SECTION 4 INSTALLATION OF APPLIANCES AND ACCESSORIES 电气部件和附件的安装
4.1 GENERAL关于战争的电影概述
The requirements of this Section apply to the lection and installation of appliances, accessories and other electrical equipment not covered in other Sections, to determine their compliance with Section 1. The requirements relate to the following:
(a) Protection against physical injury 物理伤害保护.
(b) Protection from thermal effects 热效应保护.
(c) Methods of connection to the electrical installation.
向日葵妈妈(d) External influences and environmental conditions.
(e) Adver effects on the electrical installation and the supply.
(f) Isolation and switching devices.隔离和开关装置
(g) Protective devices.保护装置
(h) Special electrical installations for particular electrical equipment.特殊电气设备的专项安装
4.2 ELECTRICAL EQUIPMENT REQUIRING PROTECTION AGAINST INJURY FROM MECHANICAL MOVEMENT 车辆报废申请因机械移动伤害，电气设备需要的保护
4.2.1 Rotating machines (motors) 旋转电机（马达）
4.2.1.1 Devices for isolation and switching 隔离和开关装置
Electric motors shall be provided with suitable devices for starting and stopping, placed so as to be easily operated by the person in charge of the motor. In the event of a fault in a motor control circuit, the stopping device shall remain effective.
中国的传统节日
Arrangements for emergency stopping of motors shall comply with Clau 2.8.5.
In the ca of electrical equipment that is remotely controlled, devices shall be provided f
or stopping the motors at all points where danger is likely to occur.
4.2.1.2 Protection against restarting or reversal 重起和反转的保护
Each electric motor shall be provided with a means to prevent automatic restarting after stopping due to a drop in voltage or the failure of the supply, where unexpected restarting of the motor might cau danger.
Where safety might be impaired by incorrect direction of rotation of a motor, suitable measures shall be taken to prevent danger from reversal of the direction of rotation.
NOTE: This applies particularly where rever-current braking is ud.
今天是什么节日啊4.3 ELECTRICAL EQUIPMENT REQUIRING PROTECTION AGAINST THERMAL EFFECTS 需要热效应保护的电气设备
4.3.1 General概述
The lection and installation of electrical equipment shall be such that the temperature c
haracteristics of the electrical equipment, properly installed and operated, do not adverly affect the electrical equipment or the electrical installation itlf, or any other installation, whether electrical or not.
Adequate ventilation shall be provided where heat is generated in normal operation, in order to maintain operating temperatures below the rated or specified limits.
NOTE: Account should be taken of the influence that temperature might have on the operational or characteristic values of the electrical equipment.
4.3.2 Prevention of fire hazard 火灾预防
4.3.2.1 Installation of electrical equipment 电气设备安装
Electrical equipment shall not be installed in a position where it might cau
a fire hazard.
Manufacturers’ installation instructions shall be obrved in addition to the
在工作方面requirements of this Clau 4.3.2.
4.3.2.2 Storage of flammable materials 易燃材料的存储
Where there is a likelihood that an area will be ud to store flammable materials, measures shall be taken to prevent ignition of such materials by sparks or high temperature sources.
NOTE: See Clau 7.9 for requirements for hazardous areas.
4.3.2.3 High surface temperatures 表面高温
Where fixed electrical equipment could attain surface temperatures that would cau a fire hazard to adjacent materials, the electrical equipment shall be —
(a) mounted on or within materials that will withstand such temperatures and are of low thermal conductance; or
(b) screened from elements of building construction by materials that will withstand such t
emperatures and are of low thermal conductance; or眉毛里长痘痘
(c) mounted at a sufficient distance from any material on which such temperatures could have deleterious thermal effects, any means of support being of low thermal conductance, so as to allow safe dissipation of heat.
NOTES:
1 Tungsten filament lamps, ELV halogen lamps, radiant heaters and infra-red lamps are examples of high temperature sources.
2 Restriction of heat dissipation from electrical equipment can result in high temperatures in the electrical equipment itlf.
Fixed electrical equipment causing a focussing or concentration of heat shall be at a sufficient distance from any fixed object or building element so that the object or element, in normal conditions, cannot be subjected to a dangerous temperature.
销声匿迹的意思
