• 本课程为精品课,您可以登录eeworld继续观看:
  • WALL RECEPTACLE OUTLETS - 210.52(A)(1) THRU (A)(4)​​​​​​​
  • 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

    用户评论

    暂时无评论

    猜您喜欢

    推荐帖子

    求助:sensortile固件有没有ADC的简单例子?
    哪位大神知道sensortile固件有没有ADC的简单例子?
    wugx MEMS传感器
    用multisim仿真pwm波经ir2104放大后驱动buck电路问题
    用multisim仿真pwm波经ir2104放大后驱动buck电路,但是像图片里显示的一样,为什么没有放大呢?原因在哪里?请老师们指点一下!!!
    刘123 电子竞赛
    使用SensorTag作病人(老人)监护
    对医院、养老院,监护对象的活动情况需要了如指掌,TI的SensorTag将是这个应用最好的选择。另外,蓝牙作用距离可以达100米,SensorTag的耗电极省,体积很小,作为间谍应用也是可以考虑的。
    dontium 无线连接
    你真的了解光耦吗?
    [p=28, 2, left][color=rgb(51, 51, 51)][font=宋体]相信很多刚接触光电元件器的新手都不是十分了解[b]光耦[/b]的分类,下面就来科普一下。[/font][/color][/p][p=28, 2, left][color=rgb(51, 51, 51)][font=宋体]在光电子DATA手册中,其型号超过上千种,通常可以按以下方法进行分类:[/font][
    qwqwqw2088 模拟与混合信号
    键盘扫描码转化为字符的问题
    请问在DDK编程中 得到键盘的扫描码 怎么转化为ASCII码呢在键入的键盘是A-Z时 为什么一下代码不能打印出ASCII呢 A-Z时扫描码对应的就是ASCII码吗ULONG buf_len = 0;size_t i;PKEYBOARD_INPUT_DATA buf;buf=Irp->AssociatedIrp.SystemBuffer;buf_len=Irp->IoStatus.Informati
    zhrglchp 嵌入式系统

    推荐内容

    热门视频更多

    可能感兴趣器件

    EEWorld订阅号

    EEWorld服务号

    汽车开发圈

    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 © 2005-2023 EEWORLD.com.cn, Inc. All rights reserved