What does 18/2 refer to in alarm wiring?

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Pass the California Alarm Company Operator Exam. Study with flashcards and multiple choice questions, each with hints and explanations. Prepare for your exam with confidence!

Multiple Choice

What does 18/2 refer to in alarm wiring?

Explanation:
In alarm wiring notation, 18/2 tells you two things: the size of the conductor and how many insulated conductors are inside the jacket. The first number, 18, is the gauge (18 AWG), meaning the wires are fairly thin. The second number, 2, means there are two insulated conductors inside the cable. So 18/2 is two-conductor cable with 18-gauge conductors. Ground conductors (if present) are typically not counted in that second number. That’s why the description fits best: a two-conductor 18 AWG cable. The other options would indicate different counts or thicker/thinner wire (for example, 18/3 would be three insulated conductors, 16/2 would use 16 AWG, and 18/4 would have four insulated conductors).

In alarm wiring notation, 18/2 tells you two things: the size of the conductor and how many insulated conductors are inside the jacket. The first number, 18, is the gauge (18 AWG), meaning the wires are fairly thin. The second number, 2, means there are two insulated conductors inside the cable. So 18/2 is two-conductor cable with 18-gauge conductors. Ground conductors (if present) are typically not counted in that second number. That’s why the description fits best: a two-conductor 18 AWG cable. The other options would indicate different counts or thicker/thinner wire (for example, 18/3 would be three insulated conductors, 16/2 would use 16 AWG, and 18/4 would have four insulated conductors).

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