S9407-AB-HBK-010 Datasheet, PDF (228/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
The metal tags shall imprinted using stamped, etched, or indelible lettering. One such tag shall be
firmly attached near each end of each length of conduit. Attach tags over the braid of Type 1 conduit
and over the jacket of Type 2 conduit.
5.4 Unit packaging. The brazed ends (see 3.6.8) of each length of conduit shall be capped to
prevent entrance of foreign matter. Long lengths of conduit shall be furnished in coils or reels of
sufficient diameter to prevent excessive bending of the conduit. Excessive bending is considered to
be a bend radius less than 10 times the diameter of the conduit being coiled. Coils shall be securely
tied in three or more places equidistantly spaced around the circumference of the coil.
5.5 Wrapping. Conduit shall be wrapped in rust preventive paper or sealed in a plastic bags, and
packed in a manner that will ensure adequate protection of the conduit from physical chemical
damage during shipment and during long-term storage in adverse environments.
5.6 Marking of shipping containers. Shipping containers shall bear the information in indelible
lettering (reference MIL-STD-129):
a. EMI SHIELDING CONDUIT.
b. Part number (s) (see 1.2.2).
c. Length (s).
d. Manufacturer's name.
e. Manufacturer's part number (s).
f. Purchase order number.
g. Total weight.
h. Net weight.
Each container shall, in addition, be marked "HANDLE WITH CARE" and "DO NOT DROP."
6. NOTES
6.1 Intended use. The purpose of this conduit is to shield low-level signal cables from the
influence of external magnetic fields. It can also be used, within saturation limits of the conduit
material, to reduce magnetic field radiation from power and transmitting cables. The primary
frequencies of interest are those below 100 kHz.
6.1.1 Type 1 conduit. Type 1 nonjacketed conduit is used in installations where ground or
structureborne currents are minimal along the path of the conduit or where the cable being shielded is
not susceptible to interference from current flow along the conduit. (Conduit can become a conductor
for ground or structureborne currents through contacts with ground potentials along the length of the
conduit.)
6.1.2 Type 2 conduit. Type 2 conduit is used for shielding an extremely low-level signal cable which
would be susceptible to interference from current flowing along the conduit. The rubber jacket
prevents this current flow by electrically insulating the conduit from unintentional ground contacts.
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