6
Electrical installation
WARNING ELECTRIC SHOCK CAN KILL
Electric Shock can kill –
Only qualified personnel should perform this installation. Turn off input power at
the fuse box before working on this equipment. Do not touch electrically live parts. Always connect the
machine to an earthed mains supply as per national recommended standards.
Machine grounding and Interference Protection
This welder must be grounded to earth. See national electrical codes for proper grounding methods.
The high frequency generator being similar to a radio transmitter may cause interference to radio, TV and
other electronic equipment. These problems may be the result of radiated interference.
Proper grounding methods can reduce or eliminate this.
Radiated interference can develop in the following ways
1. Direct interference from welder power source
2. Direct interference from the welding leads
3. Direct interference radiated from feedback into power lines
4. Interference from re
-
radiation by un
-
grounded metallic objects.
Keeping these contributing factors in mind, installing equipment as per following instructions should
minimize problems.
1. Keep the welder input power lines as short as possible and enclose as much of them as possible in met-
al conduit or equivalent shielding. There should be a good electrical contact between this conduit and
ground (Earth).
2. Keep the work and electrode leads as short as possible. Tape the leads together where practical.
3. Be sure the torch and earth leads rubber coverings are free from cuts and cracks that allow welding
power leakage
4. Keep earth lead connection to work in good condition –
Clean area on workbench where earth clamp is
situated on a regular basis.
