Optical cable hole

Optical cable is usually placed in a 25 to 40 mm inside diameter (ID) sub-duct which is placed into an existing larger diameter communications conduit. Most communications conduits can be fitted with three or four sub-ducts. Sub-ducts are often referred to as innerducts. This practice describes the basic guidelines for the proper sizing of handholes for use with fiber optic cable. Familiarity with fiber optic cable requirements, practices. Handholes are shallow chambers constructed inground to access telecom cables/components with your hands. The most commonly used handholes. A handhole is a small, underground utility vault or access point designed to allow maintenance personnel to access bu...