If a comb rated at 4750 W, 208 V 3 phase draws how many amps?

Prepare for the Michigan Journeyman Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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

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