Kenya commissions the Isinya to Namanga line, and most of it was already carrying power.

For an industrial buyer on the corridor that runs south from Nairobi towards the Tanzanian border, the transmission capacity its site depends on is now formally complete rather than partly in service. Kenya's transmission company said on 3 September 2026 that the President of Kenya had commissioned the 132 kV project linking Machakos, Konza, Isinya and Namanga, and that the four substations stepping the line down to 33 kV along its route are fully operational.

Most of the line has been in commercial operation for well over a year. The corridor runs for 109 kilometres; a 15 kilometre section between Machakos and Konza was energised in October 2016, and the 94 kilometre stretch from Isinya to Namanga followed in February 2024.

The company says the line was built to give firm, continuous electricity to the Konza technology city and to standard gauge railway operations, and to connect the towns and the Namanga border post along its route to the high voltage grid. It describes the project as adding capacity for industry on the stretch between Kajiado and Namanga, naming cement and ceramic tile manufacturing among the users it expects to serve.

Construction was carried out with an Indian contractor, Shyama Power Limited, and supervised by Power Grid India alongside the transmission company's own engineers. Co-financing came from the Kenyan government and a line of credit from the Export-Import Bank of India, a facility of USD 61.60 million signed in December 2010, and the company puts the project's total cost at USD 9.47 million, well below that facility.

Namanga is the crossing point for trade between Kenya and Tanzania, and the company presents a stronger network up to that border as support for cross border activity.

For large power users, a commissioned line with operating substations changes what can reasonably be asked for: firm capacity at a named substation, and a credible path to wheel power to a site on the corridor. It is worth asking the transmission company what spare capacity the substation nearest your plant holds, and on what terms third party access to it is granted. If your supply agreement assumes a single utility offtake, the dates on which these sections were energised show how long an alternative has been physically available.