Scared of Electricity Hights and Women. "High Votage"

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iwire said:
I nominate you as the head of the commission charged with studying specifically how many times it has been posted and at the end of the study we can publicly flog zog for exaggerating. :p
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Poor zog:lol::lol:
 
zog said:
Flog Zog, thats funny.

It is a cool video though, I used to show it to my students back in my teaching days.
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I may have seen it before but found it interesting how he ground the helocopter to the High voltage lines with the stick he was using.
 
T.M.Haja Sahib said:
Actually,the live high voltage lines have residual charges on them so that when the ungrounded electrician touches them with his bare hands,he may receive a shock.To prevent this he touches the lines with his wand to distribute the charges equally.
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A residule charge is what you could have after a line is shut down. The lines in the video are not shut down.
 
iwire said:
A residule charge is what you could have after a line is shut down. The lines in the video are not shut down.
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The live high voltage transmission lines also have a charge on them.Guess why.........
 
True enough, if there were an actual connection to earth and a worker on an ungrounded transmission line the video would not be available on YOU TUBE.

But then, while grounding and bonding mean different things to linemen and electricians in one sense, in another they mean the same- 0V potential.
 
ActionDave said:
But then, while grounding and bonding mean different things to linemen and electricians in one sense, in another they mean the same- 0V potential.
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I disagree that both bonding and grounding mean or result in 0V potential.

Consider the often posted graphic of a pole that is clearly grounded but is giving a lethal shock to a person.
 
iwire said:
That would be bonding, grounding is a connection to earth.
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I spent a few months doing high Voltage work in the early 1990's and what the guy in the video was doing they refer to it as grounding.

I understand that we use different terminology in our part of the Electrical trade.:)


PERSONAL PROTECTIVE GROUNDING FOR ELECTRIC POWER FACILITIES
AND POWER LINES

http://www.usbr.gov/power/data/fist/fist5_1/vol5_1a.pdf

Page 2 of 81 July 2005
FIST 5-1
PERSONAL PROTECTIVE GROUNDING FOR ELECTRIC POWER FACILITIES
AND POWER LINES
2. DEFINITIONS AND INTERPRETATIONS
Exposure voltage. A short-duration difference in potential between conductive
objects that a person may contact when personal protective grounds or a grounding
system conduct fault current. Also applicable to transferred potential between
separately grounded systems (stations), or difference in earth surface potentials.
Grounding (ground). The connection of conductive parts of lines, structures, and
equipment to earth or other conductive medium (grounding system) that substitutes
for earth, e.g. station ground mat conductors.
Grounded worksite. A work area that is made an equipotential safe working zone
by the application of personal protective grounds.
Personal protective grounding (grounds). Cable connected to de-energized lines
and equipment by jumpering and bonding with appropriate clamps, to limit the
voltage difference between accessible points at a worksite to safe values if the lines
or equipment are accidentally re-energized. Protective grounds are sized to carry the
maximum available fault current at the worksite. Also called ground jumper.
Static ground. Any grounding cable or bonding jumper (including clamps) that has
an ampacity less than the maximum available fault current at the worksite, or is
smaller than #2 A.W.G. (American Wire Gage) copper equivalent. Static grounds
are used for potential equalizing between conductive parts in grounding
configurations that cannot subject them to significant current. Therefore, smaller
wire which provides adequate mechanical strength is sufficient (e.g. #12 A.W.G.).
Station. For protective grounding purposes, any electrical facility with a grounding
electrode system (ground mat) which bonds all conductive, non-current carrying
parts of equipment and for the control of surface potential gradients. Two or more
distinct but adjacent facility grounding electrode systems that are intentionally
bonded (e.g. a powerplant and adjacent switchyard grounding systems) may be
considered a common station grounding system. Grounding systems that are
intentionally bonded but not physically adjacent are considered separately grounded.
Step voltage. The difference in surface potential experienced by a person bridging a
distance of one meter with the feet without contacting any other grounded object. [5]
Touch voltage. The difference in potential between a grounded structure or station
and the surface potential at the point where a person is standing while at the same
time having a hand in contact with the grounded structure or object. [5]
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ActionDave said:
True enough, if there were an actual connection to earth and a worker on an ungrounded transmission line the video would not be available on YOU TUBE.

But then, while grounding and bonding mean different things to linemen and electricians in one sense, in another they mean the same- 0V potential.
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We use the term "equipotential grounding" or creating a zone of equilized potential.
 
petersonra said:
Pretty impressive flying keeping the helicopter close enough not to tear away the bonding conductor.
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I often do corona surveys of HV lines from a helicopter, the pilot (Kevin) scares the crap out of me sometimes but he sure is good at flying that thing.
 
iwire said:
I disagree that both bonding and grounding mean or result in 0V potential.
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Strange, you are usually such an agreeable guy.

Consider the often posted graphic of a pole that is clearly grounded but is giving a lethal shock to a person.
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It has nothing to do with what intentionally grounding a conductor does.
 
LEO2854 said:
I spent a few months doing high Voltage work in the early 1990's and what the guy in the video was doing they refer to it as grounding.

I understand that we use different terminology in our part of the Electrical trade.:)


PERSONAL PROTECTIVE GROUNDING FOR ELECTRIC POWER FACILITIES
AND POWER LINES

http://www.usbr.gov/power/data/fist/fist5_1/vol5_1a.pdf
Click to expand...

What you posted has nothing at all to do with the activities in the video. What you posted has to do with working on dead lines, not live lines.
 
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