Specifications

5
Conduit
Joint
Bonding
and
Grounding
Electrically
join
(bond)
all conduit
sections
using
copper
straps
or
braided
wire. Ground
conduit
every
50
ft
(15
rn).
6 Water
Pipes
and
Fixtures
Ground
water
pipes
every
SOft
(15
m).
7
External Power
or
lŁlephone
Lines
Locate
high-frequency
~ource
at
least
50
ft
(15
m)
away
from
power
and
phone
lines.
8
Grounding
Rod
Consult
the
National
Electrical Code for
specifications.
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.
Correct
Installation
.:..
~
..
.:
Ret S-0695
I Ret
S-0695
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
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~
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Metal
Building
OM-167
439
21