
	Where results make sense

Topic: Lightning conductor

Related Topics

Conductor material

Henry Wood conductor

Conductor music

Conductor transportation

Conductor British Army

List of famous conductors

List of conductors

electrical conductor

heat conductor

lightning conductor

List of conductors orchestra

Conductor science

In the News (Tue 15 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Directory:Lightning Power - PESWiki
		The section of lightning channel across the insulator acts as a conductor, causing a short circuit.
		The main limiting factor of implementing a lightning capturing scheme such as this was the inability to be able to store large amounts of electricity for later use.
		Lightning power harvesting devices could be rotated from one area to another so that no one region's ecosystem is deprived of its quota of needed natural factors derived from lightning.
	peswiki.com /index.php/Directory:Lightning_Power (2160 words)

	Lightning Protection for Historic Buildings - Tim Donlon
		The lightning conductor is not an 'attractor' as the movement of positive ions is governed by the prevailing wind conditions.
		The lightning flash appears to have travelled through the open and weathered joint, similar to the way water moves through minute fissures via capillary action, and the mechanical force of the strike has blown a section of the spire stonework away.
		The installation of a lightning conductor to an historic building also requires the selection of a qualified contractor, who is capable of understanding the importance and delicacy of the various features and the nature of the construction to which the system is being installed.
	www.buildingconservation.com /articles/lightning/lightn.htm (2221 words)

	Lightning Strike News (Site not responding. Last check: 2007-10-25)
		Lightning is an electrical discharge of millions of volts, commonly from cloud to cloud or cloud to ground, but occasionally from ground to cloud.
		The primary lightning, or main down, conductor carries current from the top of the mast directly to a ground plate or ground strip that is attached to the exterior of the hull.
		The secondary conductor from a backstay and bonding conductors for other large metal objects that are located well after in the boat should not be run forward to the main ground plate near the mast.
	www.4marine-electronics.com /news-lightning-strikes.htm (2294 words)

	Lightning rod (Site not responding. Last check: 2007-10-25)
		Lightning rods sometimes possess a short circuit to the ground that is interrupted by a thin non-conductor over which lightning jumps.
		Lightning can damage structures made of most materials (masonry, wood, concrete and even steel) as the huge currents involved can heat materials, and especially water to high temperatures causing fire, loss of strength and explosions from superheated steam and air.
		The patent was granted due to a fault in Franklin's original theory of operation; the pointed lightning rod actually ionizes the air around itself, rendering the air conductive, which in turn raises the probability of a strike.
	www.worldhistory.com /wiki/L/Lightning-rod.htm (1193 words)

	NASD: Boating-Lightning Protection
		Lightning occurs when the difference between the positive and negative charges, the electrical potential, becomes great enough to overcome the resistance of the insulating air and to overcome the resistance of the insulating air and to force a conductive path between the positive and negative charges.
		Lightning strikes represent a flow of current from negative to positive, in most cases, and may move from the bottom to the top of a cloud, from cloud to cloud, or most-feared, from cloud to ground (see Figure 3).
		The purpose of lightning protection is to reduce the damage to the boat and the possibility of injuries or death to the passengers from a lightning strike.
	www.cdc.gov /nasd/docs/d000001-d000100/d000007/d000007.html (2699 words)

	DETAKOM - Active Conductor (Site not responding. Last check: 2007-10-25)
		These lightning conductor are based on the principle of the spreading of electromagnetic waves.
		Lightning conductor consist of capturing end, ion generators, lightning conductor crown, electrodes, triggering circuit, grounding cable connector and the pole connector components.
		With the ions that are formed around the lightning conductor, the small tensions and the loads in the clouds close to the rod are conducted to the ground through the triggering circuit and the ion generator.
	www.detakom.com /english/active_conductor.htm (207 words)

	Lightning
		Ground-to-cloud lightning is a lightning discharge between the ground and a cumulonimbus cloud from an upward-moving leader stroke.
		Lightning was initially observed traveling up at around 50,000 m per second in a similar way to a typical blue jet, but then divided in two and speeded to 250,000 m / second to the ionosphere, where they spread out in a bright burst of light.
		A lightning conductor is a metal spike that is connected to earth by a low-resistance path.
	www.crystalinks.com /lightning.html (2912 words)

	Communications Technology: Archive
		Lightning rods (air terminals) 24 inches or higher may be placed at intervals not exceeding 25 feet.
		Down conductors should be as widely separated as practical, and no bend of a conductor shall form an included angle of less than 90°, nor shall it have a bend radius of less than 8 inches.
		Conductors must be fastened to the structure upon which they are placed at intervals not exceeding 3 feet.
	www.cableworld.com /ct2/archives/0299/ct0299h.htm (3271 words)

