Job Info - Lesson 7

Question 1

Improper electrical terminations lead to high _____? connections which in turn lead to electrical system ______?

Answer 1

Resistance ; Failures

Question 2

The first consideration in making good electrical connections is the type of conductor _____? invoved. The NEC recognizes copper, aluminum, and copper-clad aluminum, each of which has different ____? characteristics.

Answer 2

Material; Physical

Question 3

If conductors of dissimilar ____? are to be used, the termination device shall be _____? for use with both types.

Answer 3

Materials; Identified

Question 4

Splicing devices and _____? utilizing mechanical pressure are common in the electrical industry. Most commonly, screw-on wire _____? are used for splicing conductors.

Answer 4

Terminations; connectors

Question 5

5) The split-bolt connector utilizes mechanical pressure to establish a splice that maintains excellent mechanical and _____? properties. This type of splicing device is commonly used when _____? one conductor from another.

Answer 5

Electrical; Tapping

Question 6

6) Lugs are commonly used for both low-and medium-voltage applications. They are easy to use and are frequently found where power _____? conductors terminate in transformers and power ______?.

Answer 6

Distribution; Panelboards

Question 7

7) One disadvantage with lugs is that the termination is subject to ______? that may impact the overall _____? of the termination. Vibration or heat cycling may result in a loose connection that raises the resistance of the connection, thus subjecting the termination to an increased______?

Answer 7

Influences; Reliability; Temperature rises

Question 8

8) Compression connectors are also widely used within the electrical industry and can be utilized for both low-voltage and medium-voltage applications. The principle behind the compression connector is the application of _____? pressure, either ______? or by hand, to ensure the connection.

Answer 8

Irreversible ; Pneumatically

Question 9

9)when the termination is a terminal block, care must be taken to ensure a good electrical connection without_____? the conductor. Terminals should not be used for more than one conductor, unless they are ____? for such use.

Answer 9

Damaging; Identified

Question 10

10) If the splice is underground, the _____? shall be _____? for direct-burial use.

Answer 10

Device; Identified

Question 11

11) Equipment, such as conductors, are _____? according to how much heat _____? can occur at the conductor termination.

Answer 11

Rated; rise

Question 12

12) In general, equipment terminations for circuits rated 100 A or less or designed for f14 AWG through 1 AWG conductors are ____? for use on 60 degree C conductors. Conductors with a higher _____? insulation termination are allowed, Provided the conductor’s ampacity is selected from the _______? rating.

Answer 12

Rated; Electrical; Lowest temperature

Question 13

13) Both the conductor and equpment temperature ____? shall be considered when designing or installing electrical systems. The ampacity of the conductor shall be selected so that the lowest temperature ____? of the conductor or any equipment in the circuit is never _____?

Answer 13

Rating; Rating; Exceeded

Question 14

14) Prior to the advent of twist-on wire connectors, electrical connections were made by first _____? the electrical conductors together, then insulating the connection using electrical tape. The introduction of the twist-on wire connector revolutionized the electrical industy, offering electricians a(n)______? effective connector solution that provides a fast, reliable electrical connection.

Answer 14

Soldering; Cost

Question 15

15) Connectors are generally color-coded. Color-coding offers the electrical installer an indication of fthe connector’s _____? wire range capability. It does not however, indicate an exact wire range and may vary according to _____?.

Answer 15

Approximate; Manufacturer

Question 16

16) Twist-on wire connectors generally consist of two primary components, an internal coiled springwire and an outer connector shell. The internal spring wire provides ____? reliability, while the outer connector shell provides electrical _____? Properties.

Answer 16

Mechanical; Insulating

Question 17

17) Describe the proper step-by-step method for installing the Ideal Model 341 Twister wire connector.

Answer 17

• Turn off power prior to installing or removal of wirenuts
• Strip 1/2” of end of wire insulation.
• Align any framed strands or conductors.
• hold conductors evenly
• push wire into connector and screw on untill two twists are visible.

Question 18

18) List three types of specialty connectors described in the IDEAL reference material.

Answer 18

• Aluminum / copper connectors
• Grounding connectors
• Direct burial connectors

Question 19

19) In certain applications, it may be desired or ______? to make aluminum to copper connections. Only connectors or connector systems _____? listed for use in aluminum to copper connections should be used.

Answer 19

Required; UL

Question 20

20) Conductors should be stripped to a length using _____? stripping tools. Use of other methods, such as a pocket-knife, may damage, _____?, or cut the conductor strands.

Answer 20

Wire; Knick

Question 21

21) When joining solid and stranded conductors, as in fixtures and ballasts, it is recommended that the stranded conductor be positioned slightly _____? of the solid conductor. ______? the stranded conductor helps prevent this conductor from sliding down the solid conductor or backing out of the connector.

Answer 21

Ahead; Leading