Tool Talk
What's-It Forum => What's-It Forum => Topic started by: HeelSpur on June 15, 2014, 06:17:55 PM
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This is all brass and looks like its missing a piece on the screw end, like on a c-clamp.
I was thinking something to do with welding.
(http://i1082.photobucket.com/albums/j368/wvabe/001-46.jpg)
(http://i1082.photobucket.com/albums/j368/wvabe/003-41.jpg)
(http://i1082.photobucket.com/albums/j368/wvabe/002-51.jpg)
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Its an equipment riser clamp for attaching equipment to an upright rod. Think chemistry bottles etc.
I think it is only the riser side. Another clamp sits in the groove and fits in the hole(s). The 2nd half could be a burette clamp, a right angle clamp, etc.
Nevermind that guess was in the 15% (min) of when I am wrong.
Thanks Phil!
Chilly
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Sorry Chili.
It's most of a hotstick clamp used to connect a tap to the Primary wire on an electric pole line.
The bolt that holds the tap wire to the clamp is missing.
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Watched a video a few years ago - in the Balkans somewhere - chap had two long wooden poles with a couple of leads attached, with hooks - on the other end of the leads was an electric saw bench - he found a bit of woods with over head power lines, hooked on his leads and proceeded to cut up his firewood...
That was potentially a real 'hotstick'......
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In various third world countries, farmers die monthly hooking electric fences up to high tension wires.
The electricity thing people get, the voltage thing not so much...
Ditto Aunt Phil, looks like something that fell off a utility truck...
(Rusty has a really neat pair of ratcheting cable cutters that were left behind by the nice folks at con ed :)
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Is it steel or copper / brass?
( You sold me Phil, just curious niw.)
Chilly
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Volts jolt - Mills kill (miil = milliamps) - it is the current that kills, although generally you need a high voltage to 'push' that current through the human body...
In the UK mains voltage is 220/240v - that kills OK - for industrial or site use we use 110/120 transformers with a centre tap to earth, so potential to earth is only 55/60v - that's painfull but not lethal...
Car ignition sytstems using a coil produce high voltage (kV) very low current - they kick like hell, but my dad used to check plug leads by holding the plug cap when the engine was running.... Modern electronic ignitions tend to be higher voltage AND current.....
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Is it steel or copper / brass? ( You sold me Phil, just curious niw.) Chilly
HillSpur stated 'all brass'
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Is it steel or copper / brass? ( You sold me Phil, just curious niw.) Chilly
HillSpur stated 'all brass'
TY
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YW
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>Volts jolt - Mills kill (miil = milliamps) - it is the current that kills
At the utility level tho, it is more about raw energy. The human mind just doesn't get the kind
of energy available from a high voltage utility wire. There is no conceptual reference for MegaWattSecond,
We have trouble dealing with energy levels where solid , thick , heavy pieces of metal vanish without a trace, and an arc results in an explosion like dynamite going off....
Keeping the cows in the fence is good, barbecuing the entire cow in 3 seconds, not so good..
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>Volts jolt - Mills kill (miil = milliamps) - it is the current that kills
At the utility level tho, it is more about raw energy. The human mind just doesn't get the kind
of energy available from a high voltage utility wire. There is no conceptual reference for MegaWattSecond,
We have trouble dealing with energy levels where solid , thick , heavy pieces of metal vanish without a trace, and an arc results in an explosion like dynamite going off....
Keeping the cows in the fence is good, barbecuing the entire cow in 3 seconds, not so good..
Our son-in-law's license is as electrician (contractor level) although he now works as sales / repair for commercial scale grain handling equipment. Anyhow, early in employment our son-in-law was standing by as his boss (also electrician) was working on a 440 / 480 panel when something arced. The boss was off work for several months regrowing the skin that had vaporized from that flash - luckily his sight was not damaged.
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Agreed, we cannot be complacent about the power high voltage mains systems have to maim or kill - in the UK domestic voltage is 220/240 for single phase, 380/440 for three phase... The power to our place is supplied via a 3kV line and a stepdown transformer. That 3kV line has enough power to fry a body in seconds (probably milliseconds). To undertake tree surgey work under the line to remove trees that may touch the conductors, the line has to be shut down....
