page_title: List of British Rail electric multiple unit classes
section_title: Tube Stock
hierarchical_section_title: List of British Rail electric multiple unit classes / DC EMUs / Southern Region units / Tube Stock
caption_attribution_description: Island Line Class 483 No. 004 in London Underground livery at Smallbrook Junction
context_page_description: This page lists every electric-powered multiple unit allocated a TOPS classification or used on the mainline network since 1948.
  British Rail operated a wide variety of electric multiple units for use on electrified lines:
  AC units operate off 25 kV alternating current from overhead wires. Where clearances for the overhead wires on the Great Eastern Main Line and London, Tilbury and Southend railway routes were below standard, a reduced voltage of 6.25 kV AC was used. The Midland Railway units used 6.6 kV AC. Under the computer numbering, AC units were given a class in the range 300-399.
  DC units operate off 650-850 V direct current from a third rail on the Southern Region and North London, Merseyside and Tyneside networks. The Manchester-Bury Railway line used 1,200 V DC from a side-contact third rail. The Manchester South Junction & Altrincham and "Woodhead" and initially the Great Eastern Railway routes used 1,500 V DC from overhead wires. Under the computer numbering, DC units were given a class in the range 400-599.
caption: Island Line Class 483 unit no. 483004 at Smallbrook Junction
exif: {"Image ImageDescription": "<KENOX S630  / Samsung S630>", "Image Make": "Samsung Techwin", "Image Model": "<KENOX S630  / Samsung S630>", "Image Orientation": "Horizontal (normal)", "Image XResolution": "96", "Image YResolution": "96", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "708271", "Image DateTime": "2007:02:21 09:37:00", "Image Copyright": "COPYRIGHT, 2007", "Image ExifOffset": "279", "EXIF ExposureTime": "1/125", "EXIF FNumber": "14/5", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "80", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2007:02:21 09:37:00", "EXIF DateTimeDigitized": "2007:02:21 09:37:00", "EXIF CompressedBitsPerPixel": "4369/2164", "EXIF ShutterSpeedValue": "27/4", "EXIF ApertureValue": "0", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "297/100", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "29/5", "EXIF Tag 0x9215": "1", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "2034", "EXIF ExifImageLength": "1434", "EXIF RelatedSoundFile": "RelatedSound", "EXIF ExposureIndex": "1", "EXIF SensingMethod": "One-chip color area", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "0", "EXIF FocalLengthIn35mmFilm": "35", "EXIF SceneCaptureType": "Standard", "EXIF Contrast": "Normal", "EXIF Saturation": "65440", "EXIF Sharpness": "Normal"}