# Don't Get Your Wires Crossed

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Test your wiring knowledge in this month's quiz. Do you know the proper procedures when it comes to handling wires and cables?

• 1.

### When bending 8 conductor / 4 pair UTP cable the bend should not be less than ____ times the cable ____.

• A.

• B.

8 / diameter

• C.

2 / circumference

• D.

4 / diameter

• E.

Makes no difference on UTP cable

D. 4 / diameter
Explanation
When bending a UTP cable, it is important to ensure that the bend radius is not less than 4 times the cable diameter. This is because bending the cable too tightly can cause signal loss and interference, leading to poor performance or even complete failure of the cable. By maintaining a minimum bend radius, the cable's integrity and signal quality are preserved, ensuring optimal performance.

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• 2.

### Nonconductive optical fiber cables shall be permitted to occupy the same cabinet, panel or similar enclosure of Class 1 circuits.

• A.

True

• B.

False

B. False
Explanation
Nonconductive optical fiber cables should not be permitted to occupy the same cabinet, panel, or similar enclosure of Class 1 circuits. This is because Class 1 circuits are high-voltage circuits that carry a significant amount of electrical energy. Mixing nonconductive optical fiber cables with Class 1 circuits could potentially create a safety hazard, as the nonconductive cables may not provide adequate insulation from the high voltage present in the Class 1 circuits. Therefore, it is important to keep nonconductive optical fiber cables separate from Class 1 circuits to ensure the safety and integrity of the electrical system.

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• 3.

### When referring to cable terminations, the “RJ” designation means _____.

• A.

Restricted Jack

• B.

Registered Junction

• C.

Registered Jack

• D.

Revised Joint

C. Registered Jack
Explanation
The "RJ" designation in cable terminations stands for Registered Jack. This term refers to a standardized interface used for connecting telecommunications equipment. The Registered Jack system was developed by the Bell System in the 1970s to ensure compatibility and ease of use in telephone networks. The RJ designation is followed by a number that indicates the specific wiring configuration and functionality of the jack.

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• 4.

### ____ is a connector for high-speed Category 7 (S/FTP) cabling systems.

• A.

GG45

• B.

RJx45

• C.

BP101

• D.

RJ11

A. GG45
Explanation
GG45 is a connector specifically designed for high-speed Category 7 (S/FTP) cabling systems. It provides a reliable and efficient connection for transmitting data at high speeds. Unlike other options listed, such as RJx45 and RJ11, GG45 is specifically designed for Category 7 cabling systems, making it the correct answer in this context. BP101 is not a known connector for cabling systems, so it can be ruled out as the correct answer.

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• 5.

### According to the NEC, wires are measured in AWG and ____.

• A.

Mils

• B.

Kmils

• C.

Kcmils

• D.

Inches

C. Kcmils
Explanation
The National Electrical Code (NEC) states that wires are measured in American Wire Gauge (AWG) and kcmils. AWG is used to measure the diameter of the wire, while kcmils is used to measure the cross-sectional area of the wire. This allows for a more precise measurement and calculation of the wire's capacity to carry current. Therefore, the correct answer is kcmils.

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• 6.

### On an 8-pin jack, which colors are used for pair 2?

• A.

Blue / White-Blue

• B.

White-Brown / Brown

• C.

White-Orange / Orange

• D.

White-Green / Green

C. White-Orange / Orange
Explanation
The correct answer is White-Orange / Orange. This is because in an 8-pin jack, pair 2 is represented by the colors White-Orange and Orange. Each pair in an 8-pin jack is assigned a specific color combination, and in this case, White-Orange and Orange are used to represent pair 2.

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• 7.

### Communications wires and cables shall be separated at least ____ from electric light or power conductors not in a raceway.

• A.

2 inches

• B.

4 inches

• C.

3 feet

• D.

7 meters

B. 4 inches
Explanation
Communications wires and cables need to be separated at least 4 inches from electric light or power conductors not in a raceway. This distance is necessary to prevent interference and potential damage to the communication signals caused by the electrical power conductors. By maintaining a separation of 4 inches, the risk of cross-talk or electromagnetic interference is minimized, ensuring proper communication transmission and safety.

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• 8.

### According to Table C.1 of the NEC, the maximum number of conductors of type THHN, with a size of 12 AWG, permitted to be in a ¾ inch EMT conduit is _____.

