Reasons to use cable enclosures.
- Direction Change - Cable pits are positioned where cable run is required to change direction. Bends in underground conduits are undesirable.
- Drawing - Cable pits, used for drawing/hauling cables - pulling boxes - are used for pulling cable into enclosure (using pulling equipment) and looping/feeding it into next enclosure along length of cabling system. In each drawing pit, conduits are generally aligned on opposite walls at same elevation. AS/NZS 3084 stipulates requirements for cable pulling so cables aren’t damaged during installation.
- Jointing - Jointing pits, also called splice boxes, are intended for enclosing a spliced cable connection. These pits contain waterproof cable joints and are placed along straight sections of cable route. These pits must be correctly sized to accommodate size of connection.