Figure 2-51.Connecting cable to a junction box.

Sealing plugs are available for sealing nylon

that additional grounding is necessary within

stuffing tubes from which the cables have been

electronic spaces. In this case, the cable armor is

removed. The solid plug is inserted in place of the

flared and trimmed to the outside diameter of

grommet, but the slip washers are left in the tube

the slip washers. One end of the ground strap is

inserted through the cap; and one washer is

flared and trimmed to the outside diameter of

the washers. Contact between the armor and the

A grounded installation that provides for cable

strap is maintained by pressure of the cap on the

entry into an enclosure equipped with a nylon

slip washers and the rubber grommet.

stuffing tube is shown in figure 2-50. This type of

installation is required only when radio interference

tests indicate

Watertight integrity is vital aboard ship in

peacetime or in combat. Just one improper cable

installation could endanger the entire ship. For

example, if a cable is replaced by a newer cable

of a smaller size and the fittings passing

through a watertight bulkhead are not changed

to the proper size, the result could be two

flooded spaces in the event of a collision or

enemy hit.

Kickpipes and Deck Risers

Where one or two cables pass through a deck in a

single group, kickpipes are provided to protect the

cables against mechanical damage. Steel pipes are

used with steel decks, and aluminum pipes with

aluminum and wooden decks. When stuffing tubes

and kickpipes are installed, care must be taken not to

install two different metals together; an electrolytic

action may be set up. Inside edges on the ends of the

Figure 2-50.--Nylon stuffing tube grounded

pipe and the inside wall of the pipe must be free of

installation.

140.15

Figure 2-51.--Connecting cable to a junction box.