Distribution line / distribution network
distribution grid · feeder
The distribution network carries electricity from substations to neighbourhoods, homes and factories; each circuit in it is a distribution line.
If the transmission grid is the motorway, the distribution network is the side streets. Korea's Electric Utility Act calls running the equipment that delivers power to end users the 'distribution business'.
Small solar plants usually connect to a distribution line, so the line, its substation and the transmission grid above all need spare room. Government figures put a new distribution line at one to two years; substations and high-voltage lines take much longer.