SR Class CP
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The Southern Railway (SR) gave the designation CP to the fleet of AC electric multiple units used on lines in the Crystal Palace area.
[edit] Construction
The CP (Crystal Palace stock) units were built in 1911-1912 to provide the electric train stock required for the LBSCR AC overhead electrification to Crystal Palace and the surrounding area. This stock comprised of some 90 cars, which were used in three-car formations.
After the replacement of the AC overhead equipment by the 660 V DC third rail system adopted as standard by the SR, the carriages that formed these units were rebuilt accordingly.