Lincoln Electric — High Frequency Interference Protection
Installation · Installation / grounding
From a Lincoln Electric operator's manual — check it applies to your exact model before use.
Before you start
- Failure to observe these recommended installation procedures can cause radio or TV interference problems and unsatisfactory welding performance.
Procedure
- Keep the welder power supply lines as short as possible; enclose input leads within 50 feet (15.2 m) in rigid metallic conduit or equivalent shielding with good electrical contact to the welder.
- Keep the work and electrode leads as short as possible and as close together as possible; lengths should not exceed 25 feet (7.6 m).
- Be sure the torch and work cable rubber coverings are free of cuts and cracks that allow high frequency leakage.
- Keep the torch in good repair and all connections tight to reduce high frequency leakage.
- Connect the work terminal to a ground within ten feet of the welder using an approved grounding method.
- Keep all access panels and covers securely in place.
- Enclose all electrical conductors within 50 feet (15.2 m) of the welder in grounded rigid metallic conduit or equivalent shielding.
Specs & values
- Ground rod: 3/4" (19 mm) galvanized pipe or 5/8" (16 mm) solid galvanized iron, steel or copper rod driven at least eight feet into the ground
Source: Lincoln Electric operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.