Recommended Installation To Reduce Hf Interference - Miller Dynasty 280 Series Owner's Manual

14-3. Recommended Installation To Reduce HF Interference

Best Practices Followed
6
8
9
1 High-Frequency Source (welding power
source with built-in HF or separate HF
unit)
Ground metal machine case (clean paint
from around hole in case, and use case
screw), work output terminal, line disconnect
device, input supply, and worktable.
2 Center Point Of Welding Zone
Midpoint between high-frequency source
and welding torch.
3 Welding Zone
A circle 50 ft (15 m) from center point in all
directions.
4 Weld Output Cables
Keep cables short and close together.
3 50 ft
(15 m)
1
2
4
13
5 Conduit Joint Bonding and Grounding
Electrically join (bond) all conduit sections
using copper straps or braided wire. Ground
conduit every 50 ft (15 m).
6 Water Pipes and Fixtures
Ground water pipes every 50 ft (15 m).
7 External Power or Telephone Lines
Locate high-frequency source at least 50 ft
(15 m) away from power and phone lines.
8 Grounding Rod
Consult the National Electrical Code for
specifications.
Ground all metal objects and all wiring in
welding zone using #12 AWG wire.
50 ft
(15 m)
5
8
8
12
7
11
10
8
Ground workpiece if required by codes.
9 Nonmetal Building
Metal Building Requirements
10 Metal Building
11 Metal Building Panel Bonding Methods
Bolt or weld building panels together, install
copper straps or braided wire across seams,
and ground frame.
12 Windows and Doorways
Cover all windows and doorways with
grounded copper screen of not more than 1/
4 in (6.4 mm) mesh.
13 Overhead Door Track
Ground the track.
OM-253086 Page 71