scope:

This Recommendation provides bonding configurations and earthing for telecommunication equipment installed inside different buildings in the following cases:

1) buildings with different earthing and power feeding conditions;

2) buildings with the same earthing and power feeding conditions.

This Recommendation:

• is intended to facilitate the internetworking between different equipment (interconnected by metallic links);

• can be used for new installations and, if possible, for the expansion and replacement of the existing installations;

• is not intended to replace national regulations on bonding and earthing.

The user should refer to [ITU-T K.27] for bonding configurations and earthing inside the telecommunication building; to [ITU-T K.35] for bonding configurations and earthing at remote sites; to [ITU-T K.66] for bonding and earthing of telecommunication installations inside a customer premises.

Bonding requirements between a building and an adjacent tower are outside the scope of this Recommendation.

NOTE - In this case, the user should refer to [b-ITU-T K.47], [b-ITU-T K.56] and [ITU-T K.71].