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A-3
INSTALLATION
IDEALARC SP-250
A-3
FUSE AND WIRE SIZES
Protect the input circuit with the super lag fuses or
delay type circuit breakers listed on the Specifications
page of this manual for the machine being used. The
tripping action of delay type circuit breakers decreases
as the magnitude of the current increases. They are
also called inverse time or thermal/magnetic circuit
breakers.
DO NOT use fuses or circuit breakers with a lower amp
rating than recommended. This can result in "nui-
sance" tripping caused by inrush current even when
machine is not being used for welding at high output
currents.
Use input and grounding wire sizes that meet local
electrical codes or see the Specifications page in this
manual.
INPUT POWER CONNECTIONS AND
GROUND CONNECTIONS
Have a qualified electrician connect the receptacle or
cable to the input power lines and the system ground
according to the U.S. National Electrical Code and any
applicable local codes.
1. Follow the Input Supply Connection Diagram on
the inside of the Reconnect Panel Access Door.
2. Use a single-phase line or one phase of a three-
phase line.
For the 208V/230V/ 60 HZ model SP 250 shipped with
a 10 ft. input cord and plug connected to the welder,
mount the matching receptacle supplied with the
machine.
1. Mount the receptacle in a suitable location using
the screws provided.
2. Locate the receptacle within reach of the 10 ft.
input cord attached to the welder.
3. Mount the receptacle with the grounding terminal
at the top. This allows the power cable to hang
down without bending. See Figure A.2.
a. The center terminal in the receptacle is for the
grounding connection.
b. Fuse the two hot lines of the receptacle with
super lag type fuses as shown in Figure A.2. A
green wire in the input cord connects this ter-
minal to the frame of the welder. This ensures
proper grounding of the welder frame when the
welder plug is inserted into the receptacle.
4. Use proper wire sizes. See the Specification table
for proper wire sizes. For cable lengths over 100
feet, larger copper wires should be used.
FIGURE A.2. - Ground Connections.
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