Elbows

Yes. Is there another part to this question? they aren't really hard to install, but do take some practice and some special tools. You will need a BG crimper, and an insulation stripper and semi con scorer. Don't underestimate the difficulty of stripping CN cable (if that is what will be used) without the proper tools.
 
electrofelon said:
Yes. Is there another part to this question? they aren't really hard to install, but do take some practice and some special tools. You will need a BG crimper, and an insulation stripper and semi con scorer. Don't underestimate the difficulty of stripping CN cable (if that is what will be used) without the proper tools.
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Yes guess maybe I should've expanded my questions and asked about how difficult the install is and also whats the purpose of them? Why not use prefab elbow ?
 
Alwayslearningelec said:
Yes guess maybe I should've expanded my questions and asked about how difficult the install is and also whats the purpose of them? Why not use prefab elbow ?
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The purpose is to allow insulated dead front connections to equipment, most commonly
transformers. They also provide the needed electrical stress relief at the termination of the conductor insulation. I'm not sure what you mean by "prefab elbow"

Anyone can install these if you have the tools and watch that video I linked to. The hardest part is removing the semicon, but with the correct scoring tool and a piece to practice on it's not bad.
 
Alwayslearningelec said:
Thank you very helpful ...I meant a standard rgs or pvc elbow ....but I got it now
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These have nothing to do with a raceway. They are the termination. stress cone. and physical disconnect for medium voltage cables. Note that most specs require the installer to be certified to install the brand of medium voltage terminations that are being used, even though any electrician that can read and follow directions can install them.
 
NoahsArc said:
I remember watching a demonstration of a retired lineman showing us how to splice two 750s.
He used a folding knife only.
It was perfection, like watching a neurosurgeon.
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I know there are some hotshots who say they "don't need any of those fancy stripping tools". I am very skeptical. The semicon layer is adhered to the insulation, and you need to score nearly all the way thru it, yet is is very important to not nick or score the insulation as then you have a spot where Corona discharge and cable failure can occur. The tolerance band of not nicking the insulation yet not cutting through the semicon deep enough and have it break off is very very fine. And it varies from cable to cable. Some is easier, some is harder. I think that's what lineman talk about at the end of the day is how their semicon behaved that day 😂
 
electrofelon said:
I know there are some hotshots who say they "don't need any of those fancy stripping tools". I am very skeptical. The semicon layer is adhered to the insulation, and you need to score nearly all the way thru it, yet is is very important to not nick or score the insulation as then you have a spot where Corona discharge and cable failure can occur. The tolerance band of not nicking the insulation yet not cutting through the semicon deep enough and have it break off is very very fine. And it varies from cable to cable. Some is easier, some is harder. I think that's what lineman talk about at the end of the day is how their semicon behaved that day 😂
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Doing it without the correct tools is much more labor intensive and the tools quickly pay for themselves.
 
don_resqcapt19 said:
Doing it without the correct tools is much more labor intensive and the tools quickly pay for themselves.
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The first one I did, I didn't have the cable tools (had the BG crimper). I ended up making a jig out of a razor blade screwed between two pieces of wood. I Fiddled with it and got it setup just right and was able to strip the semicon . Took me most of a day for two elbows .
 
electrofelon said:
The first one I did, I didn't have the cable tools (had the BG crimper). I ended up making a jig out of a razor blade screwed between two pieces of wood. I Fiddled with it and got it setup just right and was able to strip the semicon . Took me most of a day for two elbows .
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We did a few of them without the tools, but then the boss saw the labor, and bought us the correct tools.
 
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