Although specified as a dual-voltage unit, Class 365s have never operated with this capability since they were built with only one system of traction current pickup. The first 16 (365501 to 365516), which worked briefly for Network SouthEast before the South Eastern franchise was awarded to Connex South Eastern, were originally supplied only with DC shoe gear for use on the 750 V third-rail system During testing and commissioning, 365502 ran briefly on the AC network and was the main reason for this unit being chosen as the one subleased from Connex South Eastern to WAGN to bolster unit availability in the aftermath of the Potters Bar accident in 2002). In this configuration the maximum speed was .