Talk:Short circuit

message: This article was listed on Wikipedia:Requests_for_page_expansion as being too technical, so I tried to make it a little more accessible.  I replaced the following paragraph with a summary statement, but thought I would leave it here for reference. 
:Wire sizes specified in building and electrical codes are usually determined by their ability to carry the rated load without overheating (called the "ampacity"). Additional wire capacity may be used in the interests of efficiency. In the case of very long wire runs, the ability to carry the current to trigger the breaker must also be considered; it is possible to create a long wire run that will carry the normal working load and provide sufficient voltage at the load, but when overloaded will dissipate the excess current in heating the wire, while still below the wire's ampacity and the circuit breaker's limit current. This occurs when the voltage drop in a short circuit condition equals the supplied voltage and the resultant current flow is below that of the load limiting device. In this case the wire must be oversized to ensure that the circuit protection device operates. Such considerations apply to runs exceeding several hundreds of meters.
--Bcordes 13:56, Jun 23, 2004 (UTC)
Really?, 
If you want "technical", you should read some of the medical articles on Wikipedia, that talk in a language that only doctors and wannabe doctors understand.
Having said that, this article uses only US references, as in, the rest of the world calls "ampacity", everyone else in the world calls current-carrying capacity. Trumpy (talk)  —Preceding undated comment added 09:19, 25 September 2012 (UTC)
thread_title:  Too technical? 

message: Picky detail: Short circuits are not prevented by fuses and such.  The short circuit occurs and the circuit then opens because the fuse blows.  The fuse prevents damage from a short circuit..
— Preceding unsigned comment added by 66.227.89.85 (talk • contribs) 22:04, September 27, 2004
And your point is?
All fuses and circuit-breakers conform to a simple I²t curve, the higher the current, the quicker the protection will operate. Trumpy (talk) 09:30, 25 September 2012 (UTC)
thread_title:  Fuses don't prevent short circuits 

message: "charge is allowed to flow between a phase and the electrical earth or between two phases" - this doesn't seem very accurate to me - a short circuit can occur in lots of other combinations of conductors (phase to neutral, or any number of other possibilities in the case of more complex apparatus especially DC-powered systems). The "unintended path" definition sounds much better. Any objections to me rewording this?
— Preceding unsigned comment added by Ali@gwc.org.uk (talk • contribs) 03:16, January 8, 2005
:Does neutral not count as a phase?  I know much less about AC than I do DC.  I also agree that the "unintended path" definition is more general, if less "clinical".  If you've got suggestions for a better formal definition, I'd love to hear/see them... Bcordes 16:57, Feb 7, 2005 (UTC)
I think too much emphasis is placed on a short being unintentional. There are many instances (such as illustrated in the final two paragraphs) in which a short is desired. One technical definition might be, “A short is when two nodes of a circuit are directly connected.” In many cases this is a fault and unintentional. Also, the term “resistance” is used in the definition. I feel a more accurate term would be impedance. An ideal inductor has no resistance, but it is not considered a short. In a DC case however, this inductor would act as a short. I also argue that in a transformer (or power outlet as in the article) there is already very low resistance between the phases; but there is a large impedance. I offer that impedance be the prominent term used in the article.Mak17f 19:07, 10 December 2005 (UTC)
replies: text: I completed agree, and in bad form, I reworded the article to remove the emphasis.Rmcii 22:01, 12 March 2006 (UTC)
thread_title: definition

message: I havent heard this term. Are there any refs?--Light current 00:14, 8 January 2007 (UTC)
replies: text: It is a common term in connection with operational amplifiers, so should be easy to find. There is already a virtual ground article. The present section in this article has about nothing to do with the subject and should be redirected to virtual_ground or deleted. Meggar 00:46, 8 January 2007 (UTC)
replies: text: No thats virtual earth or ground. We know what that means. Virtual S/C has no meaning IMO--Light current 00:48, 8 January 2007 (UTC)
replies: text: You really must try to look things up. There are 926 Google matches to "virtual short" and "op amp" .  In any case there is nothing salvagable in that section, so to save a vast waste of time it should just be deleted. Meggar 01:00, 8 January 2007 (UTC)
replies: text: OK its a relatively new term regarding op amps. Thats completely differnt from the electrical engineering notion of short circuits. A very low impedance is not the same as a 'dead short'--Light current 01:12, 8 January 2007 (UTC)
thread_title:  Virtual short 

message: I think that this statement should be removed.  Generally speaking, people can die from the resultant conditions of a short circuit (explosions, fires, etc), but this is not always the case.
Also, it is misleading readers into thinking that a person can cause a short circuit.  In most cases if a person contacts two phases or a phase to earth/neutral, the resistance of their body is high enough to even prevent the tripping of over current divices such as fuses or circuit breakers.
It is also breaking a point ( it seams to be inserted in a paragraph about something else).  I will remove in a week unless someone else see's fit to remove earlier
Blaab 08:59, 25 October 2007 (UTC)
thread_title:  Remove: Also when a short circuit happens people die. 

message: Clod amateur home electrician me made a loop of his home wires. When I
closed the circuit breaker I knew something was wrong as all thru the
house the wires were vibrating loudly in their conduits in the walls.
One second was long enough for me to quickly open back up the circuit
breaker.
So mention this rarely observed brief phenomenon that is certainly forgotten while extinguishing the probably ensuing total house fire. Jidanni (talk) 00:24, 28 February 2008 (UTC)
thread_title:  Wires vibrating loudly in their wall conduits 

message: I suggest a defintion for short circuit current (Isc). This is used in solar panels.--Linegen (talk) 14:23, 13 November 2008 (UTC)
thread_title:  Isc 

message: In the opening summary, it says "A short circuit in an electrical circuit is one that allows a current to travel along a path along where essentially no (or a very low) electrical impedance is encountered." Should 'electrical impedence' be changed to 'resistance'?  —Preceding unsigned comment added by 67.158.25.23 (talk) 21:49, 14 May 2010 (UTC)
thread_title:  impedance vs resistance? 

message: This article focuses too much on unintended short circuits.   The very first sentence describes it as a fault.  In reality shorts are frequently used to bypass certain series elements intentionally, often referred to as shunts.  The first paragraph and "definition" sections especially need a broader description.  How's this for size?  "A short circuit is a conductive path between two otherwise separate conductors, which links isolated networks or causes current to bypass its normal path.  Often the short circuit is the result of an undesired event, and causes excessive current to lead to further unintended destructive consequences.  In other situations the short circuit can be planned, where current is intended to travel through the short instead of the usual path for maintenance or for some other intentional purpose."  — Preceding unsigned comment added by 74.62.48.2 (talk) 20:27, 21 January 2015 (UTC)
thread_title:  Short circuits are not always "unintended" or "abnormal" 

message: The article refers briefly to "open circuit" as the opposite of a short circuit. Someone might elaborate on that, perhaps in a separate article. Most commercial power circuitry today provides a fixed voltage, and a short circuit causes the system to attempt to supply unsafe amounts of current to maintain a constant voltage. If the system were instead designed to supply a constant current, then an open circuit would be a fault, inviting the supply to increase voltage to unsafe levels. Streetlight circuits in the 19th century were like that, perhaps 6 or 8 amps to all the lights in series. Children were cautioned never to attempt to touch a streetlamp. Snezzy (talk) 12:56, 22 July 2023 (UTC)
replies: text: I don't see a strong need, but I don't have any objections. Constant314 (talk) 19:02, 22 July 2023 (UTC)
thread_title:  Open circuits