Switching for the maintenance of the primary feeder can be done without consumer interruption. Spot networks are generally used in metropolitan or high load density areas for large continuous process industries and essential services load such as water works etc. A spot network, because of its multiplicity of feeders and transformers, is highly reliable. Momentary and long duration outages are almost non-existent. Spot network is used for serving large individual loads requiring a high degree of reliability. High-rise commercial buildings, shopping mals,
hospitals airports, etc. are frequently supplied by spot networks