Fuse And Wire Sizes; Input Power Connections And Ground Connections - Lincoln Electric IDEALARC SP-255 Service Manual

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FUSE AND WIRE SIZES

Protect the input circuit with the super lag fuses or delay
type circuit breakers listed on the Technical Specifica-
tions page of this manual for the machine being used.
The tripping action of delay type circuit breakers de-
creases 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 "nuisance"
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 elec-
trical codes or see the Technical Specifications page
in this manual.
INPUT POWER CONNECTIONS
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 255 shipped with
a 10 ft. (3.0m) 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.
a. The center terminal in the receptacle is for the
grounding connection. See Figure A.2.
b. Fuse the two hot lines of the receptacle with
INSTALLATION
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 Technical Specifi-
cations table for proper wire sizes. For cable
lengths over 100 feet, larger copper wires should
be used.
FIGURE A.2. - Ground Connections.
AND
IDEALARC SP-255
®
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