Thursday, February 25, 2010

Design of Electrical Installations

Lighting/ Illumination:
Types of light fixtures-
1. Incandescent lamps
2. Fluorescent lamps
3. Compact fluorescent lamps
4. Halogen lamps
5. High pressure mercury vapour lamps
6. Metal Halide lamps
6. Low pressure Sodium vapour lamps
7. Neon indicator lamps














-Illumination level unit - Lux, Recommended lighting levels
-Color temperature - Warm white, cool white, daylight white
-Color rendering
-Ambient lighting & task lighting
-Illumination Simulation tools, e.g. Dialux


















Power outlets/sockets:
Ratings - 5A, 13A, 15A













Terminals: L, N, E

Routing of power conductors:
1. Cable trench

















2. Cable tray
3. Cable ladder












4. Cable duct
5. Cable trunking













Airconditioning & Ventilation:
1. Exhaust fans
2. Split type AC (Indoor & outdoor unit)
3. Package type AC
4. ACCU
5. PACU
6. AHU

Lightning protection and Earthing:
1. Earth rods
2. Earthing tape
3. Down conductors
4. No of Earthing points
















Telecommunication: 
 1. Internet
2. Telephone











3. IP TV
4. PABX
5. Satellite TV

Fire protection:
Types of Fire-
1. Paper/cloth/wood etc
2. Flammable liquids
3. Flammable gases
4. Electrical faults

Types of Extinguishers:
1. Water
2. Foam
3. CO2
















4. Dry chemical powder
5. Wet chemical powder
6. Sand buckets

Fire detection:
1. Heat detectors
2. Smoke detectors - Infrared
3. Smoke detectors - Photoelectric









4. Duct detectors
5. Manual call points
6. Emergency fire exit and gathering (meeting) points

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