Job Info - Lesson 12 Flashcards
1) How far back should you strip the insulation to splice the conductors?
So the conductor goes fully into the connector and insulation fits closely into connectors
2) During the set-up process of wire pulling, why are conductors laid in a staggered position when making a rope pull?
To provide maximum flexibility around bends
3) The set-up process of pulling includes three single conductors, one each from three separate reels. How should these reels be set up?
Staggered
To maintain equal pulling tension and prevent conductor or cable crossover and jamming in the conduit
4) You are bending and terminating an aluminum TYPE SER cable that measures 1.601in. (OD). The insulation thickness of one of the conductors is .068 in. What is the minimum allowable bending radius?
5” (5 x the diameter of what you are dealing with.)
5) Name the two basic types of pressure connectors.
- Mechanical screw type
* Compression type applied with tool and die
7) What does the coating of joint compound remaining on the surface of the conductor prevent?
Oxidation
8) Only pressure-type connectors marded _______? or _____? to indicate that they have been tested and are listed by UL should be used interchangeably to connect aluminum, copper and aluminum to copper connections.
AL7CU; AL9CU
9) Belleville spring washers are NOT required to be used with which type of bolts or threaded studs.
a. Aluminum only
b. Aluminum and steel only
c. Copper and bronze only
d Copper, bronze and steel only
a. Aluminum only
10) Name two means of connecting aluminum feeders to equipment listed only for copper connections.
- Gutter splice use AL7CU, ALCU
* Listed adapter fitting
12) What temperatrue rating is associated with grounding clamps?
No temperature rating
14) The overall voltage drop for feeders and branch circuits should not exceed _____? percent
5%
15) What is the advantage to using cable pulling equipment of adequate power when installing cable into raceways or conduits?
To avoid unduly stressing the conductors and provide a steady tension on cables avoiding jerks
16) Why should large radius sheaves be used when pulling aluminum cable around bends of cable support trays?
To reduce the required pulling tension and to prevent damage to the wires or cables.
17) During the process of terminating an aluminum conductors in a mechanical screw-type connector, and after stripping the insulation off the conductor, the installer should _____? the conductor and apply a _______? on the exposed aluminum conductors.
Wire brush; Joint compound
18) most ______? are supplied by the manufacturer already filled with joint compound to seal the connector from moisture and other contaminants.
Compression connectors
