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target="_blank">技术中?/a> >> <a href="/Article/ArticleList32/" target="_blank">电气百科</a> >> <span>正文</span></div> <!-- main_content begin--> <div id="jvj4gy5l4dy" class="maincontent"> <!-- left begin --> <div id="jvj4gy5l4dy" class="news_left"> <div id="jvj4gy5l4dy" class="brand_news_details"> <h1>电气百科:如何选用电线电缆阻燃等级?考虑?个因?/h1><table style="border-bottom:1px dotted #e4e4e4;" align="center"><tr><td><div id="jvj4gy5l4dy" class="news_mes">文章来源:广东华洋电?作者:??点击?span id="HitNum"></span>?时间?span id="dTime">2019/10/22 13:03:21</span><input type="hidden" id="ID" value="100905840"/><input type="hidden" id="TypeID" value="2"/></div> </td> <td><div id="ckepop"></div></td></tr></table><div id="Content" style="display:none;">[电气百科:如何选用电线电缆阻燃等级?考虑?个因素]:电线电缆伴随着社会智能化越来越普及,现代化布线就像人类的神经系统一样,延伸到建筑中的每一个角落,里面布满了密密麻麻的线缆,尤其像现在正在大力建设的数据中心,各种各样的摩天大楼基建,他们所承载的线缆数?..</div><div id="jvj4gy5l4dy" class="brand_news_con"><p style="text-indent:2em;"> 电线电缆 </p> <p style="text-indent:2em;">北京pk10赛车网址 伴随着社会智能化越来越普及,现代化布线就像人类的神经系统一样,延伸到建筑中的每一个角落,里面布满了密密麻麻的线缆,尤其像现在正在大力建设的数据中心,各种各样的摩天大楼基建,他们所承载的线缆数量更是一个惊人的数量。大家每次做工程或者做项目时只会想到:这个项目要用到多少型号的线缆、要用到多少?如此众多的电线电缆型号,而它们的耐火阻燃要求却被人们忽视 ,从而成为引起火灾的巨大隐患,那么项目工程设计中要考虑电线电缆耐火阻燃等级的几个要素?金福友电缆提供几点建议,以供大家参考: </p> <p style="text-indent:2em;"> 一、电缆敷设环?</p> <p style="text-indent:2em;">北京pk10赛车网址 电缆敷设环境在很大程度上决定电缆受外火源侵袭机率大小和着火后延燃成灾的可能性大小,例如:直埋或单独穿管的(金属,石棉,水泥管)可以采用非阻燃电缆,而置于半密闭桥架、线槽或专用电缆沟(带盖板的),可以适当降低阻燃要求一到二级,建议选用阻燃C类,或者阻燃D类?</p> <p style="text-indent:2em;"> 因在此环境下受外因侵袭机会少,即使着燃由于空间狭水闭塞也容易自熄,不易成灾。反之,室内明敷,穿房爬楼,或者暗道,夹层,隧洞廊道,人迹火种容易到达着火后空间相对较大并空气容易流通者,其阻燃等级应适度调高。建议选用阻燃B类,甚至阻燃A类?</p> <p style="text-indent:2em;"> 当上述环境更处于高温炉前炉后或易燃易爆的化工,石油,矿井环境中则必须从严处置,宁高不低。建议选用阻燃A类,或者采用无卤低烟阻燃耐火A类?</p> <p style="text-align:center;text-indent:2em;"> <img src="http://oss.yxbest.cn/kindeditor/img/20191022/20191022130102_4877.png" alt="" /> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> 金福友电?</p> <p style="text-indent:2em;"> 二、电缆敷设数量多?</p> <p style="text-indent:2em;">北京pk10赛车网址 电缆数量影响电缆阻燃等级的高低,主要是同一空间内电缆非金属材料的多少确定阻燃类别高低,在计算电线电缆非金属材料体积的时候,同一空间的概念是指电缆着火时,其火焰或热量可以不受阻挡地辐射到附近电线电缆并能够将其引燃的空间。比如有防火板相互隔离的桁架或槽盒其同一通道应指每一个桥架或槽盒,若上下或左右无任何防火隔离,一旦着火相互影响,其电缆非金属体积计算时以统一纳入为宜?</p> <p style="text-indent:2em;"> 三、电缆的粗细 </p> <p style="text-indent:2em;">北京pk10赛车网址 在同一通道内电缆非金属物体积确定之后,综观电缆外径大小,若小的居多(直?0mm以下)则阻燃类别宜从严处理,反之若大的居多(直径40mm以上)宜偏向低级别,其原因是外径较小电缆吸热量小,容易引燃,而外径偏大的电缆吸热量大不宜引燃。大火形成火灾的关键是引燃,引而不燃火自熄,燃而不熄火成灾?</p> <p style="text-indent:2em;"> <span>北京pk10赛车网址四、阻燃与非阻燃电缆不宜在同一通道中混?/span> </p> <p style="text-indent:2em;"> 在同一通道中敷设的电线电缆,其阻燃等级一致或相近为宜,低级别或非阻燃电缆的延燃对于高级别的电缆而言即为外火源存在,此时即使A类阻燃电缆也有着火的可能性?</p> <p style="text-indent:2em;">北京pk10赛车网址 五、项目工程的重要程度和火灾的危害深度而异确定电缆阻燃级别 </p> <p style="text-indent:2em;">北京pk10赛车网址 对重大工程项目用的电缆,比如30MW以上机组,超高建筑,银行金融中心,大型、特大型人流集中场所等,在其它因素同等条件下其阻燃级别宜偏高、偏严,建议选择低烟无卤耐火阻燃型电缆?</p> <p style="text-indent:2em;"> 六、动力电缆与非动力电缆应互相隔离敷设 </p> <p style="text-indent:2em;"> 相对而言,动力电缆容易着火,因为它是热态的,而且有短路击穿的可能性,而控制电缆信号控制电缆因电压低,负载小处于冷态,本身不易起火,因此建议,在同一空间二者隔离敷设,并且动力电缆在上,控制电缆在下,因火势向上,并在中间加防火隔离措施,防止着烧物溅落?</p> <p style="text-indent:2em;">北京pk10赛车网址 以上是金福友电缆为大家总结的六个阻燃电缆敷设及使用时应考虑到的因素,事实上,只有在施工时充分地考虑各种隐患发生的可能性。做到科学敷设,阻燃电缆才能真正地发挥作用,做到真正的用电安全?</p></div><div id="jvj4gy5l4dy" class="meneame"><span class="disabled">< </span><span class="current">1</span> <span class="disabled">> </span></div> <div id="jvj4gy5l4dy" style="text-align: center;padding-top: 10px;"><img src="/images/code.jpg" alt="关注有惊?" /></div> <div id="jvj4gy5l4dy" class="news_bot_mes">中国工业电器网:此内容转载于合作媒体或互联网其它网站,中国工业电器网登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述!</br>新闻、技术文章投稿QQ?28246603 邮箱:news@yxbest.cn</div> <h2 class="related">相关阅读</h2> <ul class="related_con"> <li>· <a href="/text/32/191111/AD100906616_1.html" target="_blank">离子奥秘 走进兰州重离子加速器国家实验?/a></li><li>· <a href="/text/32/191107/AD100906517_1.html" target="_blank">电气百科:能源也可以“种出来?/a></li><li>· <a href="/text/32/191028/AD100906085_1.html" 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