Safety regulations examples

National safety regulations determine to what extent toxic gases are measured. For example, every Japanese home has to have sensors that monitor toxic and explosive gases. 

For example, an alternative may be safer in that it does not meet the criteria for very high concern, but it may have other hazards such as corrosiveness or flammability. However, these hazards are generally easier to control and fall under appropriate health and safety regulations. If there is a serious health and safety issue with a proposed substitute, that alternative would not be deemed an acceptable alternative. 

Capacity Another consideration is the capacity of the laboratory to handle the work involved in a given method. For example, a capillary electrophoresis method would not be chosen if the laboratory does not have the instrument. It is also important to look at such factors as other equipment needed, the supplies needed, etc., or whether the laboratory can follow the required health and safety regulations, etc. Sometimes there may not be enough manpower or equipment to handle the sample work load. In that case, storage and refrigeration can also be a problem. 

Since any material that will burn at any temperature is combustible by definition, it follows that this word covers all such materials, irrespective of their ease of ignition. Thus the term flammable actually applies to a special group of combustible materials that ignite easily and burn rapidly. Some materials (usually gases) classified in shipping and safety regulations as nonflammable are actually noncombustible. The distinction between these terms should not be overlooked. For example, sodium chloride, carbon tetrachloride and carbon dioxide are noncombustible sugar, cellulose and ammonia are nonflammable... 

The way that new fire-safety regulations have come into being is from a reaction or response to a particular problem. There are many examples to choose from here, but we will focus on three plastics in cars, polyurethane foam, and polymers for electronics. 

What if we have an exposed conductor that is not connected to earth (such as for equipment with a two-wire ac cord), or if earthing is itself not an acceptable level of protection for that particular type of equipment as per safety regulations Then, besides the layer of basic insulation, we need another insulating layer (with identical dielectric withstand capability). This is called supplementary insulation. Together these two layers (basic + supplementary) are said to constitute double insulation. We could also use a single layer of insulation, with dielectric withstand properties equivalent to double insulation (i.e. 3000 V ac or 4242 V dc). That would then be called reinforced insulation. So for example, if the equipment is by design, meant only for a two-wire ac cord, we would need two layers of approved insulators (or... 

Note What were traditionally called X and Y capacitors are now more accurately called X2 and Y2 capacitors respectively. From the viewpoint of safety regulations (like impulse voltage rating etc.), the XI and Y1 are considered virtually equivalent to two X2 and Y2 capacitors in series, respectively. For example Y1 caps are impulse tested to 8 kV. Also, the original terms X-caps and Y-caps have recently started getting defaulted to refer to the more uncommonly used (higher voltage) XI and Y1 capacitors instead. 

This is why, in power stations, coal is pulverized before allowing it to burn. Fine powders can sometimes react extremely rapidly. For example, stringent safety regulations need to be appHed to grain and flour factories, since fine grain and flour can burn explosively fest in air (Exercise 14D). 

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