One of the mysteries of the English language finally explained.
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.
- ‘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.’
- ‘He said the new machine would bring significant advantages to people living close to the ring main which circles the city.’
- ‘Backbones and ring mains are laid around cities as other infrastructure is buried.’
- ‘Contractors are working round the ring mains, which vaguely follows the Bradford Ring Road, in an anti-clockwise direction.’
- 1.1another term for ring circuit
- ‘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.
- ‘Mr Thompson added: ‘We'll be working on the ring main, a large diameter pipe which runs around the outskirts of the city and feeds the smaller pipes taking water to customers homes.’’
- ‘The workers are cleaning Bradford's ring mains water pipes at the rate of about 1km per week.’
- ‘The Trust installed a ring main and new water tanks at a cost of £100,000.’
- ‘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).’
- ‘Work on the Channel Tunnel itself, on the ring main for London's water, and on the Jubilee Line extension, happened out of sight.’
- ‘Once outside the new ring main 35 to 40 percent of treated water is lost in leakage.’
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