An Electrician Discovers That a Two-Wire Cable Has Been Run

question 13

True/False

An electrician discovers that a two-wire cable has been run instead of a three-wire cable. To remedy the problem, the electrician runs a single insulated conductor along with the two-wire cable. This method is acceptable according to the NEC.

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Definitions:

σ

The symbol for standard deviation, a measure of the amount of variation or dispersion of a set of values.

Normal Distribution

A symmetric probability distribution centered on the mean, demonstrating that occurrences near the mean happen more often than those far from it.

Maximum Oxygen Uptake

The maximum rate at which an individual can consume oxygen during intense or maximal exercise, indicating cardiorespiratory fitness.

Alternative Hypothesis

A statement in hypothesis testing that proposes a difference or effect, opposing the null hypothesis which suggests no effect or difference.