• 本课程为精品课,您可以登录eeworld继续观看:
  • RECEPTACLES IN HALLWAYS - 210.52(H)
  • 登录
课程介绍
相关标签: 电子系统
Switchboards are designed with busbars for fuses or circuit breakers that are used for protecting and supplying feeders and branch circuits. Panelboards are designed with a permanently installed main circuit breaker or single set of fuses for disconnecting the number of circuit breakers or fuseholders installed to protect and supply feeders or branch circuits.

SUPPORT AND ARRANGEMENT OF BUSBARS AND CONDUCTORS
408.3

Busbars shall be held firmly in place in the enclosure and shall be arranged in such a way to allow adequate space for conductors to be terminated. Busbars shall be sized with enough capacity to handle the normal currents in amps of the electrical system. In addition, they shall carry safely any type of short-circuit or ground-fault condition.

CONDUCTORS AND BUSBARS ON A SWITCHBOARD OR PANELBOARD
408.3(A)

Conductors and busbars on a switchboard, panelboard, or control board shall be so located as to be free from physical damage. Service sections of such boards shall be separated from the other electrical components. These components shall be properly secured in an approved manner. 

Note, conductors entering a certain section shall terminate in such section, except where it is not practical for control, interconnecting conductors, or other conditions of use.

OVERHEATING AND INDUCTIVE HEATING
408.3(B)

The arrangement of busbars and conductors shall be such as to avoid overheating due to inductive effects. The inductive effect of each conductor is neutralized when grouping all conductors together. To accomplish the minimizing of heating effects, the ungrounded (phase) conductors, grounded (neutral) conductors, and equipment grounding conductors, where used, shall be in the same enclosure, raceway, cable, cord, etc. (See Figure 7-1)

显示全部 ↓
推荐视频

    猜您喜欢

    推荐帖子

    出个人闲置DSP2812+XDS510USB
    现因个人转行原因出06年购合众达DSP2812+XDS510一套。。价格一套共:600元有意请加QQ:350563705 或致电:13828499087
    啤酒樽 淘e淘
    求低价远距离的无线视频传输解决方案?
    目前在谈一个远距离的无线视频传输的案子,大概要保证300米左右的稳定传输,需要全向,wifi不够远,目前找到的解决方案比较贵,要好几百的成本,是否有什么成本低一点的解决方案(100以内)?
    PCBEMC 无线连接
    求助串口高手
    哪位大侠用过TI公司的TL16C554芯片啊。我现在被这个折磨了很久了还没解决掉。我在自己作的DSP板子上用的,554自己发送数据时不会出错,但554接收0xFF、0xFA等之类的数据时会变成为零。接收其他数据正确。用示波器测试数据在到达接收引脚时候都是正确的。实在想不出问题出在哪里。有哪位高手用过554的请赐教。谢谢!我qq:121402432我qq一直在线隐身的。
    uuiikid 嵌入式系统
    Windows CE及其开发工具.pdf
    Windows CE及其开发工具.pdf
    yuandayuan6999 单片机
    关于atmel烧录的问题
    刚买了块at89lv51,可是在stc的开发板上烧写总是出错,请问可能是什么原因?是电压问题?还是烧写驱动,烧写工具的问题,怎么解决?因为要用到低电压驱动的单片机,谁知道的麻烦告诉一声,谢谢了。
    yangprime 51单片机
    七个粽子------晒礼品
    本着来而不往的原则,晒下芯币兑的礼品。这次我的芯币只够这档的,但是包装讲究,EEWORLD每逢佳节总是非常人性化,十分亲民。这一点我喜欢。有龙形图案的盒子,上书“五月五 吃粽子 赛龙舟”。打开包装里边有七个真空粽子。我统统收进冰箱。准备开吃。{:1_102:}
    ddllxxrr 聊聊、笑笑、闹闹

    推荐内容

    热门视频更多

    可能感兴趣器件

    完成课时学习+分/次

     
    EEWorld订阅号

     
    EEWorld服务号

     
    汽车开发圈

     
    机器人开发圈

    About Us 关于我们 客户服务 联系方式 器件索引 网站地图 最新更新 手机版 版权声明

    站点相关: 汽车电子 智能硬件

    北京市海淀区中关村大街18号B座15层1530室 电话:(010)82350740 邮编:100190

    电子工程世界版权所有 京B2-20211791 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号 Copyright © 2005-2025 EEWORLD.com.cn, Inc. All rights reserved