Electric power delivered to your home or business is typically generated in large centralized power plants of National Power Corporation (NPC) and independent power producers (IPPs). Power then travels over long distances via high-voltage transmission lines (138kV or 230kV) of National Transmission Corporation (TransCo), which are interconnected in a grid or network configuration.

From the transmission system, power travels by means of 69kV sub-transmission lines to 13 VECO distribution substations with a total capacity of 410MVA that are strategically located within its franchise area. From these substations, distribution lines operating at medium-voltage levels of 23kV, 13.8kV and 4.16kV, disperse the power throughout Cebu City and nearby municipalities. The power then travels from the distribution line through a service transformer located in close proximity to your home or business establishment. Electricity enters the customers' premises at low-voltage levels (220 or 440V) through overhead conductors (wires) which connect to the kilowatt-hour (KWH) meter. From the meter, or point of service, power flows along conductors to the main panel which contains the main breaker.

The main breaker's duty is to provide protection for the entire facility. And finally, branch circuits deliver power for lights, appliances, and electric outlets within the residences while industrial and commercial facilities have additional branch circuits for heating, ventilation and air-conditioning. Thus, the 285,825 VECO customers (June 2007) are assured of an efficient and stable voltage level for utilization. As of June 2007, VECO registered its highest demand of 312.55 Megawatts (MW).


See illustration diagram: