Electrical Installation

2.1. cables and wiring

              Types of Wiring Systems
1. Cleat Wiring – Uses porcelain cleats to support cables; temporary and inexpensive.
2. Casing & Capping Wiring – Cables run inside wooden casing; offers protection.
3. Batten Wiring – Uses TRS or PVC-sheathed cables fixed on wooden battens.
4. Conduit Wiring – Cables run inside metal or PVC conduits; highly durable.

          Factors Affecting Cable Selection
- Initial Cost– Must be economical for the consumer.
- Durability – Should withstand environmental conditions.
- Mechanical Protection – Must prevent damage to cables.
- Safety from Fire – Should minimize fire risks.
- Accessibility – Easy to extend or repair.
- Life Expectancy – Should last long without frequent replacements.

                 Common Cable Types
- PVC-Insulated Cables – Flexible and widely used.
- Armored Cables – Provide extra protection for underground installations.
- Twin & Earth Cables – Common in domestic wiring.
- Coaxial Cables – Used for signal transmission.