British Rail Class 314 alternating current (AC) electric multiple units (EMU) were built by BREL at York works from 1978 to 1979. They were the second variety of British Rail's then-standard 1972 design for suburban EMUs, which eventually encompassed 755 vehicles and five Classes (Class 313/314/315/507/508). Able to operate from 25 kV overhead line current collection only, the fleet worked outer-suburban services on the Strathclyde Passenger Transport rail network in Central Scotland.
Quick facts In service, Manufacturer ...
| British Rail Class 314 |
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 |
 Interior of a ScotRail refurbished Class 314 unit in August 2018 |
| In service | 1979–2019 |
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| Manufacturer | British Rail Engineering Limited |
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| Built at | Holgate Road Works, York |
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| Family name | BREL 1972 |
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| Constructed | 1979 |
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| Entered service | 1979 |
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| Refurbished | - 2006–2007
- 2009–2010
- 2011–2013
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| Scrapped | 2019–2020 |
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| Number built | 16 |
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| Number preserved | 1 (Converted into Class 614) |
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| Number scrapped | 15 |
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| Successor | |
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| Formation | 3 cars per unit:
DMSO-PTSO-DMSO |
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| Diagram | - DMSO vehicles: EA206
- PTSO vehicles: EH211
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| Fleet numbers | 314201–314216 |
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| Capacity | 212 seats |
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| Operators | |
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| Depots | - Glasgow Shields Road
- Glasgow Hyndland
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| Lines served | - Argyle Line
- North Clyde Line
- Cathcart Circle Lines
- Inverclyde Line
- Paisley Canal Line
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| Car body construction | Steel underframe with aluminium body and roof |
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| Car length | - DM vehs.: 19.800 m (64 ft 11.5 in)
- Trailers: 19.920 m (65 ft 4.3 in)
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| Width | 2.820 m (9 ft 3.0 in) |
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| Height | 3.582 m (11 ft 9.0 in) |
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| Floor height | 1.146 m (3 ft 9.1 in) |
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| Doors | Double-leaf pocket sliding, each 1.288 m (4 ft 2.7 in) wide (2 per side per car) |
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| Wheelbase | Over bogie centres:
14.170 m (46 ft 5.9 in) |
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| Maximum speed | 70 mph (113 km/h) |
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| Weight | - DMSO: 34.6 t (34.1 long tons)
- PTSO: 33.0 t (32.5 long tons)
- Total: 102.2 t (100.6 long tons)
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| Traction motors | - 8 total; 4 per DMSO vehicle
- (GEC G310AZ or Brush TM61-53, interchangeably)
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| Power output | 660 kW (880 hp) |
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| Electric system(s) | 25 kV 50 Hz AC overhead |
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| Current collector(s) | Pantograph |
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| UIC classification | Bo′Bo′+2′2′+Bo′Bo′ |
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| Bogies | BREL BX1 |
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| Minimum turning radius | 70.4 m (231 ft 0 in) |
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| Braking system(s) | Electro-pneumatic (disc) |
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| Safety system(s) | |
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| Coupling system | Tightlock |
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| Multiple working | Within class |
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| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) standard gauge |
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| Specifications as at August 1982[1] except where otherwise noted. |
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