Timeline of railway electrification in Norway

The Thamshavn Line opened in 1909, and remained in revenue use until 1973, after which it was converted to a heritage railway.

This was largely due to NSB's program to remove all steam locomotives, either by electrification or by dieselization.

In the late 1950s and 1960s, several to-be electrified lines were operated with diesel locomotives as an interim solution.

This finished all the planned electrifications, and the authorities deemed the remaining lines unprofitable to electrify because of low traffic.

[11] In 1912, all German railways agreed to use the 15 kV  16.7 Hz AC standard, which was later adopted first by Sweden and then by NSB.

Sydvaranger chose to install the only mainline direct current (DC) and third rail system.

The list excludes industrial and short branch lines, as well as systems installed at ports and yards.

A small blue locomotive hauling three wooden passenger cars parked at a wooden platform
The Thamshavn Line became Norway's first electrified when it opened in 1908.
A four-car multiple unit running across a snow-covered plain with mountains in the background
Class 73 train near Dombås on the Dovre Line
Map of the railway lines in Norway.
— electrified lines
— non-electrified lines
— disused or heritage lines
A small wooden train station building with a railway ferry in the background
Mæl Station where the Rjukan Line connects with the Tinnsjø railway ferry
A three-unit locomotive hauls an ore train out of a tunnel, surrounded by snow.
Dm3 -hauled ore train on the Ofoten Line
Two commuter trains parked at a mid-sized station
Voss Station is the terminus of the Bergen Commuter Rail , operated with Class 69 units.
A four-car multiple unit running down a single track with fields on both sides and a forest in the background
Class 70 train near Tangen on the Dovre Line
A four-car multiple unit running along a double-track line between two cliffs; in the background is a motorway.
Class 73b train on the double-track section of the Østfold Line near Vestby
A small station with two platforms; above are three overhead wires and the area is surrounded by forest
Overhead wires at Movatn Station on the Gjøvik Line