Welcome to the
Information on a wide range of housings,
Firstly, there's the internationally recognised protection rating system (IP).
Any housing (or indeed any electronic equipment enclosure) which is designed to provide protection against the elements, will be classed according to its protective integrity; so for example, a dustproof housing might be IP 44, and a fully weatherproof unit IP 65 or higher:-
The first IP number relates to the items resistance to 'dust' so IP 0* means that it is completely open, whilst IP6* is completely sealed against dust.
In general, CCTV equipment intending to be usedoutdoors, should be a minimum of IP5*
The second number relates to resistance to liquids, so IP00 means both dust and liquid have open access, and IP66 is sealed against both dust and jets of liquid. In practice, most camera housings are IP 55 or higher, but if they are less than IP54 they really shouldn't be used outdoors, and certainly not in exposed locations.
In addition to the IP rating systems, their are also European CENELEC standards which relate to gas and temperature protection. These exacting standards are enforced by BASEEFA in the United Kingdom.
Flameproof equipment must comply with the appropriate British (BS 5501) and European Standards (En 50 014/018) .
Protection against explosion is rated at Ex, and temperature resistance to standard T6.
Alternative international standards apply in other countries.
IMPORTANT: No material may be reproduced, copied or redistributed from this site,
© doktorjon.co.uk 2004 - 2008