FIELD: laying electric wires or cables.
SUBSTANCE: proposed invention is concerned with installation duct base 10, covering member 50, lining member, and installation duct that has at least one detachable cable retention clamp 20 built integral with this installation duct base. Novelty is that each cable retention clamp protrudes on part 12 of installation duct base which is coupled with this part by means of fragile coupling member 21.
EFFECT: ability of detaching retention clamp from base while saving hole in its bottom part without damage to base.
49 cl, 22 dwg
