CAT CAT Electrical and Wiring Fundamentals

Question 1

What wire gauge is most commonly used for low-voltage alarm system wiring?

Accepted Answer

22 AWG

Answer

10 AWG

Answer

14 AWG

Answer

6 AWG

Question 2

What is the purpose of an end-of-line (EOL) resistor in a security alarm circuit?

Accepted Answer

Supervise the circuit so the panel can detect a cut or shorted wire

Answer

Increase voltage on the detection loop

Answer

Reduce current draw from the panel

Answer

Protect the panel from power surges

Question 3

Which type of wiring configuration is required by NFPA 72 for Class A fire alarm circuits?

Accepted Answer

Loop/return path so the circuit survives a single open fault

Answer

Star topology from a central hub

Answer

Daisy chain with no return

Answer

Home run to each device

Question 4

What does a supervised circuit in a security alarm system detect?

Accepted Answer

Wire cuts and short circuits

Answer

Only motion sensor activity

Answer

Power grid fluctuations

Answer

Battery voltage levels

Question 5

Why is shielded cable recommended for alarm keypad wiring?

Accepted Answer

To reduce electromagnetic interference that could cause false signals

Answer

To increase the wire's current capacity

Answer

To comply with NEC Article 225

Answer

To improve physical strength of the wire run

Question 6

How far must alarm low-voltage wiring be separated from high-voltage (120V+) electrical wiring when run in parallel?

Accepted Answer

At least 2 inches

Answer

At least 12 inches

Answer

They may touch if both are in conduit

Answer

No separation is required