Table 2-1.-Cab1e Classifications

SPECIAL USE.-- There are many shipboard

cold, dampness, dryness, bending, crushing, vibration,

electrical circuits where special requirements of

twisting, and shock. No one type of cable has been

voltage, current, frequency, and service must be met

designed to meet all of these requirements; therefore,

in cable installation. There are also other circuits

a variety of types are employed in a shipboard cable

where general use, nonflexing service cable may meet

installation.

the necessary requirements, yet be economically

Cables are classified as watertight or nonwater-

impracticable. For these reasons, there are many

tight, watertight with circuit integrity construction or

different types of nonflexing service cable for

nonwatertight with circuit integrity construction, and

armored or unarmored. They are also further classified

Table 2-1.-Cab1e Classifications

for flexing or nonflexing service for power, lighting,

control, electronic, and communication and instru-

mentation applications. Table 2-1 shows the various

MIL-C-24643

classifications for cable.

Watertight with circuit integrity nonflexing service

Power and Lighting

Watertight Cable

Control

Electronic, Communication, and Instrumentation

The term watertight cable indicates standard cable

Watertight, nonflexing service

in which all spaces under the impervious sheath are

Power and Lighting

filled with material. This eliminates voids and

Electronic, Communication, and Instrumentation

prevents the flow of water through the cable by hose

Nonwatertight with circuit integrity, nonflexing service

action if an open end of cable is exposed to water under

Electronic, Communication, and Instrumentation

pressure.

Nonwatertight, nonflexing service

Power and Lighting

Armored Cable

Control

Electronic, Communication, and Instrumentation

The term armored cable refers to a cable that has

Nonwatertight, flexing service

an outer shield of weaved braid. The braid is made of

Power and Lighting

Control

aluminum or steel and applied around the impervious

Electronic, Communication, and Instrumentation

sheath of the cable. This weaved braid helps prevent

damage to the cable during installation.

MIL-C-24640

Watertight with circuit integrity, nonflexing service

Nonflexing Service

Power

Control

Electronic, Communication, and Instrumentation

Nonflexing service cable designed for use aboard

ship is intended for permanent installation and is

Watertight, nonflexing service

Electronic, Communication, and Instrumentation

commonly referred to as such. Cables for use with

lighting and power circuits are intended for this

Nonwatertight, nonflexing service

nonflexing service. This nonflexing service can be

Power

Electronic, Communication, and Instrumentation

further classified according to its application and is of

two types-general use and special use.

MIL-C-915

GENERAL USE.-- Nonflexing service cable is

Watertight, flexing service

Control

intended for use in nearly all portions of electric

Electronic, Communication, and Instrumentation

distribution systems, including the common telephone

Power

circuits and most propulsion circuits. Special cases

Nonwatertight, flexing service

occur in dc propulsion circuits for surface ships. In

Power and lighting

those cases where the impressed voltage is less than

Electronic, Communication, and Instrumentation

1000 volts, an exception is permitted.

Nonwatertight, nonflexing service

Electronic, Communication, and Instrumentation

LSDSGA cable is one type usually found in this

general use, nonflexing service. Also in this

Watertight, nonflexing service

Electronic, Communication, and Instrumentation

classification is the type LSMSCA cable. This cable

is nothing more than watertight cable for use in

interior communications, as well as in FC circuits.

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