NG TS 3.08.22
National Grid Technical Specifications - Methods and Procedures for Underground Duct Laying and Associated Works
|Publication Date:||1 January 1993|
This specification provides general guidelines for new construction of underground ducts and associated jointing boxes in carriageways, footways, grass verges and open country. The modification of any existing ducts of jointing chambers will be covered by other documentation issued by the NGC, Telecom Electric or the relevant Regional Electricity Company.