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9-3. Correct Installation
6
8
Ground all metal ob-
jects and all wiring in
welding zone using
#12 AWG wire.
Nonmetal
Building
1
High-Frequency Source (welding power
source with built-in HF or separate HF
unit)
Ground metal machine case, 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.
Weld Zone
3
50 ft
(15 m)
1
2
4
Ground
workpiece
if required
by codes.
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 spec-
ifications.
50 ft
(15 m)
5
8
Metal Building
8
11
10
7
9
8
Ref. S-0695 / Ref. S-0695
Metal Building Requirements
9
Metal Building Panel Bonding Methods
Bolt or weld building panels together, install
copper straps or braided wire across seams,
and ground frame.
10 Windows and Doorways
Cover all windows and doorways with
grounded copper screen of not more than 1/4
in (6.4 mm) mesh.
11 Overhead Door Track
Ground the track.
OM-303 Page 23
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Table des Matières
