Low Votlage

Question 1

1.1.1

What AWG wire size is capable of carrying the most current?

Answer 1

8 thicker Gauge

Question 2

1.1.2

What is the standard conductor material for low voltage cable?

Answer 2

Is annealed (soft) solid copper

Question 3

1.1.2

What insulation is commonly used on plenum rated cable?

Answer 3

PTFE/ Teflon

High temperature insulation

Question 4

1.2.0

The NEC requires that low voltage and optical fiber cables be listed and marked with appropriate classification codes?

Answer 4

The requirements excludes optical fiber or communication cables that enter a structure and are terminated in an enclosure within 50’ of the entrance.

Question 5

1.3.6. Optical fiber cable

Tight buffered optical multi fiber cable is used mostly in what installation?

Answer 5

For Indoor cable

Question 6

2.1.1 Fish tapes and poles

A fish tape should never be used near?

Answer 6

To prevent electrical shock, fish tapes should not be used in or near live circuits.

Question 7

2.1.2 power conduit fishing systems

The name of the item that is vacuumed through a run using a fish unit is called a ?

Answer 7

(Also called a mouse) or piston

Question 8

2.2.2 determining the pulling location

Two way communication devices are essential?

Answer 8

Including walkie -talkies and cell phones are essential to every cable pull.

Question 9

2.3.2 preparing conduit pathways

How do you test for hidden obstructions in the conduit?

Answer 9

A test pull will detect any hidden obstructions in the conduit before the pull.

Question 10

2.3.3 installing a pull line in conduit

Any rope used for pulling cable through conduit should?

Answer 10

Any rope used must be designed so that it does not stretch much under tension.

Question 11

2.3.5 prepaying cable ends

A Clevis is usually part of the pulling line rope; allows the rope to twist and prevent tangling?

Answer 11

When using pulling grips or stockings, a clevis that is part of the stocking is normally used to help connect the pulling rope to the wire grip.

Question 12

2.3.5 preparing cable ends

A general rule the maximum amount of pulling tension for UTP cable is?

Answer 12

Not exceed 25 foot pounds per cable

Question 13

3.1.2 residential unit communication/ data cable requirements and grades

ANSI/TIA-570 provides recommendation for the minimum number of 1 communication outlet in residential unit spaces?

Answer 13

Bedroom
Family / great room
Study/ den
Kitchen

Question 14

3.1.3 residential cable installation requirements/ considerations

For coaxial cable under a load the minimum bend radius is 20 times the outside diameter of the cable.

Answer 14

Under tensile load, or 10 times the diameter, or unloaded unless the manufacturer recommends other wis.

Question 15

4.1.7 communication circuits with building

All communication cables can be used in cable trays except for CMX.

Answer 15

Communication circuits conductors or cables must not strapped, tapped, or attached by any means to the exterior of any conduit or other race way.