scope:

This standard applies to the electrical protection at telecommunications and electrical power conductor entrances to telecommunications central offices and similar type facilities, and to bonding and grounding (earthing) within these facilities. Such electrical protection, bonding, and grounding (earthing) is intended to assist in protecting personnel and telecommunications plant from the effects of lightning surges power contacts, power induction, and ground potential rise.

Telecommunications facilities covered

Telecommunications facilities included are central offices, data centers, and electronic equipment enclosures (EEE). See the informative Annex C for a graphic explanation of facilities covered by this Standard and other related NIPP standards.

Application of electrical protection

Not every facility covered by the scope of this document will require the same level of electrical protection. This standard establishes, based upon the electrical environment, the criteria necessary to determine the level of electrical protection to be applied. The electrical protection measures and surge protective device applications presented shall be used where electrical protection is required. Other factors, such as those related to telecommunications service reliability, or local codes and standards, may dictate the need for electrical protection measures that exceed those described in this standard.

Topics not covered

The following topics are not covered by this standard:

- Specific electromagnetic interference mitigation designs;

- Requirements for equipment within the facilities;

- Specifications for equipment grounding (earthing) and bonding topologies. Such specifications are covered in ATIS-0300333.2007 Grounding and Bonding of Telecommunication Equipment, clause 8, Telecommunication Systems Grounding;

- Device-level specifications for electrical protection apparatus;

- Specifications for power quality or power conditioning;

- Specifications for electrical protection from high altitude electromagnetic pulse (HEMP) -- see ATIS-0632000.2005 (a revision of T1.320-1994 (R1999))1;

- Electrical protection of telecommunications outside plant (see ATIS-0600316.20081);

- The customer network interface (see ATIS-0600318.20101);

- Customer premises equipment; and

- Electrical protection of network operator-type equipment positions -- see ATIS-0600321.2005 (T1.321-1995 (R2000)¹ ).

¹ See Annex B, Bibliography, for more information on this standard.