

Max Recommended Standard Fuse Rating In Amperes

Min Input Conductor Size In AWG

Max Recommended Input Conductor Length In Feet (Meters)

Min Grounding Conductor Size In AWG

Elec Serv 2011−04

Reference: 2011 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 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). 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.

4-9. Extension Cord Data

When calculating max. cord length, remember to include conductor length from line disconnect device to input power receptacle.

Single Phase AC

Input Voltage

115

230

*Conductor size is based on maximum 3% voltage drop

4-10. Primary Changeover Switch

Check input voltage available at site.

Changeover Switch

Switch is accessible through slot in rear

panel.

Changeover Switch Label

Look at label to find correct switch position.

OM-255 590 Page 16

A complete Parts List is available at www.MillerWelds.com

Time-Delay Fuses

Normal Operating Fuses

6 (13.3)

8 (8.4)

156 (48)

98 (30)

624 (190)

391 (119)

Be sure input power connection

meets all

regional, and local electrical codes.

Grounded 120 VAC

Receptacle

use

specifications), connect the unit to

Conductor Size − AWG (mm

10 (5.3)

Maximum Allowable Cord Length in ft (m)

62 (19)

246 (75)

applicable

national,

rated

output

(see

50/60 Hz Single Phase

115

230

A 15 or 20

ampere individual

branch circuit

protected by

time-delay fuses

or circuit breaker

is required.

See Section 4-1

(29)

12 (3.3)

14 (2.1)

39 (12)

24 (7)

155 (47)

98 (30)

Ref. 802 787-C

an individual branch circuit capable

of carrying the effective (eff) current

for the output being used. The unit

must have a properly sized plug

installed and the circuit must be

protected by properly sized fuses

or circuit breakers.