Under the supervision of the Meter Test Station Depertment of NEMSA, the National Meter Test Station, located in Oshodi (Lagos state), Kaduna and Port Harcourt, perform the function of meter testing calibration and type test to verify and confirm their efficacy and prove that they comply with the requirement of relevant standards and accuracy.

The MTS are well equipped and manned by experts and skilled technical personnel to carry out the function of testing, calibration and certification of other instrument used along the NESI value chain.

As part of its mandatory functions, NEMSA, through the core unit of it national Meter Test Stations enforces the Grid metering code (GMD) and the Distribution Metering Code (DMC) by the policy regulator in the NESI, the Nigerian Electricity Regulatory Commission (NERC) and in line with the International Electrotechnical Commission (IEC) standards.