Talk:Fuse (electrical)

message: A fuse is not a circuit breaker - a circuit breaker is always a resettable electromechanical device. The article talks mostly about household fuses - they are also applied in power distribution up to about 115,000 V. I'll put this one on my list. --Wtshymanski 03:21, 15 Dec 2004 (UTC)
thread_title:  Not a circuit breaker 

message: Is it really the case that "most other" jurisdictions consider the branch circuit protection to also protect the flexible cord wires? I could only speak for US/Canadian standards.  Does any other part of the world put a fuse in the attachment plug? --Wtshymanski 21:31, 15 Dec 2004 (UTC)
replies: text: The british BS1363 plug is the only general purpose plug i know of that is normally fused (there is also the british electric clock connector and a few propietry variants of the BS 1363 plug). I have seen some pictures of old spanish installations that had fuses in the sockets though (these were however very old sockets with no earth contacts so they probablly aren't representitive of modern spanish wiring). Plugwash 19:35, 14 October 2005 (UTC)
thread_title:  Jurisdictions 

message: Although I don't have the knowledge to write it, it would be nice to have a section near the end briefly explaining 
*ATO : (Automotive Technology Organization) fusible part embedded in plastic with two press-in blade connectors in line for ... etc.
*SFE :
*MDL :
etc. and add the acronyms to those pages if they exist (SFE does exist but doesn't include this).  —Preceding unsigned comment added by 71.127.68.239 (talk) 16:07, 25 November 2008 (UTC)
thread_title:  Acronyms 

message: When reading this article I found numerous references to specific applications that do not give a national or geographic label. For instance, I've lived in the US, Switzerland and GB and can identify some of the applications discussed, but I don't think most people can.  It could really be confusing. I realize that Wiki isn't a "technical reference handbook", but I think a lot of people come here for some quick information. I'll do what I can, but ... --TGC55 13:40, 29 March 2006 (UTC)
thread_title:  Article needs specific national labels 

message: The CU that is so popular in the UK is not the one shown, but an older variant. Its another Wylex, always black, with rounded corners and either a black plastic base, or with older ones a wooden base. These were a common fitting for decades, and masses are still in use, desite their safety issues.
Tabby (talk) 10:13, 2 April 2008 (UTC)
replies: text: I've added some imagery and hopefully clarified this section a bit ... I think it could do with some images of cartridge fuse installations - and could do without the MCB installations which I can’t see as  relevant.  Would anyone object if I removed them?  I also have a rather clearer set of images of a 1970s MEM CU similar to the Wylex, if we think they would be an improvement.  Not wanting to overload it... Anihl (talk) 23:47, 15 October 2008 (UTC)
replies: text: There being no objections, have now removed those images, so they're not obtruding into the subsequent section. :-) Could maybe do with a shot of a cartridge-fuse CU, though visually they're not so different from the Wylex... Anihl (talk) 01:36, 15 December 2008 (UTC)
thread_title: Fuse Boxes

message: what type of metal is used in small fuses?  —Preceding unsigned comment added by 68.73.81.133 (talk) 20:56, 9 November 2008 (UTC)
thread_title:  fuses 

message: I have decided to standardise this article on British English spelling.  (The first editor I could find to use words of variable spelling used .)—Dah31 (talk) 03:00, 16 July 2009 (UTC)
replies: text: Really?  Why? There are bigger problems with the article than spelling. --Wtshymanski (talk) 17:11, 3 August 2009 (UTC)
thread_title:  ENGVAR 

message: Three hundred lines on DIN standards and British plugs, and no explanation of how the darn thing works! --Wtshymanski (talk) 17:11, 3 August 2009 (UTC)
replies: text: Less train spotting detail and more general principles would be in order for an encyclopedia; Wikipedia is not a parts catalog. --Wtshymanski (talk) 19:23, 17 August 2009 (UTC)
thread_title: Wiki myopia

