請問邊度有 BS standard download?

在網上不難找到：
http://www.studyemc.net/simple/index.php?t1298.html
但只是中文簡體版。

如想找英文版，可以入HKU Library download。但當然要有Library card 先入得。識得人都得.......

BS 1363

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A typical BS 1363 plug


圖片參考：http://upload.wikimedia.org/wikipedia/en/thumb/b/b0/Bs1363-socket.jpg/150px-Bs1363-socket.jpg



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BS 1363 type electrical socket. Note the closed shutters (Red) blocking entry of foreign objects.
British Standard BS 1363 specifies the type of domestic AC power plugs and sockets most commonly used in the United Kingdom, Ireland, Malta, Malaysia, Singapore and many former British colonies. In these countries, the system is colloquially also known as the 13 amp plug/socket. Other plug types, such as IEC 309 is only seen in industrial and some outdoor applications while BS 546 is limited to old installations and specialised applications, where either the BS 1363 plug is unsuitable or where mateability with the standard variety is not desired e.g. where lamps are controlled by a switch/dimmer.
Trading standards legislation in both the UK and Republic of Ireland requires that all normal electrical goods sold in either country should be fitted with a BS 1363 / IS 401[1] plug.
A BS 1363 plug has two horizontal, rectangular pins for phase (commonly termed 'live' by non-specialists) and neutral, and above these pins, a larger, vertical pin for an earth connection. Unlike with most other types of sockets, the earth pin is mandatory in the BS 1363 plug, as it is needed to open a shutter in the socket. It also polarises the plug. Moulded plugs for unearthed, double-insulated appliances may substitute this contact with a plastic pin. Virtually all non-fixed domestic equipment is connected using the BS 1363 plugs, the main exceptions being equipment requiring more than 13 amperes (e.g. larger electric cookers, which are hard-wired), and remotely switched, non-fixed lighting (which use proprietary or BS 546 plugs).
Because typical British circuits (especially ring circuits) can deliver much more power than an appliance flex (power cord) can safely handle, these plugs are required to carry a cartridge fuse. The fuse is manufactured to BS 1362 and are normally rated at 3, 5, 10 or 13 amperes. The maximum load that can be placed on a socket is 13 A; triple and larger sockets are fitted with a 13 A fuse of the same type used in the plugs. The plugs and sockets are designed to carry up to 250 volts AC, 50 hertz. For information on the safe installation of BS 1363 sockets, see the article on Electrical wiring (UK).
This plug is often described as the safest in the world and to many outsiders it often seems excessively safety conscious and somewhat cumbersome. The high extraction force can be inconvenient, particularly for people with weak hands, such as the elderly. To counter this, plugs with handles, and straps to provide existing plugs with a handle, have been produced but have not been popular. In addition, most wall sockets have built in switches, reducing the need for plug removal when power is not required. The switch is just for convenience, and is not a regulatory requirement. The large size can make the plugs inconvenient when there are many plugs in a small space, as on power strips. On the other hand the side entry flex (cable) gives the combination of plug and flush socket a low profile to the wall (which is useful if plugging something in behind a cupboard, for example).


圖片參考：http://upload.wikimedia.org/wikipedia/en/7/72/Three_pin_mains_plug_%28UK%29.png