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 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.
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 for machine. 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 equipment. Have a qualified electrician
install & service this equipment. Allow machine to sit for 5 minutes minimum to allow the power capacitors to discharge
before working inside this equipment. Do not touch electrically live parts
