Dale End Power Station
From Graces Guide
1890 the Birmingham Electric Supply Co acquired a site in Dale End, where a generating station and offices were erected.
The supply was originally at 110 volts direct current on the two-wire system, but was gradually changed to three-wire (220v across the outer pair).
c1899 the voltage was increased from 220 to 440 volts across the outers, and consumers' lamps were supplied at 220 volts
1896 a second generating station and a sub-station were built; the latter was supplied with direct current at 1,200 volts, the current being stepped up and reduced by motor transformers.
1900 The company was acquired by the City of Birmingham.
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