International Standard Industrial Classification of All Economic Activities, Revision 4 (2008)

Code:  D
Description:  Electricity, gas, steam and air conditioning supply
This item includes:  This section includes the activity of providing electric power, natural gas, steam, hot water and the like through a permanent infrastructure (network) of lines, mains and pipes. The dimension of the network is not decisive; also included are the distribution of electricity, gas, steam, hot water and the like in industrial parks or residential buildings.

This section therefore includes the operation of electric and gas utilities, which generate, control and distribute electric power or gas. A
This item also includes:  lso included is the provision of steam and air-conditioning supply.
This item excludes:  This section excludes the operation of water and sewerage utilities, see 36, 37. This section also excludes the (typically long-distance) transport of gas through pipelines.