British Rail Class 308

British Rail Class 308
A Class 308 in West Yorkshire PTE livery at Keighley, 1996
In service	1959–2001
Manufacturer	British Railways
Order nos.	30652 (BDTCOL, 308/1); 30653 (MBSO, 308/1); 30654 (TCsoL, 308/1); 30655 (DTSO, 308/1); 30656 (BDTCOL, 308/1); 30657 (MBSO, 308/1); 30658 (TCsoL, 308/1); 30659 (DTSO, 308/1); 30694 (BDTSO, 308/3); 30695 (MBSO); 30696 (DTSO, 308/3); 30701 (MLV)
Built at	Holgate Road, York
Family name	1959 EMU
Replaced	Steam locomotives and carriages
Refurbished	1981–1983, 1994
Number built	45
Number preserved	1 (driving trailer only)
Number scrapped	44
Successor	Class 321, Class 323, Class 333
Formation	3 or 4 cars per train set: BDTS+MBS+TC+DTS (308/1); BDTCOL+MBSO+TSOL+DTSO (308/1, refurbished); BDTS+MLV+TC+DTS (308/2); BDTSOL+MLV+DTLV (308/2, refurbished); BDTS+MBS+DTS (308/3)
Diagram	ED207 (MBSO); ED216 (MBSO, 308/1); EE209 (DTSO, 308/3); EE220 (DTSO, 308/1); EF205 (BDTSO, 308/3); EF208 (BDTSOL, 308/1 as built); EF302 (BDTC); EF304 (BDTCOL, 308/1 refurbished); EH223 (TSOL, 308/1 refurbished); EH305 (TCsoL, 308/1 as built); EW501 (DTLV, 308/1); EY501 (MLV)
Design code	AM8
Fleet numbers	133-165 (308/1, sets); 75878-75886, 75896-75919 (BDTS, 308/1); 61883-61915 (MBS, 308/1); 70611-70643 (TS, 308/1); 75887-75895, 75929-75952 (DTS, 308/1); 313-321 (308/2, sets); 75920-75928 (BDTS, 308/2); 68011-68019 (MLV, 308/2); 70644-70652 (TC, 308/2); 75953-75961 (DTS, 308/2); 453-455 (308/3, sets); 75741-75743 (BDTS, 308/3); 61689-61691 (MBS, 308/3); 75992-75994 (DTS, 308/3)
Capacity	19F/344S (308/1, as built); 19F/248S (308/2); 272S (308/3); 24F/302S (308/1, refurbished)
Operator	British Rail
Depots	Clacton, East Ham, Ilford
Specifications
Car body construction	Steel
Train length	268 ft 8+1⁄2 in (81.902 m) (4-car); 189 ft 9+1⁄2 in (57.849 m) (3-car)
Car length	64 ft 0+5⁄8 in (19.523 m) (driving cars, over body); 63 ft 6 in (19.35 m) (others)
Width	9 ft 3 in (2.82 m)
Height	12 ft 7 in (3.835 m)
Doors	Slam
Articulated sections	4 (308/1, 308/2 as built); 3 (308/2 refurbished, 308/3)
Wheelbase	46 ft 6 in (14.17 m) (bogie centres)
Maximum speed	75 mph (121 km/h)
Weight	153 long tons (155 t) (308/1); 150 long tons 12 cwt (153.0 t) (308/2); 119 long tons (121 t) (308/3)
Traction motors	4 × EE 56A of 143.5 kW (192.4 hp)
Power output	574 kW (770 hp)
HVAC	Electric
Electric systems	25 kV 50 Hz AC OHLE; 6.25 kV AC OHLE
Current collection	Pantograph
UIC classification	3-car: 2′2′+Bo′Bo′+2′2′; 4-car: 2′2′+Bo′Bo′+2′2′+2′2′
Bogies	Gresley ED5, Gresley ED8, Gresley ET5, Gresley ET8
Braking system	Air (EP/Auto)
Safety system	AWS
Coupling system	Buckeye (outer), Solid shank (inner)
Multiple working	Within ER EMU stock, later only within the class
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The British Rail Class 308 alternating current (AC) electric multiple units were built between 1959 and 1961 by British Railways' Holgate Road carriage works, in York, England. They were manufactured in three batches, initially classified as AM8 units before the introduction of TOPS.