Before selecting a specific circuit configuration, you must choose between a centralized or distributed layout.
• Centralized Layout: Each load is connected directly to the power source (Main LV Switchboard). This is typically used when loads are localized (high unit power) and no flexibility is required,.
• Distributed (Decentralized) Layout: Loads are connected to sources via a busway (busbar trunking system). This allows power to be supplied to many spread-out loads and offers high flexibility for future changes or new connections
Radial Distribution
Advantages
It is simplest method of the power distribution
It is also the cheapest method available
Disadvantages
Poor reliability
High voltage drop at the tail end of the feeder
Advantages
- Most reliable for continuity of the supply
Gives better voltage regulation
Disadvantages
Expensive. Requires high investment
| Topology | Best Suited For | Redundancy |
| Single Feeder | Any site topology; localized loads; minimal maintainability required. | None |
| Parallel / Coupled | Any site topology; high sensitivity to disturbances. | Partial or Total |
| Interconnected Busway | Large single-level sites (5,000–25,000 m²); high power demand (≥ 2500 kVA). | Partial or Total |
| LV Ring | Large single-level sites; high power demand (> 2500 kVA); standard maintainability. | High |
| Double-Ended | Any site topology; localized loads; enhanced maintainability required. | Very High |
Electrical Engineer 