	LIGHTNING - Online Information article about LIGHTNING (Site not responding. Last check: 2007-10-25)
		sharp angles of a building in such a manner as to increase the chances of the lightning being diverted from the conductor.
		idea is that to secure the greatest protection a rod of the largest area should be erected, whereas a single large conductor is far inferior to a number of smaller ones and copper as a material is not so suitable for the purpose as iron.
		Causes of Failure.—A number of failures of conductors were noticed in the 1905 report of the Lightning Research Committee.
	encyclopedia.jrank.org /LEO_LOB/LIGHTNING.html (1758 words)

	Lightning & Boats
		The lightning protection system will therefore consist of a robust “primary path” which will be designed to safely conduct a direct strike to ground, and a series of “secondary paths” which will be designed to safely dissipate the accumulation of charge by the boat, and which will feed into the primary path.
		In other words, lightning that would, in the absence of the lightning rod, strike within the region bounded by the conical surface is supposed to instead strike the cone apex.
		It is critical that the primary conductor of the lightning protection system, which takes the path from the top-most end of the system to the water be as robust as it can be made, be as direct as possible, and use long radii, rather than sharp bends along the primary path to the grounding plate.
	www.kastenmarine.com /Lightning.htm (3099 words)

	Electric Power eTool: Glossary
		Grounding Equipment Conductor: The conductor used to connect the noncurrent-carrying metal parts of equipment, raceways, and other enclosures to the system grounded conductor, the grounding electrode conductor, or both, of the circuit at the service equipment or at the source of a separately derived system.
		Lightning Arresters: Lightning arresters are devices for protecting many different pieces of equipment such as, power poles and towers, power transformers, circuit breakers, bus structures, and steel superstructures, from damage from lightning strikes.
		Lines, Communication: The conductors and their supporting or containing structures which are used for public or private signal or communication service, and which operate at potentials not exceeding 400 volts to ground or 750 volts between any two points of the circuit, and the transmitted power of which does not exceed 150 watts.
	www.osha.gov /SLTC/etools/electric_power/glossary.html (11613 words)

	Lightning Rod Conference Bakken 2002
		Lightning was still an instrument of divine direction, philosophers claimed, as long as one accepted their re-definition of this direction as benevolent, lawful and predictable.
		Frequent lightning strikes during a particular year were thought to portend a good harvest, and in a ceremony seen throughout Japan, people used to place green bamboo stalks around fields that were struck by lightning, marking them as chosen targets of heavenly power.
		Although lightning rods had been around for nearly a century, they had just begun to change from a homemade device erected by knowledgeable farmers, mechanics, flsmiths, and others to a commodity made in a factory and sold and installed by salesmen or lightning rod companies.
	www.thebakken.org /research/lightning-rod-conference.htm (4106 words)

	Thunder Electronic Eng.Co. Technical Oage
		The lightning stroke begins the formation inside the storm cloud of a tracer which proceeds in hops toward the ground: this is the downward tracer.
		As the tracer from the clouds nears the ground, the ionization due to the corona effect continues to develop until its transformation in an upward tracer on striking structure or objects on the ground.
		Lightning arresters can be used without any lightning conductors on sites where direct strokes are very unlikely to happen.
	www.thunderelec.com /ETech.html (341 words)

	Electricity
		When a conductor was attached between these, the difference in the electrical potential (also known as voltage) drives a current between them through the conductor.
		The late 19th and early 20th century produced such giants of electrical engineering as Samuel Morse, inventor of the telegraph; Alexander Graham Bell, inventor of the telephone; Thomas Edison (inventor of the phonograph and a practical incandescent light bulb); George Westinghouse, inventor of the electric locomotive; Charles Steinmetz, inventor of alternating current.
		Nikola Tesla performed experiments with very high voltages that are the stuff of legend, involving ball lightning and other effects (some have been duplicated or explained; and others which have not).
	www.brainyencyclopedia.com /encyclopedia/e/el/electricity.html (1703 words)

	Marine Lightning Protection Inc.
		In the context of lightning and yachts, it would seem that a lightning protection system is a reasonable measure to take to insure the safety of all on board.
		Note that the mechanism for lightning attachment is unaffected by the material used in the hull and whether the mast(s) are grounded or not.
		However, if the lightning attachment point, for example a mast, is not connected to a grounding conductor in the water then a major sideflash may be more vertical than horizontal and carry a large proportion of the lightning current - several tens of kiloamps.
	www.marinelightning.com /FAQ.htm (2116 words)

