Nagsaag – San Jose – Marilao Line is a 500kV overhead line with a length of 8.7km from Nagsaag, Ilocos, Philippines, to Marilao, Central Luzon, Philippines.

The project, which is currently under construction, is expected to be commissioned in 2022.


Nagsaag – San Jose – Marilao Line is an overhead line that will be operated by National Grid Corporation of the Philippines. The line will carry alternating current (AC) through double circuit cable.

The development of the Nagsaag – San Jose – Marilao Line project has been approved by the Energy Regulatory Commission (ERC).

Nagsaag – San Jose – Marilao Line project development status

The construction works on the Nagsaag – San Jose – Marilao Line project will be commenced in 2021 and commissioning is expected in 2022.

About National Grid Corporation of the Philippines

National Grid Corporation of the Philippines (NGCP) is a power transmission corporation that conducts development, expansion, and operation and maintenance of transmission system and sub-transmission system that transmits electricity. The corporation builds, operates and maintains power grid to provide electricity transmission services. It also operates metering facilities, high-voltage transmission lines, towers, and substations. The corporation offers operation and maintenance, system operation, and planning and engineering services. It has partnership with other energy industry companies. NGCP is headquartered in Quezon City, Quezon, the Philippines.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.