message: There's still a lot to be said about fundamentals of fuses, but instead we have a couple of long parts lists. Automotive fuses and teh stuff about two types of IEC fuses could be spun out to satisfy the parts collectors, leaving space in this article for more on fundamental principles. The big tables are very colorful but tell us nothing that we're not better off getting from a real catalog. I propose renaming  the existing section called "standard designs" (which is not a good description anyway) and factor out the fuses listed there to Fuses (IEC Low voltage), and the colorful tables for car fuses can all move to Fuse (automotive). This article can just retain some general observations on the different standards (UL, IEC, ANSI, EN, DIN, BS) and point at the factored-out articles for details. Comments?  In particular, anyone to suggest a good reason not to do this? --Wtshymanski (talk) 18:32, 24 August 2009 (UTC)
replies: text: Sounds good to me. Wizard191 (talk) 18:53, 24 August 2009 (UTC)
replies: text: fixed the link above, Fuse (automotive) now exists and I shall probably get around to creating IEC 60269 soon, and move the diazed, etc. fuses there. There's a lot more to iec 60269 than is shown here at this point. --Wtshymanski (talk) 03:18, 28 August 2009 (UTC)
replies: text: Spun out IEC 60269, I've found several references this week (a Knovel subscription is handy to have access to) and this will be my project for the weekend.  I've seen the IEC standards, too, and some summary of their prefaces and in scope is needed at IEC 60269.  Right now it only has some German and British fuses, but there's also Italian and North AMerican fuses to add (yes, the United States ia an IEC country, too!)--Wtshymanski (talk) 16:11, 29 August 2009 (UTC)
thread_title: Factoring:Wikipedia is not a parts catalog

message: "MCBs are rather prone to nuisance tripping"
No, no they are not. I think most people who saw the time / current curves for MCB's would be quite surprised at how reluctant they are to trip. I'm assuming the original author was referring to RCD's for which a cartridge fuse does not offer a suitable alternative. --82.46.177.123 (talk) 03:25, 3 December 2009 (UTC)
thread_title:  MCB's "nuisance" trip 

message: I was about to buy a fuse and got confused by the term FSU. I found an answer there: http://in.answers.yahoo.com/question/index?qid=20061104113946AAemUU9 . I guess this has to do with which potential the unit ends up at after the fuses breaks? I added it to the disambiguation page for FSU, but thought maybe someone would like to describe it in here. Cyril.holweck (talk) 15:52, 10 June 2010 (UTC)
thread_title:  FSU and SFU 

message: The fuses appear to be supplying a 3 phase capacitor bank, not a transformer.
user:Dgrinkev  —Preceding undated comment added 19:18, 22 June 2010 (UTC)
replies: text: No, that's a transformer. Not all pole-mount transformers are round. I was there when the fuse blew and I took the picture. That was a pumping station for drainage at the dam; we demonstrated that there was no interlock in manual between the two pumps installed at that station.  When both pumps were running, the fuse blew after a few seconds. Not normally a problem because one pump should always suffice for the expected volume of leakage water, but we noted this as a possibility in the inspection report anyway. --Wtshymanski (talk) 15:33, 21 October 2010 (UTC)
thread_title:  Pole mounted fuse cutouts 

message: This page should really have some graphs to show the characteristic curves for different fuses, plotting current and time to show that fuses have non linear characteristics. For example see: http://www.sicherungen.de/en/?site=kennlinien&subsite=zeitstrom Thomas d stewart (talk) 15:56, 21 October 2010 (UTC)
thread_title:  Characteristic curves graph 

message: ===Breaking capacity section===
Some incorrect information in this section currently.
In the UK, standard practice is as follows for domestic premises mains wiring: CU fuses are rated 1-3kA, PSCC = 6kA. If greater than the fuse's rupturing ability flows, the overload is interrupted not by the CU fuse but by the incomer fuse.
Perhaps rename to Interrupt Rating?
===Rated voltage section===
"Voltage rating of the fuse must be greater than or equal to what would become the open circuit voltage. For example, a glass tube fuse rated at 32 volts would not reliably interrupt current from a voltage source of 120 or 230 V. If a 32 V fuse attempts to interrupt the 120 or 230 V source, an arc may result. Plasma inside that glass tube fuse may continue to conduct current until current eventually so diminishes that plasma reverts to an insulating gas. Rated voltage should be larger than the maximum voltage source it would have to disconnect. This requirement applies to every type of fuse."
Again this is too simplistic and not really true. On cars, some loads are inductive, and if a 32v rated fuse blows, the fuse can see far more than 32v. This is acceptable since in time the circuit voltage drops to under 32v, and the circuit can then be interrupted.
Tabby (talk) 13:44, 24 January 2011 (UTC)
replies: text: What does this MEAN?  Maybe you should contact the SAE and IEC committees that rate fuses and tell them that 32 V isn't an adequate rating for 12 V automotive applications, though it's really OK becauase the voltage drops?  What is your point here? --Wtshymanski (talk) 14:25, 24 January 2011 (UTC)

