1. The neutral wire of the secondary distribution system is grounded.

2. The nominal voltage varies by ±5 percent.

3. A grounding conductor is required in the electrical cord attached to appliances.

4. The nominal voltage is being standardized and converted to 220/380.

5. Voltage tolerance ±6%

6. Frequency tolerance ±5Hz, voltage tolerance ±10%

7. A grounding conductor is required in the electrical cord attached to appliances except for class 2 appliances.

8. A grounding conductor is required in the electrical cord attached to appliances that are not double insulated.

9. Voltage tolerance ±100%

10. Electric clocks lose about 6 minutes during 24 hours.

11. Voltage tolerance ±5 to 10%

12. Current is being changed from 127/220 to 220/380, whereas the former 127/220 installations now in some residences and offices are being systematically changed.

13. Three phase, 4 wire systems such as 120/208 volts are available, also 347/600 volts for commercial establishments.

14. Frequency tolerance ±1%, voltage tolerance ±5%

15. Frequency tolerance up to 5Hz, voltage tolerance ±5%

16. Seventy-five percent of city uses 110/220, mostly older sector uses 150/260.

17. Frequency and voltage tolerances ±5%

18. Copenhagen includes Frederiksberg and Gentofte.

19. Frequency tolerance ±1%, voltage tolerance + 4% - 8%

20. 120/240 is used in the rural areas.

21. Voltage generally varies between 150 and 175 volts. Frequent power outages.

22. Voltage tolerance ±6%, frequency tolerance ±2%

23. Nominal voltage being changed to 230/400.

24. The neutral wire of the secondary distribution system is grounded at the generator.

25. A grounding conductor is required in the electrical cord attached to appliances of 10 amps and above. It is suggested but not required for appliances of less than 10 amps.