Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

ACCOUNTING POLICIES

Summary of Estimated Useful Lives of Property, Plant and Equipment

The following are the main categories of property, plant and equipment with their related estimated useful lives:

Classes of property, plant and equipment	Years of estimated useful life
Buildings	10 – 60
Plant and equipment	6 – 65
IT equipment	3 – 15
Fixtures and fittings	2 – 35
Motor vehicles	5 – 10

In addition, for further information, the following is a more detailed breakdown of the class of plant and equipment:

Class of plant and equipment	Years of estimated useful life
Generating plant and equipment
Hydroelectric plants
Civil engineering works	10 – 65
Electromechanical equipment	10 – 45
Combined cycle power plants	10 – 25
Renewable	20
Distribution plant  and equipment::
High-voltage network	10 – 60
Low- and medium-voltage network	10 – 50
Measuring and remote control equipment	10 – 50
Primary substations	6 – 25
Natural gas transportation
Gas pipelines	20