Craftsman 113.201170 Owner's Manual page 8

POWER SUPPLY
Connect the Arc Stabilizer toa 115volt, 60hz, singte
phase, 15 or' 20 ampere grounding receptacle.. All
wiring must comply with the National Electric Code
(ANSI C1) and local codes Refer tothe "Minimizing
RF Radiation" section of this manual for proper
power supply shietding practices.
NOTE: When the Arc Stabilizer is used with single
phase welders, the Arc Stabilizer- and welder must
be supplied from the same phase of the power
supply Unsatisfactory performance may result if
the Arc Stabilizer and welder are supplied from
different phases.
MINIMIZING RF RADIATION
These instructions must be followed exactly for
installation to comply with FCC Regulations.
General
High Frequency Arc Stabilizer installations will
produce some radio frequency electromagnetic
radiation.. Such RF Radiation, if the signal strength
is sufficient at the receiving device, can cause
inconvenience or disruption in communications or
cause malfunction in sensitive electronic controls
and systems or heart pacemakers. RF Radiation can
come from several sources
Direct Radiation from the High Frequency Arc
Stabilizer or Welder
Direct radiation is that radiation emanating directly
from the High Frequency Arc Stabilizer-or Welder.
Radiation from power line and welding circuit
attachments is not considered to be direct radiation
from the High Frequency Arc Stabilizer or Welder:
Direct Radiation from the Welding Circuit
Any attachment to the output terminals of the high
frequency source is capable of acting as an antenna
and transmitting radiation Attachments include
leads, torches, worktables, etc, either necessary or
unnecessary Since direct radiation from the
welding circuit is the major source of radiation, it is
important to keep attachments to a minimum
Conduction and Radiation from the Power Line
Most power lines are capable of conducting high
frequency energy which may cause interference
directly or by radiation from these power tines.. Most
conducted power fine radiation comes from direct
radiation picked up by the power lines and
reradiated.. Normalty such interference is small
when compared to that caused by radiation from the
welding leads
Re-radiation
Radiation from the welding circuit can be picked up
by ungrounded metal objects or unshielded wiring
in the immediate vicinity, conducted some distance,
and reradiated. This can bea troublesome source of
interference
Power Supply Shielding
Power supply conductors for both the Arc Stabilizer
and the welder must be completely enclosed in solid
metallic conduit for a distance of at least 50 feet
away from the Arc Stabilizer, welder, and welding
arc Joints in the conduit must be firmly electrically
bonded
Flexible helically wrapped conduit is not suitable for
this purpose The conduit must be well grounded at
the farthest point away from the Arc Stabilizer and
wetder..
The conduit enclosing the Arc Stabilizer power
supply conductors must extend to the receptacle
into which the High Frequency Arc Stabilizer is
plugged,.
When the welder has a flexible power cord, the
conduit enclosing the welder power supply
conductors must extend to the receptacle into
which the welder is plugged,
When the welder is not provided with a flexible
power' cord, the conduit must extend to the welder
enclosure and be firmly electrically bonded to it.,
Enclosure Covers and Access Doors
When the Arc Stabilizer is in operation, all enclosure
covers and access doors must be in place and
properly fastened..
Miscellaneous Wiring
Unshielded miscellaneous wiring such as lighting,
power, telephone communication, and other wiring
should be re-routed at least 50 feet away from the
Arc Stabilizer, welder, and welding arc. Where this is
not feasible, such wiring must be enclosed in solid
metallic conduit and grounded as described under
"Power Supply Shielding".
Miscellaneous Conducting Materials
Miscellaneous conducting materials should not be
located within 50 feet of the Arc Stabilizer, weeder,
and welding arc Such materials that can not be
excluded must be grounded.
Welding Leads
The welding leads should be kept as short as
possible and must not exceed 25 feet in length.
Eight foot Feads are provided with the Arc Stabilizer.
The werding leads should be kept as close together
as possible and should be kept as close to the
ground or floor as possible. Unnecessary
attachments to the welding leads, such as spare
torches or electrode holders, should not be used..
The magnitude of RF energy transmitted as well as
the frequency spectrum of such transmission may
be altered substantially by changing the length or
position of the welding leads..
Grounding the Welding Circuit
The enclosure of the Arc Stabilizer must be well
grounded.. The preferred ground connection is to a
ground rod at least 8 feet long, driven into moist soil.
In locations with low soil conductivity the soil
around the ground rod should be moistened or'
treated with a salt solution.
A cold water pipe may be used in place of the
ground rod provided it enters the soil within 10 feet
of the Arc Stabilizer
The grounding connection to the Arc Stabilizer may
be made to one of the enclosure screws_ The
enclosure must be scraped free of paint under' the
screw_ All electrical connections must be made with
clear] bright metal surfaces
The lead connecting the enclosure of the Arc
Stabilizer to the ground rod or' water pipe must be as
short as possible. In no case shall the length of
conductor between the enclosure of the Arc
Stabilizer and the point where the ground rod or
water pipe enters the soil exceed ten feet=
Metal Buildings
Installing the High Frequency Arc Stabilizer within
an electrically bonded and grounded metal buirding
can be an effective means of reducing RF Radiation.