NEPCO operates the bulk power network in Jordan, which is composed principally of 400 and 132 kV circuits. The transmission system is structured on the north-south axis of Jordan. It is essentially a radial system with no looping except for a small ring around the main load center of Amman. There are approximately 3,200 circuit kilometers of transmission lines currently operated at 132 kV, which represents about 77% of the total network. Additionally, there are over 900 circuit kilometers of 400 kV transmission lines. NEPCO also operates the main substations to provide services to the various distribution networks, which have an aggregate capacity of about 10,303 MVA.