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Topic: Voltage sparks and danger

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	PowerPedia:Voltage - PESWiki (Site not responding. Last check: 2007-10-06)
		In this case, the voltage (loosely stated) or the voltage drop across the device (better, but not always stated for brevity) is really the first voltage taken (relative to ground) on one terminal of the device minus (hence a voltage difference) a second voltage taken (relative to ground) on the other terminal of the device.
		Voltage is additive in the following sense: the voltage between A and C is the sum of the voltage between A and B and the voltage between B and C.
		High voltage is used in electrical power distribution, in cathode-ray tubes, to generate X-rays and particle beams, to demonstrate arcing, for ignition, in photomultiplier tubes, and high power amplifier vacuum tubes.
	peswiki.com /index.php/Voltage (3379 words)

	Alternate Locking Devices for Plug and Receptacle-Type Connectors on Mobile Battery-Powered Machines [Rules and ...
		When complete separation of voltage classifications is not possible with barriers or partitions where both medium- and high-voltage circuits or both low- and high-voltage circuits are connected to a component or device, that component is required to be located in the motor contactor or disconnect device compartment.
		One danger inherent with high-voltage equipment is that excessive electrical stress can cause premature breakdown of insulating materials, which could result in arcing, thus creating an explosion hazard in the presence of corona.
		The requirement that persons performing electrical work be qualified for all voltages assures that persons performing work on low- and medium-voltage circuits are qualified to identify hazards that may exist on high-voltage circuits in close proximity of their work.
	www.dol.gov /msha/regs/fedreg/final/2002004863.htm (19001 words)

	High voltage - Wikipedia, the free encyclopedia
		Laypersons may consider household mains circuits (100–250 V AC), which carry the highest and most dangerous voltages they normally encounter, to be high voltage.
		In digital electronics, a high voltage is the one that represents a logic 1 (1.1–5 V).
		The largest-scale sparks are those produced naturally by lightning.
	en.wikipedia.org /wiki/High_voltage (2031 words)

	GreCon - Safety for your Production. Spark Detection and Extinguishment Systems
		Sparks are a constant danger in those factories where combustible materials are being worked, exhausted, transported, filtered or dried.
		The danger is when two of the three elements necessary for the creation of fires and explosions are transported, namely: air and ignition sources (sparks).
		Spark detection and extinguishment systems are able to detect even the smallest of sparks or hot particles in extraction ducts, drop chutes or mechanical conveyors, and to instantly trigger countermeasures.
	www.grecon-us.com /html/spark_detection_article.htm (2236 words)

	High Voltage Games
		This voltage is switched by the capacitor (that's the white bucket; the capacitor is made out of bottles of salt water sitting in a bucket of salt water; something like sodium sulfate would be better since it wouldn't decompose by electrolysis) and the spark gap.
		The spark gap also needs adjustment; the length of the spark gap is roughly equivalent to the trigger voltage of a diac, which means that the spark gap length sets the peak voltage across the capacitor and the primary.
		Many people demonstrate coils by drawing sparks from the terminal using a metal object held in their hand; I do not do this due to the risk that the coil should throw a streamer to its primary and establish a neat conducting path between you and what is essentially a ~20 mA ideal current source.
	cryolite.ath.cx /perl/skin/hivolt (716 words)

	exp:h - high voltage // danger of death
		The air that the spark is passing through is ionised making it a preffered route for the arc, so when it heats up and begins to rise it drags the arc up the metal vee pulling it wider as it goes.
		Sparks, in contrast to arcs, are defined as single, very short electric discharges across an air gap.
		The voltage across a burning arc is much lower than the voltage needed to ignite it, typically only a few hundred or thousend volts.
	x0.na.nu /hv.html (3393 words)

	PIRA Bibliography -
		Sparks from a Wimshurst are no longer but are much more intense when a Leyden jar is connected.
		Sparks from an electrostatic generator are intensified when a Leyden jar or aluminum plates are connected in parallel with spark gap.
		Intentionally low voltage models of the Marx generator and the Cockroft-Walton circuit allow the waveforms to be shown as a demonstration without high voltage probes or danger.
	physicslearning.colorado.edu /PIRA/PiraSubTOC.asp?STopic=5C30 (378 words)

