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Topic: Overhead powerline

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	Overhead powerline - Biocrawler (Site not responding. Last check: 2007-10-20)
		The powerlines are suspended from insulators on pylons.
		Overhead lines or overhead wires are used to transmit electrical energy to trams, trolleybuses or trains at a distance from the energy supply point.
		Overhead line is designed on the principle of one or more overhead wires situated over rail tracks, raised to a high electrical potential by connection to feeder stations at regular intervals.
	www.biocrawler.com /encyclopedia/Overhead_powerline (1012 words)

	elecases
		Electric current flowed from the powerline to a section of wire reinforcement carried by a co-worker to the scaffold to victim to ground.
		Victim's firm working at a pit directly under powerline positioning a boring machine that was to drill under a road.
		Attempting to untangle the hoist chain of an overhead crane that was caught on an I-beam.
	www.cdc.gov /niosh/elecases.html (5879 words)

	Overhead line crossing - Wikipedia, the free encyclopedia
		Thus, at overhead line crossings at which the overhead line runs above the rope of the aerial tramway, two catch ropes are occasionally installed to prevent the conductor from falling off the rope of the tramway in case a pylon or insulator were to break.
		Overhead line crossings of broad rivers and of straits, if the terrain on both sides is relatively even, frequently consist of four pylons: two particularly substantial anchor pylons for bracing the conductors of the crossing section, and two tall carrying masts to keep the line high over the water.
		The overhead line crossing the Strait of Messina — which, with a span of 3646 meters, was one of the longest overhead line crossings in the world, with 200-meter pylons among the highest in the world — was replaced by a submarine cable, because of its small maximum transmittable electrical power.
	en.wikipedia.org /wiki/Overhead_line_crossing (1527 words)

	Overhead powerline - Wikipedia, the free encyclopedia
		Since most of the insulation is provided by air, overhead powerlines are generally the lowest-cost method of transmission for large quantities of electric power.
		The area under an overhead line can be used for most purposes, at which the danger does not exist that objects connected with the ground come into the proximity of the conductor cables or at which can be the danger that the conductor cables, insulators or mast constructions are damaged.
		In 1982 overhead powerlines were built in Russia between Elektrostal and the power station at Ekibastusz, this was a three-phase alternating current line at 1200 kV (Powerline Ekibastuz-Kokshetau).
	en.wikipedia.org /wiki/Overhead_powerline (2168 words)

	powerline.html
		Though overhead power lines are less expensive than underground lines, city ordinances prohibit stretching overhead line through the park, so that although the shortest distance runs directly from point A to point B you may not assume that this gives the cheapest line.
		You plan to run overhead line a distance x along the south side of the park from point B to point C, then use underground line directly from point C to point A at the southeast corner of the park.
		Suppose the low bid for purchase and installation of the overhead line is 90 thousand dollars per mile, not much less per mile than the cost of the underground line, which is 100 thousand dollars per mile.
	www.math.uga.edu /calclab/calclab2200/powerline1.html (944 words)

	SRP: Working near overhead power lines
		Overhead power lines that appear to be insulated may not protect you from electric shock.
		The Arizona Legislature enacted the Overhead Powerline Safety Law to make working near overhead power lines safer.
		Although overhead power lines may appear to be insulated, often these coverings are intended only to protect metal wires from weather conditions and may not protect you from electric shock.
	www.srpnet.com /safety/overhead.aspx (510 words)

	FACE 91-20
		The single-phase de-energized powerline had been previously offset away from the energized powerlines by mounting an additional section of crossarm to the permanent crossarm on the utility pole, and attaching the de-energized powerline to an insulator on its end.
		The trucks were parked close to the utility pole, and beneath the overhead powerlines (Figure).
		When the powerline was dropped from the bucket truck, the come-along and powerline contacted the winch attached to the front of the pickup truck.
	www.cdc.gov /NIOSH/face/In-house/full9120.htm (1891 words)

	Dangers of Powerlines when Pumping Concrete (Site not responding. Last check: 2007-10-20)
		When close to overhead powerlines, a small movement of the powerline or plant can cause contact and electrify the surrounding area on the ground.
		Whenever there is contact with a powerline, so-called ‘voltage rings’ form under and around the unit and there may be hazardous voltages on the ground.
		When working near overhead powerlines it is recommended that the power be switched off by the local electricity supply authority.
	workcover.nsw.gov.au /Publications/Industry/Electrical/powerlines.htm (330 words)

	Powerline Hazards (Site not responding. Last check: 2007-10-20)
		Powerlines at launch ramps are especially hazardous to boaters.
		Boats have also been known to strike powerlines simply because their operators didn't have up-to-date charts or didn't know how far it was from the boat's waterlines to the mastheads.
		Usually, powerlines that span bodies of water have the minimum clearance between their lowest point and the highest waterline mark indicated on charts or signs at the approach to them.
	www.uscgboating.org /safety/metlife/powerline.htm (661 words)