text: I agree with Wtshymanski, we're talking about system source voltage and the fuse voltage rating. Maybe rewording of the part regarding arcing would help. Arcs will almost always form in a fuse interrupting a current, especially 120 V and greater. Its how quick the arc is quenched that is important to achieving a high interrupting rating. --JohnTsams (talk) 19:40, 5 July 2013 (UTC)
thread_title:  Too simplistic 

message: "Voltage rating of the fuse must be greater than or equal to what would become the open circuit voltage. For example, a glass tube fuse rated at 32 volts would not reliably interrupt current from a voltage source of 120 or 230 V. If a 32 V fuse attempts to interrupt the 120 or 230 V source, an arc may result. Plasma inside that glass tube fuse may continue to conduct current until current eventually so diminishes that plasma reverts to an insulating gas. Rated voltage should be larger than the maximum voltage source it would have to disconnect. This requirement applies to every type of fuse."
Again this is too simplistic and not really true. On cars, some loads are inductive, and if a 32v rated fuse blows, the fuse can see far more than 32v. This is acceptable since in time the circuit voltage drops to under 32v, and the circuit can then be interrupted.
Tabby (talk) 13:44, 24 January 2011 (UTC)
replies: text: What does this MEAN?  Maybe you should contact the SAE and IEC committees that rate fuses and tell them that 32 V isn't an adequate rating for 12 V automotive applications, though it's really OK becauase the voltage drops?  What is your point here? --Wtshymanski (talk) 14:25, 24 January 2011 (UTC)

text: I agree with Wtshymanski, we're talking about system source voltage and the fuse voltage rating. Maybe rewording of the part regarding arcing would help. Arcs will almost always form in a fuse interrupting a current, especially 120 V and greater. Its how quick the arc is quenched that is important to achieving a high interrupting rating. --JohnTsams (talk) 19:40, 5 July 2013 (UTC)
thread_title: Rated voltage section

message: "Fuse markings[6] will generally convey the following information;
# Breaking capacity"
Most fuses in the UK, whether 1.25", 20mm, mains plug, car, or CU, don't have this on them.
"n the UK, older electrical consumer units (also called fuse boxes) are fitted either with semi-enclosed (rewirable) fuses (BS 3036) or cartridge fuses (BS 1361). "
Some new ones are too. MCBs have become more popular now, but rewirable & cartridge fuses are still legal & being installed.
"The "Wylex standard" consumer unit was very popular in the United Kingdom until the wiring regulations started demanding Residual-Current Devices (RCDs) for sockets that"
Ironically the Wylex fusebox pictured is not the type that has been so popular in previous decades. Public domain picture of one at http://wiki.diyfaq.org.uk/index.php?title=CU
", it is desirable to blow (clear) only the fuse (or other overcurrent device) electrically closest to the fault. This process is called "coordination" and m"
in the UK its called 'discrimination'
Tabby (talk) 13:46, 24 January 2011 (UTC)
replies: text: If it's an approved fuse, it implicitly must meet the standards for that class of fuse. Let's say that you won't see the kA interrupting rating stamped on the fuse but you will see some approval agency logo, which implies that the fuse meets the standards for that class of fuse. What percentage of the world's fuse applications are for protecting house wires in the UK? --Wtshymanski (talk) 15:17, 24 January 2011 (UTC)
thread_title:  Asstd corrections 

