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3 cards from this section. Quick, good the night before a test.
What color is the live wire in a domestic circuit?
Think about common wiring color codes.
What is the function of the earth wire?
Consider safety measures in electrical systems.
What is the potential difference between the live and neutral wire in a typical domestic circuit?
Consider standard voltage levels for household wiring.
True or False: The earth wire is used for carrying current to appliances.
Think about the purpose of the earth wire.
A household circuit is designed to support four appliances with ratings 2 kW, 1.5 kW, 1 kW, and 600W. If all appliances operate simultaneously, what would be the total current drawn from a 220V circuit? Would this overload a typical 15A circuit?
Calculate the current by converting all power ratings to a common unit.
Explain the modification needed in a domestic circuit if a new 3kW water heater is to be installed. What are the implications for fusing?
Consider the power demands and safety features that need adjustments.
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