| 摘要 |
FIELD: electrical engineering; laying miscellaneous wires and cables. ^ SUBSTANCE: duct of first design alternate incorporating case of unclosed cross-sectional profile and cover has its case provided with clamps disposed on ends of side walls, longitudinal stiffening ribs on inner side of case base, rectangular projections being made inside at joints between side walls and base throughout entire length of case, and outside slots receiving packing members; duct includes at least two independent channels and is provided with at least one additional front cover. Duct of second design alternate incorporating case of unclosed cross-sectional profile and front cover has its case provided with clamps disposed on ends of side walls and longitudinal clamp provided at end of base throughout its entire length; it is also provided with at least one longitudinal stiffening rib. ^ EFFECT: enhanced reliability of wiring protection against mechanical damage due to rigid injury-preventing insulating frame preventing unauthorized access into duct channels; facilitated manufacture and installation of duct. ^ 16 cl, 10 dwg |