message: The word "fuse" does indeed derive from the Latin fusus, but the first meaning of fusus is not "to melt" (that would be fundo, fundere).  See this Online Latin Dictionary.  Fusus is the perfect participle of fundo, fundere and as such its meaning is: extended, spread out, opened wide, which is a more useful way of thinking about the function of a fuse, since when it operates its ultimate function is to open the circuit (by melting).
Mousemusic (talk) 08:26, 26 January 2011 (UTC)
replies: text: WP:BOLD. --Wtshymanski (talk) 14:10, 26 January 2011 (UTC)
replies: text:  Actually the Latin etymology is a back formation. The origin are the French and Italian words for "spindle" (fusée,fuso)  walk victor falk talk 12:50, 28 February 2011 (UTC)
replies: text: Fascinating - this is why I read the talk pages more than the articles themselves. See also Fusee (horology) ! Explains why 'spindle' ! Also related to Rifling - Rifle = Fusil in French ? Fucile in Italian ? Or was it the Match of a Matchlock ... ? Fuse (explosives) wound round a stick. --195.137.93.171 (talk) 00:30, 12 July 2012 (UTC)
thread_title:  Etymology 

message: The section "Packages and Materials" describes how fuses are available in a variety of sizes and shapes but not what those shapes and sizes are. The cartridge fuse is mentioned but the standard types of cartridges (1AG,2AG,...) are not. A picture of blade fuses is shown in a later section but that package is not mentioned in this section. If I were holding a fuse attempting to identify its packaging with this page (and I was) then I would probably be out of luck (I was). 
I think this section could really use a table defining some industry-standard fuse cartridges; perhaps multiple tables depending on the diversity of package types (by geolocation or industry?) Some pictures would definitely be useful in this section too. 
I found my answer for package sizes at http://search.digikey.com/us/en/cat/circuit-protection/fuses/655421 - no promises but at some point I'll try to add the content I was looking for. 134.121.79.160 (talk) 22:05, 21 February 2012 (UTC)
replies: text: If I was looking for an air cleaner for my car, I wouldn't be looking at an encyclopedia - I'd find a parts catalog. --Wtshymanski (talk) 22:25, 21 February 2012 (UTC)
thread_title:  Packaging types and dimensions 

message: FF = ultra fast blow
 F = fast blow
 M = medium blow
 TT = very slow blow
 L = low blow current
 H = HRC = high rupture current
 S = sand filled
Notable ?
Can anyone find a better source than fixya.com ?
--195.137.93.171 (talk) 00:39, 12 July 2012 (UTC)
thread_title:  Speeds, Types and markings 

message: Interrupt Rating is more common to fuses where as Breaking Capacity is use on breakers. There are slight differences in the terms. Some fuses have breaking capacities significantly higher than the interrupt rating. The rating just implies the fuse passed the IEC or UL testing for short circuit current interrupting. Interrupt Capacity vs Interrupt Rating | Interrupt Rating
--JohnTsams (talk) 21:21, 5 July 2013 (UTC)
thread_title:  Breaking Capacity -> Interrupt Rating 

message: I don't think this is correct, "In electronics and electrical engineering, a fuse (from the French fusée, Italian fuso, "spindle"[1])". 
The word fuse comes from "Fusible Link", "Fusible Cut-out", and "Fusible Safety Shunt". Fusible = easily melted, link = a connection between.
See US patent, US1098870, US502330, US480802. 
"...the combination, with the fusible wire of a safety-fuse, of one or more movable disks threading said wire, the openings in said disks being approximately of the size of the wire..."
--JTsams  talk 20:18, 27 May 2015 (UTC)
thread_title:  Etymology is wrong. 

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thread_title:  External links modified 

message: Horrible and pathetic content as compared to the German version here ! . needs a total rewrite Shrikanthv (talk) 14:55, 7 February 2018 (UTC)
replies: text: Looked at a Google translation of the German page and wasn't impressed with it.  Too much catalog information, no history, repetitive and scattered discussion of parameters. All the auto fuse stuff is specialized content best suited to its own article.  Vast long tables of fuse dimensions for someone's favorite standard. --Wtshymanski (talk) 21:55, 7 February 2018 (UTC)
thread_title: Horrible content