	Dangers of Powerlines when Pumping Concrete (Site not responding. Last check: 2007-10-20)
		When close to overhead powerlines, a small movement of the powerline or plant can cause contact and electrify the surrounding area on the ground.
		Contact with a powerline is dangerous for everyone connected to or close to the machine.
		When working near overhead powerlines it is recommended that the power be switched off by the local electricity supply authority.
	www.workcover.nsw.gov.au /Publications/Industry/Electrical/powerlines.htm (330 words)

	Hanbook
		A deed or proof of ownership of all properties that the powerline encroaches upon.
		Overhead primary powerline, twenty(20’) feet (10’ either side of powerline).
		Overhead secondary powerline, ten (10’) feet (5’ either side of powerline).
	www.srec.org /annual/hanbook.htm (5950 words)

	OPGW - Optical Ground Wire / OPGW - Optical Ground Wires: Wiretec
		Overhead conductors are subjected to high electrical and mechanical stress in operation.
		Vibration tests: Overhead conductors can be excited by laminar flows to high-frequency vibrations which destroy the ropes, depending on duration and intensity.
		Vibration test benches are used to determine the self-behaviour of the ropes and establish the type and position of the vibration dampers.
	wiretec.eu /epconopgw_optical_ground_wire.htm (437 words)

	TXU - News Release
		Mr Peter Magarry, General Manager TXU Networks, said that regular audits and inspections had been conducted on more than 90,000 poles and overhead powerlines throughout the year to ensure that all maintenance work on the distribution network was completed.
		Tree branches clashing with powerlines can start a bushfire and are one of the most common causes for interruptions to electricity supply.
		âApproximately 48,000 spans of our overhead powerline system were cleared to ensure the tree clearance from overhead wires for fire safety was achieved prior to the start of the fire season,â he said.
	www.txucorp.com /media/newsrel/detail.aspx?prid=644 (367 words)

	Electrocution
		Never store material or equipment under overhead powerlines if current is more than 750 volts and cranes or similar lifting devices will be involved.
		Remember that overhead lines can be struck not only by booms and ladders but also by long pieces of material being lifted by hand, such as pipe and siding.
		Although aware of nearby powerlines, they failed to allow for the length or bulkiness of their material.
	www.csao.org /uploadfiles/magazine/vol11no1/shock.htm (1284 words)

	Trentham Environmental Action Campaign
		You may be aware of the growing concern of the adverse health effects of exposure to elevated levels of electric and magnet fields (EMFs) especially from those associated with overhead powerlines.
		We as an Action Group are committed to the struggle to force moves to reduce or remove the health threat of powerline emissions, as graphically summarised in the California Health Department Report, as well as the important information emerging from the international scientific community generally.
		Approximately 300,000 people in the UK live in properties that are affected by powerline emissions that exceed 0.4 microtesla - a figure at which the NRPB admits to a doubling of childhood Leukaemia risk.
	www.revolt.co.uk /trentham/allmin2.html (766 words)

	CARROLL ELECTRIC COOPERATIVE CORPORATION v. Joe BENSON and A...
		On remand, the chancellor concluded the overhead power line in its present location was not reasonable and directed the power line be placed underground.
		In 1967, inaccordance with this right-of-way easement, Carroll Electric constructed an overhead electric line into the center of the Bensons' property to serve the residence now owned by the Bensons.
		Appellant Carroll Electric contends this Court remanded the case solely for a "determination of the reasonableness of the route chosen for the line." Consequently, Carroll Electric submits the trial court erred when it balanced the equities between the parties and ruled on the rights of the Bensons to delimit the easement.
	courts.state.ar.us /opinions/old/94-593A.html (1514 words)

	ohio power powerline
		The purpose of the powerline is to provide electricity to private property surrounded by federal land.
		The powerline will require three poles that will crisscross the road to minimize the removal and limbing of trees along the right-of-way.
		Underground placement of the powerline would be two to three times the cost of the proposed overhead powerline.
	www.fs.fed.us /r9/wayne/projects/ea_docs/dm_dn/ohio_power_powerline.html (809 words)

	MSU Occupational & Environmental Medicine
		35-year old electrician was killed while changing lights in an overhead traffic signal when the boom supporting the vehicle-mounted aerial work platform he was working from was struck by a semi-truck.
		23-year old male paper production makes was killed when his head was caught between a low hanging overhead water pipe and the fork-mast of a forklift that did not have overhead guard protection.
		41-year old self-employed male was electrocuted when he touched a truck door that was energized due to the truck's crane contacting an energized 7600-volt overhead powerline.
	oem.msu.edu /miosha.asp (2269 words)

	Docket No. 88-2912-S
		Marse stated that none of the laborers was paying attention to the crane's distance from the powerline because "[i]t was 2:00 in the day and we were fixing to get off work in about another hour." Marse, Tatum, and Shoemaker had never received training concerning the operation of cranes around powerlines.
		While the employees were unloading the second load of pipe, the truck crane's cable became energized by the overhead powerline.
		Elveston testified that the truck crane's boom was fully extended and on the ground parallel to the powerline, with "fresh burn marks" on the wire rope approximately one foot below the boom at the end of the crane.
	www.oshrc.gov /decisions/html_1992/88-2912.html (6440 words)

