Different types of fuses pdf

Please forward this error screen to sharedip-192186250162. They are occasionally used in non-automotive electrical products. Unofficially, the “different types of fuses pdf-profile mini” fuse is sometimes incorrected called “micro” since the term means smaller than mini, but recently fuses using the micro name have been released. The mini fuses were developed in the 1990s.

Blade type fuses can be mounted in fuse blocks, in-line fuse holders, or fuse clips. 2, 3, 4, 5, 7. 5, 1, 2, 3, 4, 5, 7. Blade fuses use a common coloring scheme for the micro2, micro3, low-profile mini, mini, and regular size fuses, and a partial color similarity with the maxi size fuses. The following table shows the commonly available fuses for each size group. Bosch type fuses usually use the same color-coding for the rated current.

The physical length of this ceramic type of fuse is either 1 inch or 1. 25 inch, with conical ends. Glass tube fuses have straight ends. Lucas type fuses usually use the same color-coding for the rated current. Lucas fuses with non Lucas fuses. 4″ diameter glass tube fuse have a different length as compared to the standard US item.

4 amperes to 30 amperes. There are a number of lookalike fuses which can easily be confused with these. 2AG size, type AGB, 0. 3AG size, type AGC, 0. Some are time delayed, slow reacting, or have leads for terminals used in circuits without a fuse holder. They are used also in electric vehicles, e. Because strip fuses require the use of tools for replacement they are therefore legally considered non-serviceable components for end-users.

This page was last edited on 6 November 2017, at 18:59. This article is about mains power connection devices used in domestic and light commercial environments. 1880s and were initially two-pin designs. These were usually sold as a mating pair, but gradually de facto and then official standards arose to enable the interchange of compatible devices. BS 546 is also the precursor of current Indian and South African plug standards. BS 546 plugs and sockets are still permitted in the UK, provided the socket has shutters. In this article, the term ‘plug’ is used in the sense defined by IEC 60050.

Sockets are designed to prevent exposure of bare energised contacts. These include plugs with insulated sleeves, sockets with blocking shutters, and sockets designed to accept only compatible plugs inserted in the correct orientation. Modern British sockets for domestic use are normally manufactured as single or double units with an integral face plate and are designed to fit standard mounting boxes. Historically, two-pin sockets without earth were used in Britain, but their use is now restricted to sockets specifically designated for shavers and toothbrushes. There is an alternative spelling, adapter, but adaptor is the form usually used in standards and official documents.

There are certain characteristics common to British mains plugs and sockets intended for domestic use. The brass pins appear relatively solid and large compared to others. Since 1934, the contacts of a socket have been specified in terms of the pins of the plug, rather than by specifying the contact dimensions. The pins of both round pin and rectangular pin plugs are arranged in a triangular fashion, the earth pin being the larger and longer pin at the apex. Earthed sockets are designed to be incompatible with two-pin plugs. This was revised by the Plugs and Sockets etc. The Plugs and Sockets, etc.

There were concerns that consumer safety was compromised by the substantial quantity of counterfeit and unsafe electrical plugs and sockets being placed on the UK market and also by the provision of electrical equipment without an appropriate means to connect it to the mains supply in the consumer’s home. The regulations also contain a provision for the approval of non-BS 1363 conforming plugs when “the plugs are constructed using an alternative method of construction which provides an equivalent level of safety in respect of any risk of death or personal injury to plugs which conform to BS 1363 and is such that plugs of that type may reasonably be expected to be safe in use. EU countries each have their own regulations and national standards and CE marking is neither applicable nor permitted on plugs and sockets. Despite this CE Marking is sometimes fraudulently used, especially on universal sockets.

As electricity became a common method of operating labour-saving appliances, a safe means of connection to the electric system other than using a light socket was needed. England was introduced by T. The earthed consumer plug has several claimants to its invention. Catalogue included several earthed sockets intended for industrial use. The earliest domestic plug and socket is believed to be that patented by T. This was shortly followed by patents from W.

In 1885, two-pin plug designs appeared and in 1889 there were two-pin plugs and sockets in the GEC catalogue. These were clearly recognisable as two-pin plugs and sockets, but with no indication as to pin size or spacing, they were sold as pairs. By the time the 1911 GEC Catalogue was published two pin plugs and sockets were being offered with specifications in amps, but still no indication as to pin size or spacing. Also offered were two-way and three-way “T pieces” or multi-way adaptors for the 3 A and 5 A plugs, two way only for the 10 A. Versions of the concentric plug and socket were now offered rated at 5 A and 10 A. At the same time Lundberg were offering the 2.

Tucker were offering a range of 5 A, 10 A and 20 A plugs and sockets. 1915, and revised in 1919 with the addition of 15 A and 30 A sizes. By the 1927 revision of BS 73 four sizes of two-pin plugs and sockets were standardized: 2 A, 5 A, 15 A and 30 A. Following the introduction of BS 4573 in 1970 there were no longer any UK domestic uses for two-pin sockets except for shavers, so BS 372 was renamed “”Two-pin Side-entry Wall Plugs And Sockets For Special Circuits”” and subsequently withdrawn. BS 4573 shaver plug with its parallel 5. 1 mm pins that are 16.

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