Lighting System Design and Distribution

 

5. LIGHTING SYSTEM DESIGN

Lighting system design steps :

 

1. Project analysis:

- Read project lighting specification

- project plot plan analysis

- Model viewing

2. Lamp selection

3. Luminaire selection

4. Determination of number of fixtures by lighting software

5. Implementation of the number & types of luminaires in a layout

6. Applying lighting distribution criteria to determine the no. of circuits & the feeding cable size

7. Add the distribution information in the layout

In this section we will discuss steps no. 4 & 5 in details while steps no. 6 & 7 will be discussed in the next section

4. Determination of number of fixtures by lighting software :

In our calculations we will use the ( chalmlite software) 

CHALMLITE SOFTWARE

Working Environment

CHALMLITE SOFTWARE

Indoor Calculation

Outdoor Calculation

Luminaire Selection

Flood Light Method

Grid Definition

Results Presentation

Calculation Report

5. Implementation of the number & types of luminaires in a layout :

In this step the calculated luminaires number & types in the previous step will be presented in the layout .

Contents of the lighting layout:

1. Reference drawings

2. Notes

3. Legend

4. Fixture identification number

5. Panel identification number

6. Scale bar

7. Selected area plot plan

8. Fixtures & sockets distribution

9. lighting details if needed

LIGHTING LAYOUT 

 

6. LIGHTING CIRCUITS DISTRIBUTION CRITERIA

IMPORTANT INFORMATION :

1. Normal lighting circuits should be separated from Emergency lighting circuits.
2. Normal lighting circuits & Emergency lighting circuits may be fed from 1ph or 3ph circuits.
3. Street lighting, Flood lighting & high mast lighting should be fed form 3ph circuits.
4. Normally, lighting circuits breaker rating is 20A for 1ph & 3ph ct.
5. Don’t load the breaker with more than 80% of its rating.
6. Don’t use the max loading capacity of the breaker.
7. Follow the required distribution philosophy in the specification.
8. For sockets, no more than 6 socket per circuit .

LIGHTING CIRCUITS DISTRIBUTION STEPS :

1. Count all types of lighting fixtures (Normal, Emergency & flood)
2. Determine the max no. of fixture per circuit
3. Keep a spare in the loading capacity of the breaker
4. Apply the distribution philosophy for the selected area
5. Try to equalize the loads between the 3phases
6. Size the circuit cable based on the circuit length & the voltage drop
7. Size the conduit based on the calculated cable size
8. Implement your data on the layout to get what we call detailed lighting layout

Detailed Lighting layout

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Ahmad Mohammad

Hi. I’m Designer of Mawsoo3a Blog. I’m Electrical Engineer And Blogger Specializing In Electrical Engineering Topics. I’m Creative.I’m Working Now As Maintenance Head Section In An Industrial Company.

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