tailieunhanh - Industrial Control Wiring Guide 2E Episode 2

Tham khảo tài liệu 'industrial control wiring guide 2e episode 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 1. SAFETY . Building safe equipment The second aspect of safety concerns the requirement to design construct and use electrical equipment so that it is safe and does not give rise to danger even should a fault occur. The designer of the equipment will have taken into account all these concerns in specifying the parts to be used the wire types and colours the type of enclosure and so on. Our part comes in ensuring that no parts are to be substituted without an engineering change notice manufacturers instructions for any component must be followed. Both of these aspects are statutory requirements laid down in law in a number of regulations. . The Health and Safety at Work Act HSAW This is a wide-ranging Act of Parliament covering all aspects of safety at work. It has gradually replaced the Factories Act. The HSAW allows for the introduction of regulations to control particular aspects of safety at work. These regulations which must be complied with are often produced because of European Directives which in turn are designed to harmonise the safe working conditions for all members of the European Community. Among the many regulations within the Act some have a direct influence on the machinery control panels which we are interested in for example The Electricity at Work Regulations 1989. The Provision and Use of Work Equipment. The Supply of Machinery Safety Regulations. The Electrical Equipment Safety Regulations. These affect other areas of safety besides those which concern us here and it is outside the scope of this book to go into any real detail on them. However you may find it useful to consider how they affect the way we build these panels and the components we use in them. . Standards A standard is a document specifying nationally or internationally agreed properties for manufactured goods and equipment. Regulations and standards are two different things regulations are the law and must be complied with standards on the other hand are advisory. .