100 describes characteristics, construction, test methods, and performance criteria of optical fibre cables installed by pulling method for duct and tunnel application. Note that Recommendation ITU-T L. 10, Ed. Underground cables are pulled in conduit that is buried underground, usually 1-1. 2 meters (3-4 feet) deep to reduce the likelihood of accidentally being dug up. In extreme cold climates, cables may need to be buried at greater depths where there temperatures are colder and frost penetrates to. Confidential External SPECIFICAT ION INSTALLATION REQUIREMENTS FOR LV AND MV (13. 8 kV, 22 kV and 33 kV), UNDERGROUND C ABLES N EO M -NDS-ST D - 20 2 R ev 01. 4 Confidential External Oct 202 3 Confidential External Document History Revision code. Abstract: The design, installation, and protection of wire and cable systems in substations are covered in this guide, with the objective of minimizing cable failures and their consequences. Copyright © 2008 by the Institute of Electrical and Electronics Engineers, Inc. (FOA) was founded in 1995 to help develop the workforce to build the fiber optic networks to support a rapid expansion in communications and the Internet.