An Electricity meter or energy meter is a device that measures the amount of electricity/energy consumed by a residence, business, industry or any other energy consuming appliance connected to it. Electricity meters are typically calibrated in billing units, the most common is the kilowatt-hour(kwh), which is equal to the amount of energy used by a load of one kilowatt over a period of one hour. Periodic reading of electric meters establishes billing cycles and energy used during a cycle. Electrical energy is thus measured at various points in the energy chain so as to quantify it and convert to revenue appropriately with maximum attainable accuracy. Each Constituent operational part of the electricity supply organization needs to asses/quantify the energy passing through its domain. Thus the generating station is expected to measure or meter the quantity of energy generated into the grid, transmission stations should take record of energy received from the power stations and delivered to distribution sector which should account accurately for the energy received and distributed to customers. The reforms in the power sector in Nigeria does not allow for avoidable losses since the essence of re-engineering the former PHCN is to achieve greater operational efficiency and better productivity.