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In electrical engineering, IEC 60269 is a set of technical standards for low-voltage power fuses. [1] The standard is in four volumes, which describe general requirements, fuses for industrial and commercial applications, fuses for residential applications, and fuses to protect semiconductor devices.
A fuse consists of a metal strip or wire fuse element, of small cross-section compared to the circuit conductors, mounted between a pair of electrical terminals, and (usually) enclosed by a non-combustible housing. The fuse is arranged in series to carry all the charge passing through the protected circuit. The resistance of the element ...
[53] The original BS 1363:1947 specified fuse ratings of 3 A, 7 A and 13 A. [54] The current version of the fuse standard, BS 1362:1973, allows any fuse rating up to 13 A, with 3 A (coloured red) and 13 A (coloured brown) as the preferred (but not mandated) values when used in a plug. All other ratings are to be coloured black.
Framework for assessment against BS 8900-1; BS 9997 Fire risk management systems. BS 9999 Fire safety in the design, management and use of buildings. Code of practice; BS 15000 for IT Service Management, , now ISO/IEC 20000; BS 3G 101 for general requirements for mechanical and electromechanical aircraft indicators
Many accessories for electrical installations (e.g., wall sockets, switches) sold in the UK are designed to fit into the mounting boxes defined in BS 4662:2006—Boxes for flush mounting of electrical accessories—Requirements, test methods and dimensions, with an 86 mm × 86 mm square face plate that is fixed to the rest of the enclosure by ...
Because of the presence of a neutral fuse, and in the event that it blew, the neutral conductor could not be relied on to remain near ground potential; and, in fact, could be at full line potential (via transmission of voltage through a switched-on light bulb, for example). [5] Modern electrical codes generally do not require a neutral fuse.
In Hong Kong, the main electrical wiring system used is BS 1363. In old buildings, the BS 546 system is also common. Due to its proximity to mainland China, electrical products from there are present in Hong Kong, especially those as a result of cross-border purchase carried out by mainland Chinese immigrants. Nevertheless, even if the product ...
British Standards (BS) are the standards produced by the BSI Group which is incorporated under a royal charter and which is formally designated as the national standards body (NSB) for the UK. [1] The BSI Group produces British Standards under the authority of the charter, which lays down as one of the BSI's objectives to: [ 2 ]