Definition of ring main in English:

ring main

Line breaks: ring main

noun

British
1An electrical supply serving a series of consumers and returning to the original source, so that each consumer has an alternative path in the event of a failure.
More example sentences
  • He said the new machine would bring significant advantages to people living close to the ring main which circles the city.
  • Consumers will benefit from the new gas ring main linking Galway and Limerick to the grid while the Government has decided to extend the gas network to the north west.
  • Contractors are working round the ring mains, which vaguely follows the Bradford Ring Road, in an anti-clockwise direction.
1.1 another term for ring circuit.
More example sentences
  • My father and I spent the best part of one day fitting outside taps for the garden and working under the floorboards fitting additional sockets into the ring main.
2An arrangement of pipes forming a closed loop into which steam, water, or sewage may be fed and whose points of draw-off are supplied by flow from two directions.
More example sentences
  • The Trust installed a ring main and new water tanks at a cost of £100,000.
  • Work on the Channel Tunnel itself, on the ring main for London's water, and on the Jubilee Line extension, happened out of sight.
  • The average cost of the road is expected to be in the region of £750,000 per km of the 3.9km road, with an additional £800,000 for a new river crossing and £350,000 foul water ring main (drainage).

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