BasicB-003-017-008
What are the nominal power-line voltages supplied to homes?
C
Answer
Basic radio theory
Type
A
100 volts and 200 volts
B
130 volts and 260 volts
C
120 volts and 240 volts
D
110 volts and 220 volts
Answer Notes
In North America, the modern standard nominal voltages supplied by electrical utilities to residential homes are 120 volts and 240 volts.
Standard wall outlets supply 120 volts for typical household appliances, while larger appliances like stoves and clothes dryers use 240-volt circuits.
It is easy to be distracted by options like 110 volts and 220 volts. While these values were standard many decades ago and are still heavily used in casual slang, they are technically incorrect for modern electrical utility standards on the exam.
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Your transceiver's user guide suggests limiting the voltage drop to 0.5 volts and the vehicle battery is 3 metres away. Given the losses listed below at the required current of 22 amperes, which minimum wire gauge must you use?