View Full Version : pulling transmission wire
cttransmission
10-06-2010, 04:46 PM
does anyone pull wire that uses pullers and tensioners that do not have a platform to stand on use a rubber grounding mat with a wire mesh for the purpose of grounding (being at the same potential) and if so do you have the wire mesh facing up to stand on or facing the ground?
Trbl639
10-06-2010, 05:43 PM
Never pulled wire on transmission, but on Distribution if the puller, tensioner didn't have a seat or platform, we stood on a rubber blanket...........that was before the equal-potential blankets.
Never used one, but it would seem to make since, that the wire mesh side would/should be down, to be in contact with the earth/ground..........
Maybe another hand here that has used them will chime in....
All of our pullers also have seats, but I think you want the mesh up, the mesh is to create an equal potential zone, not to clear the line, that is what your travelling ground, your ground at the first & last pole, every 5th pole & where ever else they are needed. You should also be using properly grounded travelers that come with a ground stud from the manufacturer not home made. I also have never pulled wire on transmission.
Trbl639
10-06-2010, 08:01 PM
Never used the epz matt..so I didn't know........Thanks Lewy
pre_apprentice_ID
10-06-2010, 11:05 PM
Call the company that makes it and ask.
Highplains Drifter
10-06-2010, 11:41 PM
Call the company that makes it and ask.
Good point Kid!!!!http://www.irv2.com/forums/images/smilies/thumb.gif And most employers have a standard on how they want things placed.....My self the mesh down....
Good point Kid!!!!http://www.irv2.com/forums/images/smilies/thumb.gif And most employers have a standard on how they want things placed.....My self the mesh down....
What is your reason for wanting the mesh down?
We had a tension stringing course & the question was brought up & the answer was mesh up. After all you want everything on your mat at the same potential in the event of accidental energization, that is why you bond your machine & your mat & your travelling ground as well as the end of the cable on your real to the system neutral (if you have one or to a properly meggerd ground rod) to keep every thing at the same potential not necessarily zero.
BookII
10-10-2010, 06:20 AM
If you're using an EPZ mat you want the wire mesh facing up. That way you're at the same potential with your equipment. And you want the mat tied in with a ground as well as the equipment. AB Chance also recommends using a step potential mat when transfering onto the EPZ mat. Baascially it's just a rubber mat.
cttransmission
10-13-2010, 06:50 PM
thank you all for your input it was helpful i did contact the maker of the equi mat and they said it does not matter what side you stand on they also sent me a link with the instructions i have added below:
http://www.hubbellpowersystems.com/resources/instructions/P600-2840.pdf
unionhand
10-14-2010, 12:16 AM
mesh up. and it dosent matter transmission or distro. pulled wire on both. just if you have to operate the brakes while standing on the ground is the reason for the mat. that type wire boat can be used anywhere.
work safe brothers
neil macgregor
10-30-2010, 04:28 PM
earth the winch with an earth spike
earth the winch with an earth spike
Do you also use an equal potential mat & connect to the system neutral (if you have 1)?
CPOPE
10-30-2010, 07:10 PM
Do you also use an equal potential mat & connect to the system neutral (if you have 1)?
You should put a pole band up and bond to all metallic messengers on the pole. All neutral messengers electric and communication are down grounded and bonded together a minimum 4 times per mile by NESC national electrical safety code requirement....NEC national electrical code requires down grounding and this same bonding at each service........
The more multiple hard wire redundant returns the lower neutral resistance. More than 4 driven ground rods are better. Bond together messengers and drive grounds every pole you work. More the better .....Lowers neut return resistance and circuits trip out quicker on ground fault....
It gets confusing cause poor ground in delta areas with no neutrals or SWER single wire earth return systems forces you to rely only on earth driven grounds.....
Stay Safe
neil macgregor
10-31-2010, 06:00 AM
Do you also use an equal potential mat & connect to the system neutral (if you have 1)?
no just the earth spike on its own with a copper earth
no just the earth spike on its own with a copper earth
How do you deal with potential step & touch potentials in the event of an accidental energizaton?
old lineman
10-31-2010, 11:59 AM
no just the earth spike on its own with a copper earth
In my opinion unless your following the guidelines that Lewy has explained re: equipotental zone you are vulnerable to bridging from one potential to another.
eg; Energized tensioner to earth, a deadly combination.
The whole unit should be sitting on a grid that has been earthed and bonded to every metallic object sitting on the grid.
The conductor is bonded via a running ground. There also should be a dielectric enterance so the step potential situations are eliminated.
With this setup the whole area could become energized at full potential and the workers within the EPZ would not be harmed. Like a digger operator standing on his platform or sitting on his operators seat.
The Old Lineman
old lineman
10-31-2010, 08:10 PM
Do you people even know what your talking about. A highline wire trailer and semi is 55' long The tensioner depending on type could either be a semi or at least 3 to 4 axle truck. The puller at least 5 axles or more semi. Stick your ground mat . You don't have a clue.
You ground your equipment rolling grounds keep everybody else off the equipment and wire. When the wire gets in you ground the wire to sleeve and let up. You control your wiry heights at all times using winch's and radios to keep it out of anything below and use guard poles and cover with needed. This isn't fuking rocket science. We had more people killed through stupidity from induction falls, helicopter crashes, hit from falling objects. If you don't understand highlines stay home.
PUt a ground mat under this twice a day
What a jerk you are!
I've worked on plenty of stringing jobs. We used Pengo pullers.
Transmission isn't the same as distribution because of clearances and numerous traversing circuits. But hey you wouldn't be able to figure that out with your limited experience.
Leave this discussion alone.
The old Lineman
I have never worked transmission & likely never will, so I do not comment on transmission topics, but any time on distribution where you have a chance of getting into something I believe you should be creating an EPZ.
Do you people even know what your talking about. A highline wire trailer and semi is 55' long The tensioner depending on type could either be a semi or at least 3 to 4 axle truck. The puller at least 5 axles or more semi. Stick your ground mat . You don't have a clue.
You ground your equipment rolling grounds keep everybody else off the equipment and wire. When the wire gets in you ground the wire to sleeve and let up. You control your wiry heights at all times using winch's and radios to keep it out of anything below and use guard poles and cover with needed. This isn't fuking rocket science. We had more people killed through stupidity from induction falls, helicopter crashes, hit from falling objects. If you don't understand highlines stay home.
PUt a ground mat under this twice a day
good stuff here bats.... looks like the old rig we had when I worked for Meyers.... bout the only time we had a "mat" was when we rolled out some old al fenceing and parked the rigs on it...
and then it wont for safety it was to keep our dicks from being knocked in the dirt moving between trucks.... we talked about this awile ago..."ergonomics"
big sifference between 2295 or 3.5 or 4 mill in bundles and 477 or 795 single run
for what it's worth
Edge
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