According to Section 310

question 21

Multiple Choice

According to Section 310.15(B) (7) in the NEC, the minimum conductor size for a 300-ampere residential service entrance is _________ Cu or _________ Al.

• A) 2 AWG; 1/0 AWG
• B) 2/0 AWG; 4/0 AWG
• C) 250 kcmil; 350 kcmil
• D) 400 kcmil; 600 kcmil

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Definitions:

Sum of Squares

A statistical measure that quantifies the total deviation of each data point from the mean, squared and summed up.

Regression Analysis

A statistical technique for estimating the relationships among variables, often used to predict the value of a dependent variable based on the value of one or more independent variables.

Error Variable

An error variable represents the difference between observed and predicted values in a model, reflecting the amount of inaccuracy in predictions.

Standard Deviation

The square root of the variance, indicating how data points in a set differ from the mean value.