A-3
INSTALLATION
ASPECT™ 375
3. Be sure the torch and work cable rubber coverings are free of
cuts and cracks that allow high frequency leakage. Cables with
high natural rubber content, such as Lincoln Stable-Arc
®
, better
resist high frequency leakage than neoprene and other
synthetic rubber insulated cables.
4. Keep the torch in good repair and all connections tight to
reduce high frequency leakage.
5. The work piece must be connected to an earth ground close to the
work clamp, using one of the following methods:
• A metal underground water pipe in direct contact with the
earth for ten feet or more.
• A 3/4" (19 mm) galvanized pipe or a 5/8" (16 mm) solid
galvanized iron, steel or copper rod driven at least eight feet
into the ground.
The ground should be securely made and the grounding cable
should be as short as possible using cable of the same size as the
work cable, or larger. Grounding to the building frame electrical
conduit or a long pipe system can result in re-radiation, effectively
making these members radiating antennas. (This is not
recommended).
6. Keep all access panels and covers securely in place.
7. All electrical conductors within 50 feet (15.2 m) of the welder
should be enclosed in grounded rigid metallic conduit or
equivalent shielding. Flexible helically-wrapped metallic conduit
is generally not suitable.
8. When the welder is enclosed in a metal building, several good
earth driven electrical grounds (as in 5 above) around the
periphery of the building are recommended.
Failure to observe these recommended installation procedures can
cause radio or TV interference problems and result in unsatis-
factory welding performance resulting from lost high frequency
power.
INPUT CONNECTION
Only a qualified electrician should connect the input leads to
the ASPECT™ 375. Connections should be made in
accordance with all local and national electrical codes and
the connection diagrams. Failure to do so may result in
bodily injury or death.
A 10 ft. (3m) power cord is provided and wired into the machine.
For Single Phase Input
Connect green lead to ground per National Electrical Code.
Connect black and white leads to power.
Wrap red lead with tape to provide 600V insulation.
For Three Phase Input
Connect green lead to ground per National Electric Code.
Connect black, red and white leads to power.
This Class A equipment is not intended for use in residential
locations where the electrical power is provided by the
public low-voltage supply system. There may be potential
difficulties in ensuring electro-magnetic compatability in
those locations, due to conducted as well as radiated
disturbances.
INPUT FUSE AND SUPPLY WIRE
CONSIDERATIONS
Refer to Specification Section for recommended fuse, wire sizes
and type of the copper wires. Fuse the input circuit with the
recommended super lag fuse or delay type breakers (also called
"inverse time" or "thermal/magnetic" circuit breakers). Choose
input and grounding wire size according to local or national
electrical codes. Using input wire sizes, fuses or circuit breakers
smaller than recommended may result in "nuisance" shut-offs
from welder inrush currents, even if the machine is not being used
at high currents.
INPUT VOLTAGE SELECTION
The ASPECT™ 375 automatically adjusts to work with different
input voltages. No reconnect switches settings are required.
WARNING
WARNING
