In the NEC, the location of unit resistances for copper wire is found in which table?

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Study for the Fire Alarm Lesson 5and6 Test. Prepare with flashcards and multiple choice questions; each question comes with hints and explanations. Gear up for success on your exam!

Multiple Choice

In the NEC, the location of unit resistances for copper wire is found in which table?

Explanation:
Unit resistances for copper conductors are the ohmic values you use to convert conductor size into a resistance per length for quick calculations (like voltage drop and heating). The NEC places these copper values in a single table that lists resistance per 1,000 feet for each wire size, making it the go-to reference when you need those numbers. That’s Table 8. Other tables in the code cover different data (such as ampacities or other material properties) and don’t provide the copper unit resistances, so Table 8 is the exact source for this information.

Unit resistances for copper conductors are the ohmic values you use to convert conductor size into a resistance per length for quick calculations (like voltage drop and heating). The NEC places these copper values in a single table that lists resistance per 1,000 feet for each wire size, making it the go-to reference when you need those numbers. That’s Table 8. Other tables in the code cover different data (such as ampacities or other material properties) and don’t provide the copper unit resistances, so Table 8 is the exact source for this information.

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