• 本课程为精品课,您可以登录eeworld继续观看:
  • GFCI PROTECTION OF RECEPTACLES - 210.8(A)(1) THRU (A)(10)
  • 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

运放的圣经,
超级经典的运放资料,运放的圣经,TI,ron manici作品从理论到实践经典无需多说~~~
simonprince 模拟电子
15074001
我对外部中断,定时计数都能理解。但我就是不怎么能够掌握它们的综合应用呢。
15074001 单片机
MSP430定时器捕获脉冲宽度计时溢出??
如题,我外接8M晶振,对一个输入宽度为50毫秒的脉冲进行捕获,但是调试发现每次在寄存器的值不同,查数据手册应该是数值溢出了。我设的连续计数,先捕获上升再捕获下降,请朋友们帮忙解决这个问题!!感谢!!!
neal9431 微控制器 MCU
失败
今天在公司用51模拟串口,51单片机推动T,MS3705片子,结果以失败告终,惭愧啊,想跳楼的心都有了,入行两年了,还这个吊水平。
lnhjsdf 51单片机
883 Q 器件标识中Q代表什么意思
ADI等国外厂家的产品中 器件标识中会出现883 Q ,这个Q代表什么意思?
史蒂芬 模拟电子

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