| Type: | Public company |
| Industry: | Electricity supply |
| Founded: | 1900 |
| Defunct: | 31 March 1948 |
| Fate: | Nationalisation |
| Successor: | British Electricity Authority, Eastern Electricity Board |
| Area Served: | North London, parts of Essex and Hertfordshire |
| Products: | Electricity |
The North Metropolitan Electric Power Supply Company provided electricity to the northern suburbs of London and to parts of Hertfordshire and Essex. Supplies of electricity commenced in 1907 and continued until the company was abolished in 1948 when the British electricity supply industry was nationalized.
| Short Title: | North Metropolitan Electric Power Supply Act 1900 |
| Type: | Act |
| Parliament: | Parliament of the United Kingdom |
| Year: | 1900 |
| Citation: | 63 & 64 Vict. c. cclxxvi |
| Royal Assent: | 6 August 1900 |
| Repealing Legislation: | North Metropolitan Electric Power Supply (Consolidation) Act 1928 |
| Status: | repealed |
| Collapsed: | yes |
The North Metropolitan Electric Power Supply Company (Northmet) was established in 1900 under the provisions of the North Metropolitan Electric Power Supply Act 1900 (63 & 64 Vict. c. cclxxvi).[1] The act empowered the company to construct a power station at Enfield (Brimsdown) and to supply electricity to the boroughs and towns of: Hendon, Barnet, Edmonton, Ware, Hertford, Hatfield, Welwyn, St. Albans, Chingford and Walthamstow. This encompassed an area of 325 square miles. Further Acts of 1902, 1903, 1905, 1907 and 1909 extended the area of supply and permitted the company to purchase the power station at Willesden (Taylors Lane). Electric current was first supplied to Edmonton on 1 July 1907.
The directors of the company in 1923 were:[2]
The North Metropolitan Power Station Company Limited owned Brimsdown power station which was operated under lease by the Northmet Power Company.
The North Metropolitan Electrical Power Distribution Company was registered on 19 April 1899. It was formed to supply electricity, which it took from a bulk supply from the North Metropolitan Electric Power Supply Company. Electricity was supplied to Hertford, Barnet, Enfield and St. Albans. The distribution company was vested into the Northmet Electric Power Company in December 1922.[3]
Before the First World War Northmet was supplying tramway systems, the underground railway as well as several boroughs and towns.[4]
The electricity sold, and the revenue, over the period 1908-12 was as follows.
| 1908 | 74,304 | 43,150 | 14,069 | |
| 1909 | 87,833 | 44,491 | 16,402 | |
| 1910 | 111,309 | 50,185 | 21,422 | |
| 1911 | 131,131 | 60,590 | 26,454 | |
| 1912 | 140,522 | 71,292 | 29,231 |
By 1915 Northmet was operating power stations at Brimsdown, Willesden (Taylors Lane), Hertford and St. Albans. Outline details of these stations is summarised in the table, for full details see articles for individual power stations (See also below).
| Willesden | Hertford | St. Albans | |||
| Steam lb/hr | 130,000 | 98,250 | 3 boilers | ||
|---|---|---|---|---|---|
| Generators | 3 × 1 MW 1 × 2 MW 1 × 3 MW 2 × 100 kW 2 × 50 kW | 2 × 300 kW 1 × 600 kW 1 × 750 kW 1 × 1 MW 2 × 1.2 MW 1 × 3 MW | 3 × 100 kW 1 × 500 kW 1 × 200 kW | 4 × 48 kW 4 × 48 kW 2 × 36 kW | |
| Supply | 10,500 V 3-phase, 50 Hz | 10,500 V 3-phase, 50 Hz 2,750-2,950 V 3-phase 50 Hz | LT and HT | ||
| Cooling | Spray cooling and 5 chimney cooling towers | Klein cooling towers |
The specification of the Northmet generating plant in 1923 is outlined below.
| Steam lb/hr | 290,000 | 248,000 | 24,000 | 18,000 | |
|---|---|---|---|---|---|
| Generators | 1 × 3 MW 2 × 5 MW (Total 13 MW AC) | 3 × 1.5 MW 1 × 3 MW 2 × 6 MW 1 × 0.75 MW DC (Total 19.5 MW AC, 0.75 MW DC) | 1 × 0.5 MW 1 × 1.0 MW 1 × 0.1 MW DC (Total 1.5 MW AC, 0.1 MW DC) | 2 × 75 kW DC 2 × 150 kW DC 2 × 240 kW DC 1 × 500 kW DC (Total 1.43MW DC) | |
| Supply | 3-phase, 50 Hz, 11 & 6.6 kV, 415 & 240 V and DC 460 & 230 V DC | 3-phase, 50 Hz, 415 & 240 V AC and 460 & 230V DC | 3-phase, 50 Hz 415 & 240 V AC and 460 & 230V DC | ||
| Maximum load kW | 26,500 | 630 | 1,322 | ||
| Total electricity sold MWh | 62,315 | 838 | 1,982 | ||
| Steam lb/hr | 160,000 | 120,000 | 414,000 | |
|---|---|---|---|---|
| Generators total | 34 MW | 107.5 MW | 38.5 MW | |
| Maximum load kW | 235,980 | |||
| Total electricity sold MWh | 636,585 | |||
Northmet electricity output in the post-war period was as follows.
| 1946 | 96,643 | 490,564 | 223,694 | |
| 1947 | 123,754 | 463,339 | 185,573 | |
| 1948 | 172,286 | 427,661 | 282,544 | |
| 1950 | 157,207 | 488,663 | 201,650 |
The North Metropolitan Electric Power Supply Company was abolished on 31 March 1948 under the provisions of the Electricity Act 1947 which nationalized the British electricity supply industry. The generating plant was vested in the British Electricity Authority and the distribution infrastructure in the Eastern Electricity Board.
Generation of electricity at Willesden (Taylors Lane) and Brimsdown power stations continued until 1972 and 1976 respectively.[7]