	Electromagnetic Clutches and Brakes from Indian Precision Engineers, India.
		Sparks between the brush and the slipring should be avoided at all costs since it will produce a pitted surface.
		The sparks which tend to occur between the relay contacts, due to the inductive load when the coil is de-energized, should be preventedby using a spark quenching capacitor as in fig.
		A high self-induced voltage is produced at the time of disengagement of clutch or brake.
	www.ipeblr.com /instructions.htm (542 words)

	How Things Work - Microwave Ovens
		Absent any efforts on their parts to make the containers intrinsically safer, it would be nice to have some items to help the water boil: reusable or disposable inserts that you could leave in the water as it cooked or an edible powder that you could add to the water before cooking.
		Is it dangerous to eat the food after it was put into the microwave with a metal object.
		As soon as the high voltage disappears from the magnetron tube and it stops emitting microwaves, the microwaves in the cooking chamber begin to diminish.
	rabi.phys.virginia.edu /HTW/microwave_ovens.html (19226 words)

	Nikola Tesla
		As the high voltage high frequency currents oscillate in the primary inductor of the Tesla coils they produce a power high energy electromagnetic field which surrounds the secondary high voltage coil.
		The high voltage high energy capacitors store the charge until the voltage is high enough to break down the air in a high voltage spark gap.
		As the spark gap breaks down it conducts the high voltage charge directly in the high voltage inductor coil which forms the primary circuit of the high voltage Tesla coils.
	www.jimfurey.com /sciencenow/tesla/tesla.html (885 words)

	ATEQ USA: IONIZED AIR FLOW INDUSTRIAL LEAK TEST INFORMATION PAGE
		Spark testers also use high voltage to detect a defect, with very high current that generates visible sparks seen by an operator.
		The "spark testers" are very dangerous to the operator since they use high voltage and enough current to kill a healthy adult human.
		Another variation of the spark tester using a modified HiPot electrical appliance tester instead of a visual control to detect a defect is also potentialy lethal.
	www.atequsa.com /ionicleaktest.asp (642 words)

	high voltage misconceptions: static electricity
		Electric currents are caused by voltage, and the voltage in a circuit is caused by the imbalances of charge which are present on the surface of the metal wires.
		The common belief that Franklin easily survived a lightning strike is not just wrong, it is dangerous: it may convince kids that it's OK to duplicate the kite experiment as long as they "protect" themselves by holding a silk ribbon with a key tied in the middle.
		Sparks and lightning are "static electricity," even though sparks and lightning are about the most dynamic things imaginable.
	www.eskimo.com /~billb/emotor/stmiscon.html (5666 words)

	voltage information -- voltage (Site not responding. Last check: 2007-10-06)
		Voltage Converter Transformers Power 110v 220 volts 220v 110v Voltage conver...
		The Cockroft-Walton voltage multiplier was invented in the 30's by two men who gave it their names to serve as a way of producing very high...
		Voltage Voltage is electric potential energy per unit charge, measured in joules per coulomb (= volts).
	www.shwavoltage.info (914 words)

	High Voltage (Site not responding. Last check: 2007-10-06)
		It was the sparks he felt, every time he touched her, every time he had touched her since they were small.
		It was the danger he had of melting every time he looked into her green eyes, the fire of Hurricane DeLuca that managed to leak inside the cracks of his stone wall.
		He put it up on the wall in his kitchenette to remind him of how dangerous it was to be with Maria--the high voltage that ran through his veins every time he touched her.
	www.roswellunderground.com /highvoltage.html (1118 words)

	High Voltage Sparks and Arcs
		The rate of rise of the voltage pulse from the Marx Generator was adjusted to maximize the "efficiency" of long spark propagation.
		Although first reports of huge 100+ meter sparks were initially met with skepticism by scientists and high voltage engineers, a number of power engineers and scientists have subsequently witnessed similar events at this facility.
		It is believed to have occurred in 2000 or 2001, and the footage was captured by a local resident from property that was adjacent to a country club and golf course.
	205.243.100.155 /frames/longarc.htm (3878 words)

	Rescue Workers Say Hybrid Cars a Danger (Site not responding. Last check: 2007-10-06)
		But for rescuers at accident scenes, they represent a potential new danger: a network of high-voltage circuitry that may require some precise cutting to save a trapped victim.
		They've published guides showing where the electric components are on their models; on the Toyota Prius and other hybrids, the high-power cables are colored bright orange to catch the eye of a rescue worker or a mechanic.
		Voltage is not a measure of electrical strength.
	www.freerepublic.com /focus/f-news/1129473/posts (2153 words)

