电缆桥架及金属线槽安装技术要求.doc

电缆桥架及金属线槽安装技术要求 电缆桥架及金属线槽安装技术要求提要：镀锌电缆桥架间连接板的两端不跨接地线，但连接板两端不少于2个防松螺帽或防松垫圈的连接固定螺栓 电缆桥架及金属线槽安装技术要求 金属桥架及其支架和引入或引出的金属电缆导管必须接地或接零可靠，且必须符合下列规定： 金属电缆桥架及其支架全长不应少于2处与接地或接零干线相连接。 镀锌电缆桥架间连接板的两端不跨接地线，但连接板两端不少于2个防松螺帽或防松垫圈的连接固定螺栓。 电缆敷设严禁有绞拧、铠装压扁、护层断裂和表面严重划伤等缺陷。 直线段钢制电缆桥架长度不超过30米设有补偿装置；电缆桥架跨越建筑变形缝处设有补偿装置。 电缆桥架转弯处的弯曲半径，不小于桥架内电缆最小允许弯曲半径，电缆，最小允许弯曲半径见下表： 序号 电缆种类最小允许弯曲半径 1无铅包钢铠护套的橡皮绝缘电力电缆10D 2有钢铠护套的橡皮绝缘电力电缆20D 3聚氯乙烯绝缘电力电缆10D 4交联聚氯乙烯绝缘电力电缆15D 5多芯控制电缆10D 注：D为电缆外径 当设计无要求时，电缆桥架水平安装的支架间距为～3米；垂直安装的支架间距不大于2米； 桥架与支架间螺栓、桥架连接板螺栓固定紧固无遗漏，螺母位于桥架外侧；当铝合金桥架与钢支架固定式，有互相间绝缘的防电化腐蚀措施。 敷设在竖井内和穿越不同防火区的桥架，有防火隔堵措施 电缆桥架穿墙防火做法说明： 防火枕应按顺序依次摆放整齐，防火枕与电缆之间间隙≤1cm； 穿墙洞防火枕摆放厚度≥24cm。 支架焊接固定牢固，焊缝饱满；膨胀螺栓固定时，选用螺栓适配，连接紧固，防松零件齐全。 线槽内敷设的线应按回路绑扎成束并应适当固定，导线不得在线槽内接头，安 装在任何场所的线槽均须盖板齐全牢固。 桥架、线槽连接板的螺栓应紧固，螺母应位于桥架、线槽的外侧；其不带电的金属外壳均牢固连接为一整体，并可靠地以保证其全长为良好的电气通路。 Measures for the routine management of moral education in Middle SchoolsMethod of conventional management of moral education in middle schoolFirst, the guiding ideology:School moral education is an organic whole of the whole education work, always adhere to the school adhere to the moral education, education for this product, and actively promote the quality education, the school building efficient curriculum system of moral education, moral education, improve the sense of attraction and appeal, enhance the moral education work for through and timeliness. Teach everyone, service education and management education, and school moral education work must be with family education and community education closely together, to form a concerted pattern, and strive to create a good atmosphere for education, and to promote the all-round development of students, to establish a scientific moral education full of vigor the For long-term mechanism.Two, the goal of moral education:To guide the students to form the correct world outlook, outlook on life, values, to cultivate students unity an