scope:

Application to existing overhead lines

This NNA is applicable for new high-voltage overhead lines only, not for existing lines in the Netherlands.

NOTE: If some planning/design or modification works on existing lines in the Netherlands has to be performed, the structural integrity shall be assessed based on the following generic building standards:

- NEN 8700 "Assessment of existing structures in case of reconstruction and disapproval - Basic Rules" and

- NEN 8701 "Assessment of existing structures in case of reconstruction and disapproval - Actions

NEN 8700 and NEN 8701 shall be used in conjunction with EN 50341 part 1 and this NNA.

NEN 8700 and NEN 8701 are based on NEN-EN 1990.

EN 50341-1 "Overhead electrical lines exceeding 1 kV" is based on EN 1990.

Where in NEN-EN 1990 and NEN-EN 50341 is referred to 'design' that term should be read in the context of the applying this standard to a review or assessment, by an analysis, as 'verification'. In case of construction re-design this

Application to cables for telecommunication

This NNA includes the requirements for application of plastic cables, with metal or without (ADSS) metal, for telecommunication, as well as for conductor/earthwire (groundwire) systems (e.g. wraparound,....).

 Application to mounting of telecommunication equipment

This NNA is applicable for fixing of structural elements for telecommunication (e.g. dishes), if mounted on power line supports (towers), especially regarding the wind forces and ice loads on such fixed elements.

Applicability

This NNA is applicable to overhead electrical lines exceeding 45 kV (A.C.).

To overhead electrical lines exceeding 1 kV (A.C.) but lower than 45 kV (A.C.) Part 1 is applicable without special national conditions (snc) or national complements (ncpt).