	Gennita Low - An exciting new writer in the romantic suspense genre
		In short, ‘Into Danger’ is a true masterpiece, and readers everywhere are advised to not to miss this new author, Gennita Low’s, future works.
		Into Danger is a high voltage, sensually charged debut novel that's tireless and cunningly plotted -- but it's also as difficult to decipher as a coded message when one is lacking the know-how to do so.
		Despite a few flaws, Into Danger is a solid, readable first novel, and one can only hope that some of her characters (especially those SEALS) show up in future books.
	www.gennita-low.com /reviews_IntoDanger.html (3021 words)

	Jump Starting Your Motorcycle
		The result is that the voltage provided is the sum of the voltages of both batteries.
		When you connect batteries in parallel, by placing the positive terminal of one into contact with the positive terminal of the other and the same with the negative terminals, then the voltage that results remains the same, but the amount of current that can be produced is raised.
		You want any spark that might occur to be as far away from the battery as is reasonably possible.
	www.msgroup.org /TIP104.html (1066 words)

	Various Schematics and Diagrams
		The output voltages are roughly equal plus and minus when referenced to point B. I assume the module would also operate on DC (say, 110 to 150 V) with the discharges repeating continuously at about 2 kHz.
		An input voltage of about 4 V is needed to start oscillation (reducing R1 or increasing R2 would lower this at the expense of efficiency at higher voltages) but it will continue well below 3 V. The measured input current at various input voltages for two lamp types are shown in the chart below.
		The tube voltage would be probably the very high voltage pulse at the very beginning of the tube supply period of the inverter cycle, and approx.
	repairfaq.ece.drexel.edu /sam/samschem.htm (16402 words)

	Static Electricity and People
		For car-door sparks: if you touch the metal shell of the car as you climb from your seat, there will be no high-voltage buildup and no painful spark.
		This won't stop the spark, but the spark is less painful when it bores into your knuckle rather than into your delicate fingertips.
		The spark will still jump, but it will not be painful, since it blasts a little hole in the tip of the key instead of in your finger.
	www.electricitycentral.com /articles/staticsparks.htm (3330 words)

	PC World - Avoid Static Damage to Your PC
		For most of us, it's annoying; for some, dangerous (fireworks and explosive makers have to take special precautions to avoid static sparks); and for the sensitive electronics inside a PC, static can be a computer-killer.
		Since all standard AC wiring includes a common ground, you used to be able to ground yourself by touching the case of your PC while it was switched off but still plugged into the wall outlet.
		However, since today's PCs have voltage flowing through their motherboards whenever they're plugged in (5 volts direct current are used for switching the PC on and off), it's all too easy to accidentally short something and zap your motherboard, without static being involved at all.
	www.pcworld.com /howto/article/0,aid,82184,00.asp (1506 words)

	United Nuclear- High Voltage Equipment (Site not responding. Last check: 2007-10-06)
		As the large 10" diameter counter-rotating disks revolve, a high voltage charge is produced by the brushes alternately contacting the metal foil sectors and the plastic disks.
		This charge is stored in a Leyden Jar capacitor, and when the electrodes on the device are gradually brought together, a large spark jumps the gap.
		Since the current is very low, there is little danger from the high voltage, but yet it is effective for creating sparks and performing interesting static electricity experiments.
	www.unitednuclear.com /wimshurst.htm (199 words)

	Austin-Sparks.Net - Toward The Mark: Vol.1, No.2, Mar-Apr 1972
		The man who is being used and blessed of God is in special danger, for the moment that any servant of God allows himself to be made much of, is the time when Christ is no longer glorified but rather obscured.
		At first there was a hissing and a crackling, and then a large blue spark flashed across between the two polished aluminium spheres with a noise like a whiplash.
		There was a loud crack, a blue spark, but nothing more, and I am still alive to tell the tale.
	www.austin-sparks.net /mags/ttm01-2.html (15092 words)

	Metamorphosis
		Rotor who had volunteered to come also, as the city was a dangerous place to
		dangerously, and was saved a fall to the ground by Rotor.
		This was causing his sword to quiver dangerously close to Sonic's throat,
	www.angelfire.com /oh5/highvoltage/metamorphosis.htm (10104 words)

	MIT EHS - Signs and Stickers
		Danger - Hazardous Area No smoking, open flames, sparks
		Danger - High voltage (small and medium stickers, large sign)
		Danger - Refrigerator not approved for flammable materials
	web.mit.edu /environment/ehs/topic/order_signs.html (55 words)

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