What Do You Know About Wire And Cables?
Wire is a single, usually cylindrical, flexible strand or rod of metal – used to bear mechanical loads of electricity and telecommunication signals. Cable is commonly known as several wires laid into a helix. What do you know about the two?
- 1.When using electrical metal tubing, the maximum distance between pull points (boxes) is
- A.
100 feet
- B.
50 feet
- C.
The length of your snake.
- D.
Undefined. There is no maximum distance specified in the code.
- 2.Non-listed wire may be used anywhere other than a plenum.
- A.
True
- B.
False
- 3.Cables controlled by or containing wires or fiber-optic strands of private signaling organizations
- A.
Never be used on a fire alarm system.
- B.
Shall be permitted to be used for fire alarm purposes only by permission of the authority having jurisdiction.
- C.
Shall not be permitted to be used for fire alarm purposes unless approved by an electrical engineer qualified to test such cables.
- D.
Must be terminated by a certified cable technician certified by ANSI.
- 4.Wires must be protected from physical damage anytime they are
- A.
Within 10 feet of the floor.
- B.
Within 10 feet of the ceiling.
- C.
Within 7 feet of the floor.
- D.
Exposed.
- 5.When used in aerial construction, fire alarm wires and cables shall be located
- A.
Below all other wires.
- B.
Above all other wires.
- C.
In between cables used for telecommunication and power cables.
- D.
Under all other wires except communications wires.
- 6.The most common type of tubing used in the security industry for raceways is
- A.
FMC
- B.
HDPE
- C.
EMT
- D.
RNC
- 7.Which of the following is not a test used when approving Class 2 low-voltage transformers?
- A.
Circuit Secondary Voltage Test
- B.
Testing for compliance with CP-01 standards when packaged as a complete assembly
- C.
Output Current and Power Test
- D.
Rated Output Heating Test
- 8.Cables or raceways that run parallel to framing members or furring strips must be protected where they are likely to be penetrated by nails or screws by installing the wiring method so it isn’t less than ______ from the nearest edge of the framing member or furring strips.
- A.
3/4 inch
- B.
1/2 inch
- C.
1 1/4 inch
- D.
1 inch
- 9.Electrical metallic tubing must be securely fastened within _____ of every box, cabinet, or termination fitting, and at intervals not exceeding ______.
- A.
12 inches / 5 feet
- B.
3 feet / 10 feet
- C.
18 inches / 10 feet
- D.
6 inches / 10 feet
- 10.If the edge of the framing member or furring strip is less than 1¼ inch away, a _____-thick steel plate of sufficient length and width must be installed to protect the wiring method from screws and nails.
- A.
1/8 inch
- B.
1/16 inch
- C.
1/4 inch
- D.
1/2 inch
- 11.A box must be installed at each splice of termination point, except for
- A.
Communications, signal, and control conductors.
- B.
Line voltage connections.
- C.
Class 1 connections.
- D.
None. A box is always required for a splice.
- 12.Which of the following wiring methods are permitted to be used in a ceiling area designated for environmental air?
- A.
EMT
- B.
Flexible metal conduit
- C.
Rigid metal conduit
- D.
Any of the above
- E.
None of the above
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