6
Electrical Installation
WARNING!
ELECTRIC SHOCK CAN
KILL
Machine grounding and High Frequency Interference Protection
This plasma cutter 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 metal 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 lead 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.
Input Connections
Make sure the voltage, phase and frequency of input power is as specified on machine rating
plate located at rear of machine.
Have a qualified electrician provide suitable input power as per national electrical codes. Make
sure machine is earthed / grounded.
Make sure fuse or circuit breaker is correct rating. Using fuses or circuit breakers smaller than
recommended will result in ‘nuisance’ shut off from welder inrush currents even if cutting at low
amperages.
Failure to follow these instructions can cause immediate failure within the welder and void machines
warranty.
Turn the input power OFF at the mains switch & fuse box before working on this
