Current Rolling Stock
The line is currently electrified with 25 kV AC overhead line as far south as Drayton Park and 750 V DC third rail from there to Moorgate. Services are operated by Class 313 electric multiple units (EMUs), the only units certified for use on the line. In keeping with the UK regulations for trains operating in single bore tunnels, they have emergency doors at the end of each unit, and are also designed so that when operating on 750 V DC the two motor coaches are electrically separate as far as the traction supply goes - unlike other contemporary units, there are no DC traction supply jumper cables between carriages. All Class 313 units operating over the NCL are configured with their Driving Motor B vehicle at the London end, and whilst on DC traction current are electronically limited to 30 mph, which is the maximum line speed on the Northern City Line. All stations are long enough to accept two three-car EMUs.
Read more about this topic: Northern City Line
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