university, physics
posted by Kenna .
A coffee maker is rated at 1200 W, a toaster at 1100 W, and a waffle maker at
1400 W. The three appliances are connected in parallel to a common 120V household circuit. (a) What is
the current in each appliance when operated independently? (b) What total current is delivered to the
appliances when all are operating simultaneously? (c) Is a 15A circuit breaker sufficient in this situation?
Explain.

current=power/120
a. do the math
b. add them
c. Hmmmm.
You ought to do engineering estimates first. 1200w is about 10 amp
1100 watts is about 10 amps
1400 watts is about 10 amps
That answers the last part pretty easily.
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