High voltage distribution lines run as high as 400kV (330kV, 275kV, 220kV, 132kV, 110kV and 66kV are also common) - 765kV, 500kV, 345kV, 230kV, 138kV, 115kV and 69kV are the common voltages used in the USA... The mind boggles at the shear amount of power that can be running through one of the HV supply lines...
I watched a crazy TV programme a while ago, a chap hanging out of a helicopter with a high pressure hose, washing the glass insulators on a HV line whil the line was hot...
Just found it on Youtube: https://www.youtube.com/watch?v=IcvZAUdNSKM
and when it all goes wrong.... https://www.youtube.com/watch?v=yX5TIDLvMyw
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Hmm... Well, the smaller of the two holes appears to have had another part in it at one point, judging by the slight wear on the side in the first picture, and the v-grooves on the opposing side.
I would guess, that it is some sort of grounding clamp. I think the missing part, would have been an electrical 'u-bolt' that held the ground wire in the two V grooves. While the large thumb screw would tighten against a grounding rod or some sort....
I have nothing to back up this guess :P Just sort of what it looks like to me!
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The eye bolt says it's a temporary use - best guess it is used to ground a power cable (as per previous post) while the line is being worked on for safety of workers in case line is switched on accidentaly, or lightning strike further up the line...
see: https://www.dehn-international.com/en/990/53901/Familie-html/53901/Earth%20Connecting%20Elements%20for%20Switchgear%20and%20Overhead%20Lines%20.html for current models
and here's another model by the same company, but with an insulated handle...
(http://www.dehn-usa.com/pdbRes/DE_EN_Web-UK/1675/57266/previewImg/554399/745602.jpg)
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Here is one with the missing bolt - generic internet pic:
(http://i880.photobucket.com/albums/ac6/chillylulu/Tools%20Sized/_57%202_zpscv5xbtts.jpg) (http://s880.photobucket.com/user/chillylulu/media/Tools%20Sized/_57%202_zpscv5xbtts.jpg.html)
Other side is a washer and nut on the threaded end.
Chilly
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So, is the part at the top, fitted into the hole and slot in the body, an alternate "foot" for the screw? That's what it resembles.
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So, is the part at the top, fitted into the hole and slot in the body, an alternate "foot" for the screw? That's what it resembles.
My swag is that a lead is bolted to the other side and this tab holds back when tightening the nut? My only guess is the end is different from a carriage bolt or that ilk is to keep a user from attaching a common bolt..?..
Here is a different view:
(http://i880.photobucket.com/albums/ac6/chillylulu/Tools%20Sized/_1_zpsxzsxcxwi.jpg) (http://s880.photobucket.com/user/chillylulu/media/Tools%20Sized/_1_zpsxzsxcxwi.jpg.html)
Chilly
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First, it's bronze not brass.
Second 2 parts are missing, the tap bolt & the shoe that rides the end of the screw.
The tap wire of whatever length necessary is secured to the clamp and transformer or another clamp in the case of jumpers.
After that you keep yer damn hands off the device unless you have 2 feet on the ground.
Hotstick goes in the hole of the clamp body to swing the clamp into place hanging on a primary. Stick is pulled from that hole and indexed into the loop of the screw and the screw is tightened. Connection is made and stays made for years.
These were very common in the time of 4160 volt primary when a 3 foot wood stick was considered safe. They are still used but stick technology has changed considerably.
Billman the clamp you pictured is a bus bar tap. With the screwdriver handle it is most likely to be used on one end of a set of personal safety grounds to provide protection in a switching cabinet.
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>when a 3 foot wood stick was considered safe
-flashback-
Varnished wood workbench
12KVDC laser power supply
Things standing up on the benchtop all by themselves
Things moving around on the bench all by themselves
Little blue lightning balls crawling around on the bench
Power switch behind the bench...
-panic-
-run like hell-
Find circuit breaker in electric panel for workshop.....
Go have a coffee....
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You forgot the part about holding your gloved left hand in front of your face in case the beach flashed.
There is no sound similar to a 1 1/2 amp fuse blowing on 4160 especially when you're the man on the end of the stick closing the fuseholder.
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When I was young the substation near my house popped one day.
The crew showed up and tried to close main breaker on the highlines into apparently a dead short. The sky lit up bright green for several seconds.
Like broad daylight. I was 2 miles away..
I always wondered if the poor schmuck who closed the breaker had to go home and change...