Prioritize safe conservation choices
See this course’s project requirements
A desk-based household energy comparison with checked kWh estimates, usage assumptions and a safe no-installation conservation recommendation.
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What to include
- Calculate power-time energy with explicit units.
- Complete a quantity-aware 30-day device table.
- Separate ratings, measurements and standardized estimates.
- Compare matched lighting output and calculate differences.
- Recommend an existing-control action preserving essential services.
- Recalculate the final comparison and retain evidence limits.
Review and revise
Use these criteria to check your work and choose what to improve.
- Method: applies the course-specific rules to the supplied cases with visible intermediate work.
- Accuracy: results agree with the stated facts, units, boundaries and independent checks.
- Reasoning: explains why the result follows and identifies a limitation or unresolved question.
- Transfer: completes changed cases and revises the final project when a relevant assumption changes.
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The idea in everyday life
Fictional household facts: a 60 W desk lamp remains on for 2 unnecessary h/day; a 300 W medical device is essential and must stay as directed; a sealed appliance has unknown wiring; no money or replacement purchase is part of the task. Compare desk-lamp runtime reduction, medical-device disconnection and internal appliance modification.
A conservation recommendation should preserve essential services and use actions within the person’s responsibility. Turning off an unused ordinary light can reduce runtime without equipment modification. Do not unplug essential medical devices, disable alarms, change equipment wiring, open appliances or compromise necessary temperature conditions to chase a number.
Prioritize safe conservation choices — worked practice
A conservation recommendation should preserve essential services and use actions within the person’s responsibility. Turning off an unused ordinary light can reduce runtime without equipment modification. Do not unplug essential medical devices, disable alarms, change equipment wiring, open appliances or compromise necessary temperature conditions to chase a number.
Fictional household facts: a 60 W desk lamp remains on for 2 unnecessary h/day; a 300 W medical device is essential and must stay as directed; a sealed appliance has unknown wiring; no money or replacement purchase is part of the task. Compare desk-lamp runtime reduction, medical-device disconnection and internal appliance modification.
1. 1. Screen
Identify actions outside the safe scope.
You should see: Do not disconnect the essential device or open/modify the sealed appliance.
2. 2. Calculate
Estimate avoidable lamp energy for 30 days.
You should see: 0.06×2×30=3.6 kWh.
3. 3. Recommend
Choose a feasible action using existing controls.
You should see: Switch the ordinary desk lamp off when no longer needed, respecting other users’ needs.
4. 4. Limit
State what the recommendation does not prove.
You should see: It estimates listed avoidable energy, not guaranteed whole-home savings or inspected electrical safety.
What to finish
A safe lamp-runtime recommendation with an avoidable-energy estimate and rejected actions.
Watch for this
An energy number does not authorize loss of needed service, unsafe modification or interference with another person’s essential equipment.
How can I tell I understand it?
Revise an avoidable-use estimate while maintaining the safe action boundary.
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Source & access notes · checked 2026-10-01
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