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Electrical Engineer

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AVG. SALARY

$102,880

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EDUCATION

Bachelor's degree

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JOB OUTLOOK

Stable

Real-Life Activities

Real-Life Math -- Solution

To choose the current amp you must solve the equation for current.

Power = [square root of 3] x voltage x current

Power = 1 million volt-amp
Voltage = 25,000 volts

1,000,000 volt-amp = [square root of 3] x (25,000 volts) x current
Current = 1,000,000 volt-amp / ([square root of 3] x 25,000)
Current = 23 amps

You choose to use the 23-amp fuse. If you choose a fuse with a higher amp, you could endanger the safety of the mall.

Much of the math is more involved than a power calculation, says Clouston. "But it's still basic multiplication and division -- just with different parameters."


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