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#126088 - 03/20/03 01:03 AM 15 KV Cables People Had to Walk Over?
Joe Tedesco Offline
Member

Registered: 10/07/00
Posts: 3325
Loc: Boston, Massachusetts USA


[This message has been edited by Joe Tedesco (edited 09-10-2003).]
_________________________
Joe Tedesco, NEC Consultant

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#126089 - 03/20/03 12:56 PM Re: 15 KV Cables People Had to Walk Over?
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
The dozen-or-so metallic-looking 'curlicue' tails are an important part of dielectric stress relief in the pictured cables and separable connectors. From firsthand experience, the connectors are earsplitting when they fail. IEEE 386 connectors are designed only to be handled with the business end of a shotgun hotstick—in the hands of trained lineworkers, until proven deenergized and grounded. Live or dead—they are in no way intended as openly weatherproof or for sustained exposure to sunlight—and, in particular, certainly not for "street" access.

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#126090 - 03/20/03 01:41 PM Re: 15 KV Cables People Had to Walk Over?
mamills Offline
Member

Registered: 11/30/01
Posts: 739
Loc: Wharton, Texas, USA
Bjarney: Are you saying that those long cylindrical things are connectors for these 15kv cables? Where would these things normally (under safe conditions) be found?

Yikes!

Mike (mamills)

[This message has been edited by mamills (edited 03-20-2003).]

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#126091 - 03/20/03 03:32 PM Re: 15 KV Cables People Had to Walk Over?
ameterguy Offline
Member

Registered: 05/17/02
Posts: 33
Loc: Mass
From the looks of the picture, the cables are coming out of an abandoned or temporary unused transformer pad. The opening on the right side of the picture would be the primary side & the opening at the middle of the picture would be the secondary side. The two primary cables per phase would seem to indicate that this transformer was part of a loop feed system & that the IEEE 386 connectors were connected together using the cydrical sections in the picture.

These connectors, as Bjarney stated, are only handled by shotgun hot sticks when energized or deenergized & not grounded, they were never designed for being left in the open. We uses these connectors on padmount transformers and switchgear.



[This message has been edited by ameterguy (edited 03-20-2003).]

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#126092 - 03/20/03 05:50 PM Re: 15 KV Cables People Had to Walk Over?
Nick Offline
Member

Registered: 08/13/01
Posts: 603
Loc: Riverside, CA
Find these in manholes and pad mount transformers as previously stated. Here is a link to some more info on the product you are looking at.

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#126093 - 03/20/03 06:03 PM Re: 15 KV Cables People Had to Walk Over?
mamills Offline
Member

Registered: 11/30/01
Posts: 739
Loc: Wharton, Texas, USA
Hi Nick, ameterguy. Thanks for the information!

Mike (mamills)

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#126094 - 03/20/03 06:24 PM Re: 15 KV Cables People Had to Walk Over?
ThinkGood Offline
Member

Registered: 08/07/02
Posts: 1084
Loc: Milwaukee, WI
 Quote:
...'curlicue' tails are an important part of dielectric stress relief...


Bjarney: Would you please explain that?

Also, what is the part directly in front of the vent?

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#126095 - 03/20/03 09:51 PM Re: 15 KV Cables People Had to Walk Over?
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
Mike, excuse the slow response at this end. Nick, thanks for the Elastimold link. The white band with black stripe around the body of the elbow indicates a 200-amp loadbreak elbow, that is discconnectable with a shotgun or gripall hotstick. The curly pigtail at 5:00 typically is connected to the concentric neutral under the red cable jacket. It also splits and some stands attach to a small rubber eye on the elbow for equalizing electrostatic charges that occur on the outer conductive rubber layer of the elbow. The other end of the curly wire is typically connected to the metal frame of what was probably a padmount switch or transformer. It’s common for the concrete pad to be circled by a buried copper loop with 2-4 driven rods around the pad.

I do not recognize the black cylindrical connector joining each pair of elbows. {It doesn’t seem to be illustrated or pictured in Mike’s link.}

Seems like it should have a pigtail for stress relief/electrostatic control too. [I am not sure about the rubber cap at 12:00 in the original shot.]






[This message has been edited by Bjarney (edited 03-21-2003).]

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#126096 - 03/20/03 10:08 PM Re: 15 KV Cables People Had to Walk Over?
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
An illustration of a shotgun or gripall stick for separating and connecting elbows… http://www.hubbellcatalog.com/hps/datash...33,12126,121220

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#126097 - 03/24/03 06:30 AM Re: 15 KV Cables People Had to Walk Over?
hotjava Offline
Junior Member

Registered: 03/24/03
Posts: 1
Loc: Kansas City
Thinkgood, The round item over by the vent looked to be a cap for the connectors.

Also, the long cylindrical things were some sort of tap. Im assuming this was part of some loop, and they relocated the transformer that was mounted on this pad, and extended the cables via the "taps". The whole thing was scary looking, and I cant imagine the damage that could be done if one of those was to break under load...

-Paul O'Gorman

[This message has been edited by hotjava (edited 03-24-2003).]
_________________________
-Paul O'Gorman, P.E.

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