	Safety Alert - WARNING ON TREE CLEARING NEAR OVERHEAD POWERLINES (Site not responding. Last check: 2007-10-20)
		The restatement of the warning follows another fatal accident where a man was electrocuted and another person injured when a cut branch was being removed from a bare overhead powerline.
		If you are concerned about the proximity of trees to powerlines and you are unsure who is responsible for pruning the trees in question, check with your distribution company or local council;
		Only authorised powerline pruning contractors should prune trees touching or in close proximity of powerlines.
	www.ocei.vic.gov.au /alerts/sa1.html (310 words)

	Exercise Equipment - PowerLine Power Rack
		The PowerLine Power Rack allows you to build significant muscle mass while training alone, with complete safety, and is best used in conjunction with my MuscleNOW bodybuilding program (which teaches you exactly how to train and eat for muscle building).
		I have always found gyms to be distracting, and training partners in my own personal experience provide more reasons for idle chatter and wasted time than actual muscle building motivation, therefore I have always preferred to train at home, alone.
		The Power Rack is likely the greatest bodybuilding equipment invention of all time, especially for those who do not wish to join a gym, nor are interested in training with a partner.
	www.incredibody.com /powerlinepowerrack.html (453 words)

	Moynahan & Minnella
		As he was attempting to detach the pipe from the bucket of a CAT 235 excavator, which had lowered the pipe into the trench, he suffered the electrocution injury.
		This tragedy occurred because, unknown to both the operator of the excavator and John, the arm of the excavator had come into contact with an activated high-tension overhead powerline prior to lowering the pipe into the trench.
		When John attempted to disconnect the pipe from the bucket at the end of the arm of the excavator, 4800 volts of electricity entered into his left wrist, passed through his left arm and his chest cavity into his right leg and exited out of his lower right calf.
	www.moynahanlawfirm.com /case/electrolaw.shtml (338 words)

	The Telluride Watch (Site not responding. Last check: 2007-10-20)
		The entire basis of upgrading the current 69 kV line between Nucla and Telluride is at the line is that the end of its useful life, and thus poses a risk to public safety.
		Thus, if the powerline brought greater benefits to Tri-State, the county reasoned, then those benefits would affect the calculation of what is a reasonable or unreasonable mitigation requirement.
		In Wednesday’s order the PUC found the requirement was not unreasonable and that it did not unreasonably impair Tri-State from delivering “safe, reliable, and economic service to the public,” the standards stated in the 2001 statute.
	www.telluridewatch.com /archive_news/010904/story1.htm (1222 words)

	Overhead lines - Wikipedia, the free encyclopedia
		overhead wire at about 500 to 750 V above earth, while trolleybuses draw their power from two overhead wires (powered at similar voltage).
		Because of that, at least one of the trolleybus wires must be insulated from tram wires.
		In Athens there are two crossings between overhead tram and trolleybus wires.
	en.wikipedia.org /wiki/Overhead_lines (2841 words)

	Messina - Sicilia - Italy
		Famous citizens of Messina were Antonello da Messina, Italian painter and genius of the Renaissance, born in 1430 and Filippo Juvara (Juvarra), Italian architect highest exponent of Baroque, was born in Messina in 1678.
		In 1957 a 220kV-overhead powerline was built across the strait of Messina.
		This powerline has since been replaced by an underwater cable, but the pylons still remain, protected as historical monuments.
	www.italyworldclub.com /sicilia/messina/messina.htm (299 words)

	Caltrain Electrification Q&A
		The main disadvantage is the huge safety problem: while overhead electric wires are safety out of harm's way, a 600 to 1000 volt energized rail at ground level is a major safety hazard.
		Overhead wire is that choice for all new railroad electrification projects around the world, with the exception of some subway systems.
		The most modern and efficient railroads in the world, including the bullet trains of Japan and the TGV trains of France, all run underneath overhead wires whose basic design, if not their sophisticated engineering, would be familiar to an engineer from the 1920s.
	www.sonic.net /~mly/Caltrain-Electrification/electrification-qa.html (1938 words)

	City of Ashland, Oregon - Oneida Circle (Site not responding. Last check: 2007-10-20)
		It is recommended that the City Council adopt a motion to sign the attached quitclaim deed terminating the City's interest in the powerline easement recorded as Volume 524, page 462 (March 8, 1962).
		The above ground powerline and supporting poles were removed when the powerlines were relocated and converted to underground service.
		The 20 foot wide overhead powerline easement which was acquired by Pacific Power and Electric from Karl Windbigler is no longer in use but is still a legal easement encumbering the lot at 997 Oneida Circle (391E15CA-128).
	www.ashland.or.us /Page.asp?NavID=1716 (278 words)

	Mine Safety and Health Administration (MSHA) - Accident Prevention Program Safety Ideas - Overhead Powerline Hazards
		Problem: Overhead high-voltage conductors or "lines" are usually bare wires supported by poles or structures, traversing across mine property.
		A risk of danger exists for personnel when mobile equipment, such as trucks, drill rigs, cranes, etc. contact these lines.
		Based on accident data recorded by MSHA from 1980 to 1997, there have been 106 accidents involving overhead lines.
	www.msha.gov /Accident_Prevention/ideas/wire.htm (286 words)

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