| Cities | Type of current |
Frequency of current | Number of phases | Nominal voltage | Number of wires | Frequency stability |
| All |   | 50 |   | 220 |   |   |
| All | a.c. | 50 | 1,3 | 220/380 | 2,4 | yes |
| Type(s) of plug | |
| Type E | ![]() |
| Note(s) | |
| 1 = The neutral wire of the secondary distribution system is grounded. | |