Cable trench at the bottom of the distribution box foundation
The ICP must lay 11kV (and below) cables directly onto the bottom of the trench. Where a sand bedding material is required for the base of a trench the ICP shall then excavate the trench depth an additional 75mm and install sand to a finished compacted depth of 75mm. om must be free of stones, loose earth (including scuffed material) and sharp objects. In backfilled areas, the trenc bottom must be compacted to the satisfaction of ATCO's Electricity Representati The trench bottom must also be kept level, to facilitate the laying-in of the cable. - The foundation steel and cable trench under the cabinets, stands, and boxes should be inspected and qualified, and the foundation and embedded conduits for floor-standing cabinets, stands, and boxes should be accepted as qualified. The ICP must excavate all trenches and joint holes to the dimensions, appropriate for the type and quantity of apparatus to be installed, as detailed in Section 3.
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