• 本课程为精品课,您可以登录eeworld继续观看:
  • (a) CAPACITOR CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G)
  • 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

    用来用去 还是这个最好用,你是怎么用的?
    如图,长期实践证明,这个模型 最好理解,沟通,和实现。大家能举个例子,让别人看你的例子 就是到 你做过什么吗。
    5525 综合技术交流
    CST仿真PCB的结果是怎么显示的?
    CST仿真PCB的结果是要在哪里显示出来的?看样子是仿真完了,可是就是不知道从哪里打开仿真结果
    lingking 综合技术交流
    zigbee好学吗?
    zigbee好学吗?协议栈之类的复杂吗?
    wellpanda 无线连接
    电阻精度与常用阻值
    电阻精度与常用阻值大家看看电阻常用的阻值,做设计的时候别弄个没得卖的电阻出来哦!有需要的下下来看看吧/
    20023974 DIY/开源硬件专区
    汽车电子范围太大,我来发个好玩的。
    如果有一辆车:前面看象奔驰,后面看象宝马;这一定是吉利。如果有一辆车:样子一直没变,但名称一直在改;这一定是桑塔那。如果有一辆车:三厢和二厢卖一个价;这一定是POLO。如果有一辆车:小排量反而比大排量贵;这一定是派力奥。如果有一辆车:它叫轿车但价格和摩托车差不多;这一定是江南奥拓。如果有一辆车:它的屁股怎么看都象是受过伤一样;这一定是三厢赛欧。如果有一辆车:它的鼻子怎么看都象是受过伤一样;这一定是
    wljmm 汽车电子
    简易电子温度指示器电路
    620)this.width=620;" border=0>
    探路者 消费电子

    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