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In relation to household electricity supply describe each of the following: - ring circuit - miniature circuit breakers (MCB's) - Leaving Cert Home Economics - Question 1(c) - 2008
Question 1(c)
In relation to household electricity supply describe each of the following: - ring circuit - miniature circuit breakers (MCB's). Identify three potential inefficie... show full transcript
Worked Solution & Example Answer:In relation to household electricity supply describe each of the following: - ring circuit - miniature circuit breakers (MCB's) - Leaving Cert Home Economics - Question 1(c) - 2008
Step 1
ring circuit
Answer
A ring circuit is a type of electrical installation that consists of a wire leading from the consumer unit around the house and returning to it. This configuration allows for a more efficient use of wiring, as the ring loop can supply power to sockets or lights both upstairs and downstairs without requiring additional wiring. Each outlet within the ring can carry an individual load, typically up to 13A, enhancing flexibility. Additionally, it includes an earth wire for safety.
Step 2
miniature circuit breakers (MCB's)
Answer
Miniature circuit breakers (MCBs) are essential devices that provide safety by cutting off the electrical supply when a fault occurs or when the circuit is overloaded. They function as switches that automatically trip to disconnect the circuit, preventing potential electrical hazards. MCBs are often used in conjunction with RCDs (Residual Current Devices), which provide additional protection against electric shocks by disconnecting the circuit when a leakage current is detected.
Step 3
Identify three potential inefficient uses of electricity in the home and outline the improvement strategy you would recommend in each case.
Answer
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Unnecessary use of lights: Many households leave lights on in unused rooms or areas. Improvement Strategy: Use of motion-sensitive switches or energy-efficient LED bulbs that can be controlled via smart systems to reduce power consumption.
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Appliances left on standby: Devices like televisions, microwaves, and computers often consume energy even when not in use. Improvement Strategy: Recommendation to use power strips with an on/off switch to easily cut power to multiple devices when not in use.
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Heating systems without thermostats/timers: Conventional heating systems can lead to energy wastage if left running without regulation. Improvement Strategy: Upgrade to a heating system with programmable thermostats to adjust the heating schedule according to actual usage patterns, ensuring heat is only provided when needed.