Michigan Journeyman Practice Test

To determine the current drawn by a 3-phase load, you can use the formula for calculating current (I) in a 3-phase system, which is:

\[ I = \frac{P}{\sqrt{3} \times V} \]

Where:

- \( P \) is the power in watts (W)

- \( V \) is the voltage in volts (V)

- \( \sqrt{3} \) is a constant that accounts for the three phases.

In this case, the comb is rated at 4750 W and operates at 208 V. Plugging these values into the formula gives:

\[ I = \frac{4750}{\sqrt{3} \times 208} \]

First, calculate \( \sqrt{3} \) which is approximately 1.732. Now, substitute this value into the equation:

\[ I = \frac{4750}{1.732 \times 208} \]

Calculating the denominator:

\[ 1.732 \times 208 \approx 360.256 \]

Now calculate the current:

\[ I = \frac{4750}{360.256} \approx 13.2 \, A \]

Therefore, the