Basic idea about lighting a building and load calculation.

1. Lightning & Load Estimation

3. Calculate the no of luminaries

4. Distribution of luminaries

5. Design no of socket outlets required

6. Load Estimation

7. Transformer selection

8. Draw a single line diagram

9. Cable selection

12. It is about total light emitted.

13. Luminous Intensity(I)

14. Measure the light intensity of a light source in a given direction

15. Illuminance

16. the luminous flux (lumens) falling on a surface per unit area normal to the surface.

17. Luminance

19. Required Illuminance (Lux level) Place to place change the required Lux level Depend on type of working situation So we can summarized the lux level

20. Recommended Lighting Levels

21. Number of lamps in each Luminaire

22. Lamp flux

24. So we have to consider that indirect contribution also.

25. The figure indicates the reflectance of the1.Ceiling 2. Walls 3. Floororking plane. 731 corresponds to a reflectance 0.7 for the ceiling, 0.3 for the walls and 0.1 for the working plane.

27. Cont….

29. Distribution of luminaries

31. It depend user requirement

32. Shop

33. House

34. Office

35. Factory

38. 50 kVA

39. 1000kVA

42. We have to check that cable is suitable.