NS172
Design requirements for cable pits, vaults and bays
NS172: Design requirements for cable pits, vaults and bays
Details the design requirements for power cable pits, joint vaults and joint bays. For communication pits, refer to NS204 Communications Pits - specifications and Installation Guidelines.
Scope
This Network Standard describes the minimum design requirements for new pits, joint vaults and joint bays for use with power cables and pilots. It does not cover construction requirements, authority approvals, safety or environmental requirements relating to construction. Normal industry practices apply in addition to any Ausgrid design requirements detailed herein.
This Network Standard does not cover 33kV joint bays that comprise of a natural ground or concrete working floor only, without the use of concrete side walls to form the bay.
For works involving significant modifications to existing pits, joint vaults or joint bays that would have been originally constructed to a previous standard, the modified design shall comply with the requirements of this Network Standard to the extent that is reasonably practicable.