Underground Secondary Distribution Box

The Secondary Distribution Box (SDB) receives power from Main Power Distribution box via an extender cable and provides a central power distribution to feed normal branch circuits to the electric floor modules through snap-on extender cables. A feeder usually begins with a feeder breaker at the distribution substation. Many feeders leave substation in a concrete ducts and are routed to a nearby pole. REFERENCES This. This document provides specifications, ordering information, illustrations, and application instructions for the various sizes of non-concrete and precast concrete enclosures used in PG&E electric underground secondary distribution. Proper installation and maintenance of underground systems requires reliable and convenient enclosures and pad-mounted equipment. ACS takes the basic idea of zone wiring and combines it with pre-cut, pre-tested cable and plug-in connectors, to provide power and telecommunication systems that can be installed under raised floors (The Intelligent Floor), or in accessible ceilings (The Intelligent Ceiling).