Electrical Power Calculations LCSD

Stove @ 240 VAC
What is the amperage?

• 16.67 Amps
• 23.45 Amps
• 43.33 Amps
• 34.43 Amps

If the hair dryer and the vacuum cleaner are both on, what is the power used?

• 2600 watts
• 400 watts
• 2200 watts
• 1100 watts

 A 120 Vac - 20 A  circuit breaker max power rating

• 240 watts
• 24 watts
• 2400 watts
• 240 volts

NEC states that a circuit breaker load should not exceed ___ % of it full rating.

• 125
• 80
• 60
• 40

What is 80% of 2400 watts?

• 1920 watts
• 19,200 watts
• 2000 watts
• 20,000 watts

How many 60 watts light bulbs can you safely place a 120 Vac 20 Amp Circuit?(Hint 80%)

• 60
• 40
• 32
• 10

A hot water heater rated at 2600 watts is wired to 120 Vac circuit. What is the amperage?

• 21.67 Ohms
• 21.67 amps
• 11.8 amps
• 16 amps

A heating element resistance is 24 ohms. The current measures 10 Amps. What is the power?

• 240 watts
• 1,200 watts
• 1,000 watts
• 2,400 watts

A heater has an internal resistance of 16 ohms is placed on a 120 Vac circuit. What is the power? 

• 900 watts
• 1920 watts
• 7.5 watts
• 18 watts

Coffee Pot @ 1200 W

120 VAC What is the amperage?

• 10 Amps

• 12 Amps

• 10 Watts

• 12 Ohms