• A.

4

• B.

7

• C.

16

• D.

24

C. 16
Explanation
According to Table C.1 of the NEC, the maximum number of conductors of type THHN, with a size of 12 AWG, permitted to be in a ¾ inch EMT conduit is 16.

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• 9.

### The "skin effect is _____.

• A.

The “peeling” back of the outer layer of coax cable due to extreme temperatures

• B.

The tendency of alternating current, as its frequency increases, to travel only on the surface of a conductor

• C.

The irritation caused by handling untreated coaxial cable much like that of fiberglass insulation

• D.

The method by which the skin of a coaxial cable is properly “stripped” and the center conductor is exposed

B. The tendency of alternating current, as its frequency increases, to travel only on the surface of a conductor
Explanation
The skin effect refers to the tendency of alternating current, as its frequency increases, to travel only on the surface of a conductor. This means that at higher frequencies, the current flows primarily on the outer layer of the conductor, while the inner layers carry less current. This phenomenon occurs because at higher frequencies, the current experiences greater resistance in the conductor's core, causing it to concentrate on the surface where the resistance is lower.

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• 10.

### A ____ has the following characteristics: 125-micron cladding diameter and increased bandwidth with a smaller size.

• A.

Single-mode optical fiber

• B.

Multimode 62.5-micron fiber

• C.

Multimode 50-micron fiber

• D.

Glass-encased optical fiber

C. Multimode 50-micron fiber
Explanation
A multimode 50-micron fiber has a smaller cladding diameter compared to a multimode 62.5-micron fiber. This smaller size allows for increased bandwidth, meaning it can carry more data over longer distances. Additionally, being a multimode fiber, it supports multiple modes or paths for light to travel through, which allows for greater flexibility in transmitting signals. Overall, the characteristics of a multimode 50-micron fiber make it suitable for applications that require higher bandwidth and smaller size.

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• 11.

### Which is a true statement?

• A.

CMX cable shall be permitted to be used in place of CATVX.

• B.

CATV cable shall be permitted to be used in place of CMP.

• C.

CMG cable shall be permitted to be used in place of CMP.

• D.

FPLR cable shall be permitted to be used in place of CMP.

A. CMX cable shall be permitted to be used in place of CATVX.
Explanation
The correct answer is CMX cable shall be permitted to be used in place of CATVX. This is because CMX cable is a type of cable that is suitable for outdoor use, while CATVX cable is specifically designed for use in cable television systems. Therefore, CMX cable can be used as a substitute for CATVX cable.

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• 12.

### A fiber optic ____ connector has a 2.5mm ferrule tip with screw-on mechanism. It is keyed to prevent tip rotation and damage to the mated fiber. It is typically used for single-mode applications.

• A.

ST

• B.

FC

• C.

SC

• D.

LC

B. FC
Explanation
The correct answer is FC. The FC (Fiber Connector) connector has a 2.5mm ferrule tip with a screw-on mechanism. It is designed to prevent tip rotation and damage to the mated fiber. The FC connector is commonly used for single-mode applications.

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• 13.

### The maximum spacing between supports permitted by the NEC for Rigid Polyvinyl Chlorid Conduit, trade size 1¼ - 2, is ____.

• A.

12 inches

• B.

3 feet

• C.

5 feet

• D.

7 feet

C. 5 feet
Explanation
The NEC (National Electrical Code) sets guidelines for the installation of electrical systems. In this case, the question is asking about the maximum spacing between supports for Rigid Polyvinyl Chloride (PVC) Conduit, trade size 1¼ - 2. The correct answer is 5 feet. This means that when installing this type of conduit, the supports or hangers must be placed no further apart than 5 feet to ensure proper support and prevent sagging or damage to the conduit.

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• 14.

### The requirements of Section 300.22(A) of the 2014 NEC do not apply to conductive optical fiber cables in ducts used for dust, loose stock or vapor removal.

• A.

True

• B.

False

B. False
Explanation
The statement is false because the requirements of Section 300.22(A) of the 2014 NEC do apply to conductive optical fiber cables in ducts used for dust, loose stock, or vapor removal. This means that these cables must meet the specific requirements outlined in the NEC for their installation and use in these types of ducts.

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