CHAPTER 6 REPAIR OF CABLE

CHAPTER 6

REPAIR OF CABLE

a. Grounded Conductor.

In checking for a

grounded conductor, the test is made between each

6-1. General

conductor and ground while the far end of the cable is

When a cable fault occurs, one or a combination of the

open.

following conditions may be found to exist: (1) One or

more of the conductors may be grounded, (2) there may

b. Short Circuit. In checking for a short circuit

be a short circuit between two or more conductors, (3) the

between conductors, the test is made between each of the

cable may be open circuited. Faults in exposed cable,

possible combinations of conductors An ground or by

joints, connections or equipment can usually be found by

testing each conductor with the o per conductors of the

visual inspection. Any source of dc potential connected to

cable ground.

the cable terminal through a voltmeter or a volt dc meter

resistance can be used to determine the type of fault. A

c. Open Circuit. The continuity of the conductors is

portable testing set megger of appropriate voltage! should

determined by tying the conductors together temporarily

be used to test isolated sections of cable after the ends

at the far end and then testing between each conductor

have been disconnected from feeders, buses or

and ground.

If the conductors are continuous, the

equipment.

voltmeter reads full voltage, the meter reads full voltage'

or the meager reads zero.

6-2. Test

6-1