Quantcast Figure 2-45.-Cables installed in a cable rack.
 

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Cables must be supported so the sag between
CABLE RACK.-- A more complex cable support
supports, when practicable, will not exceed 1 inch.
is the cable rack, which consists of the cable hanger,
Five rows of cables may be supported from an
cable strap, and hanger support (fig. 2-45).
overhead in one cable rack; two rows of cables may
Banding material is five-eighths of an inch wide
be supported from a bulkhead in one cable rack. As
many as 16 rows of cables may be supported in main
and may be zinc-plated steel, corrosion-resistant steel,
cableways, in machinery spaces, and boiler rooms.
or aluminum, depending on the requirements of the
Not more than one row of cable should be installed on
installation. For weather-deck installations, use
a single hanger.
corrosion-resistant steel band with copper-armored
MODULAR CABLE SUPPORTS.-- Modular
cables; zinc-coated steel with steel armor; and
cable supports (fig. 2-46) are installed on a number of
aluminum with aluminum armor.
naval ships. The modular method saves over 50
When applying banding material, apply one turn
percent in cable-pulling time and labor. Groups of
of banding for a single cable less than 1 inch in
cables are now passed through wide opened frames
instead of inserted individually in stuffing tubes. The
diameter. Apply two turns of banding for single cables
frames are then welded into the metal bulkheads and
of 1 inch or more in diameter and for a row of cables.
decks for cable runs.
Apply three turns of banding for partially loaded
hangers where hanger width exceeds the width of a
The modular method of supporting electrical
single cable or a single row of cable by more than
cables from one compartment to another is designed
to be fireproof, watertight, and airtight.
one-half inch.
Figure 2-45.-Cables installed in a cable rack.
2-42

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