As homes expand or add extensions like garages, workshops, or additional units, a single main panel may not be enough to manage all the circuits. Sub-panel installation solves this by adding a secondary panel connected to the main one.
Why It Matters
A sub-panel allows you to add more circuits without overloading your main distribution board. Sub-panel installation is especially useful for home extensions, boreholes, workshops, or outdoor units that need their own dedicated power source.
What to Expect During the Process
- Assessment – The electrician evaluates your main panel's capacity and the power needs of the new area.
- Location Planning – A suitable location for the sub-panel is chosen, close to the area it will serve.
- Feeder Cable Installation – A cable is run from the main panel to the new sub-panel location.
- Sub-Panel Mounting – The sub-panel is mounted and wired with its own circuit breakers.
- Circuit Connection – New circuits for the extension or workshop are connected to the sub-panel.
- Testing – The whole setup, including the connection to the main panel, is tested for safety.
A good provider will clearly label the sub-panel and update the main panel's directory to reflect the new connection.
Common Mistakes to Avoid
Avoid undersized feeder cables that cannot handle the sub-panel's total load. Also, ensure the main panel has enough spare capacity before adding a sub-panel, or an upgrade may be needed first.
Estimated Cost of Sub-Panel Installation
| Service | Estimated Cost (KES) |
|---|---|
| Small sub-panel (up to 6 circuits) | 15,000 – 28,000 |
| Medium sub-panel (8–12 circuits) | 28,000 – 50,000 |
| Feeder cable installation (per meter) | 500 – 1,200 |
| Main panel capacity check | 3,000 – 6,000 |
| Testing and certification | 5,000 – 12,000 |
Prices vary based on distance from the main panel and the number of circuits needed.
Sub-panel installation is a practical solution for growing homes or properties with separate structures. It keeps your main panel from becoming overloaded and gives each area of your property reliable, dedicated power.