	Static Electric Sparks and Lightning - Succeed in Physical Science (Site not responding. Last check: 2007-10-25)
		When a conductor—like a metal rod—is brought near a charged non-conductor, the free electrons in the conductor will move to one end or the other of the rod, depending on whether the non-conductor surface is positive or negative.
		When the conductor is brought into contact with the non-conductor, the electrical charges on the surface of the non-conductor are "sucked" into the conductor.
		Most lightning bolts are from cloud to cloud, but sometimes there are no positive charged clouds nearby, so the negative cloud, sends its electrons to the ground or any object that may have a slight positive charge.
	www.school-for-champions.com /science/staticspark.htm (1473 words)

	ipedia.com: Lightning rod Article (Site not responding. Last check: 2007-10-25)
		A lightning rod is a metal strip or rod, usually of copper or similar conductive material, used to protect tall or isolated structures from lightning damage.
		Franklin had speculated about lightning rods for several years before his reported kite experiment.
		Lightning rods were often embellished with non-functional glass balls (now prized by collectors) and incorporated into weather vanes.
	www.ipedia.com /lightning_rod.html (819 words)

	HELITA
		It is the world's manufacturer of early streamer emission lightning conductors, and sales are increasing annually by an average of 10 to 15%.
		From early streamer emission lightning conductors through earth plates and surge arresters to meshed cages, Hélita now offers a complete range of products and services, which meet the respective standards and requirements of the different countries in which its expertise has been recognized.
		When the lightning approaches the ground, a luminous ascending brush discharge is initiated at the lightning conductor.
	www.thunderelec.com /Helitaenglish.htm (778 words)

	Lightning Protection for Facilities - Gabrielson & Marcus - EMCEXPO92 (Site not responding. Last check: 2007-10-25)
		A lightning discharge, or flash, is initiated by an upward or downward traveling spark known as a step leader.
		If a ground rod cannot be driven due to bed rock near the surface, a conductor extending out from the building for at least 12 feet may be laid in a trench from one to three feet deep in clay soil.
		In the case of television (TV) antennas with 300 ohms twin lead, a 300 ohm twin lead lightning arrestor must be mounted on the mast and connected to the twin lead.
	www.blackmagic.com /ses/bruceg/EMC/litfacil.html (2240 words)

	Grounding an antenna
		At right the lightning conductor installed from factory at the base of the vertical antenna Fritzel GPA 404, making the junction between the antenna (at left) and the mast (at right).
		Worst a lightning conductor has nothing to do with a domestic grounding, as in the case of lightning we speak of HIGH frequencies.
		A lightning conductor is however useless if it is badly placed or if you cabling system is not disconnected both outside the house and inside, as you should do with all other cables during threat of thunderstorms.
	www.astrosurf.org /lombry/qsl-safety.htm (2397 words)

	When lightning strikes people
		Both industrial shocks and lightning strikes result in deep burns at point of contact - for industry the points of contact are usually on the upper limbs, hands and wrists, while for lightning they are mostly on the head, neck and shoulders.
		Both industrial shock and lightning victims may be injured from falling down or being thrown, and the leading cause of immediate death for both is cardiac or cardiopulmonary arrest.
		Lightning burns are exceptionally life threatening (see box at the end of this story).
	science.nasa.gov /newhome/headlines/essd18jun99_1.htm (1882 words)

	Severe Weather Precautions - Lightning
		Lightning occurs with every thunderstorm and must be expected as soon as thunderstorms form.
		Lightning results from the build-up and discharge of electrical energy between positively and negatively charged areas in the atmosphere and clouds.
		The most lightning occurs between clouds but it is the ground strikes that are dangerous.
	www.weathersa.co.za /Education/PrecLightning.jsp (195 words)

	Lightning misses the point - for printer (Site not responding. Last check: 2007-10-25)
		Common wisdom says that the best lightning conductor is a sharp one: a needle-like rod attached to the rooftop.
		Legend has it that Benjamin Franklin established the electrical nature of lightning by flying a kite in a thunderstorm, with a metal key attached to attract a strike.
		The researchers conclude: "Franklin's method for providing [lightning] protection has been made less effective than it could be, by his urging that the tip of lightning rods be sharpened." Sometimes, in other words, it is wise to question tradition.
	www.nature.com /nsu_new/nsu_pf/000518/000518-5.html (533 words)

	lightning conductor
		Device that protects a tall building from lightning strike, by providing an easier path for current to flow to earth than through the building.
		A good connection to the ground is essential and is made by burying a large metal plate deep in the damp earth.
		In the event of a direct lightning strike, the current in the conductor may be so great as to melt or even vaporize the metal, but the damage to the building will nevertheless be limited.
	www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0030305.html (173 words)

	DETAKOM - Lightning Conductor (Site not responding. Last check: 2007-10-25)
		In our day where the technology advances with lightning speed, several damages are encountered as lightning conductor are not used and good grounding is not made.
		Lightning is a natural disaster, which can be rendered ineffective in case preventive measures are taken in advance.
		Plans being made and implemented before the constructions of premises and buildings are completed would be much easier and cheaper.
	www.detakom.com /english/lightning_conductor.htm (64 words)

Try your search on: Qwika (all wikis)