Fencalc XA2021
Fitting efficiency
Efficient fittings reduce electrical demand, but must still satisfy user needs and safety.
How to use the diagram
Read the visual first, then connect each label to the lesson text and your calculator inputs. The aim is to make every assumption visible before you calculate.
Learning Objective
Connect fitting choice and controls to energy efficiency.
Controls
Switching, zoning and sensors can reduce unnecessary operation.
Practice Task
- Suggest a control strategy for one office area.
- Identify over-lit spaces.
Calculator Tip
Record controls in the compliance notes, not only fitting wattage.
Worked Example: Lighting Schedule Review
Scenario
An office area has LED downlights, perimeter switching and no occupancy sensors.
Calculator Entry
Keep room names consistent with floor-area and services notes.
Step-by-step method
- 1Create a room-by-room fitting schedule.
- 2Record fitting type, wattage and quantity.
- 3Note switching zones and controls.
- 4Flag substitutions for compliance review.
Expected conclusion
Efficient fittings help, but controls and substitutions still need documentation.
Common Mistakes
- Recording fitting wattage without a room-by-room lighting schedule.
- Ignoring controls, zoning and occupancy patterns.
- Allowing substitutions without checking the compliance effect.
Quick Knowledge Check
1. What should you confirm before applying this lesson to a project?
Lighting levels remain suitable.
2. Which piece of evidence should support the main input in this lesson?
Suggest a control strategy for one office area.
3. What is the safest action if the information is incomplete?
Flag the missing evidence, use a conservative assumption where appropriate, and avoid claiming compliance until the information is confirmed.