FISHER CL6821X1-A5 Output logic module

FISHER CL6821X1-A5 Output logic module

Trenches may be dug by hand or, if site conditions permit, a mechanical excavator can be used. Asphalt shall be cut by a motor driven saw. Manual digging shall be used at locations where existing underground facilities are encountered. Existing facilities uncovered during excavation shall be protected, shored, braced and supported, as necessary. All protective covers, warning tapes, position markers, etc., pertaining to existing underground utilities shall be preserved during excavation and restored in position during backfilling.

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Sand Bedding/Cover and Cable Tiles 

A bedding of Clean, fine sand shall be placed at the bottom of the trench. After laying the cable, all stone and rubble that have fallen in to the trench during the cable laying shall be removed. A cover of clean, fine sand shall be placed over the cable. The thickness of sand bedding/cover shall be as per the relevant trench construction drawing. The sand bedding and cover shall be spread by hand tools to maintain an even thickness.

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