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#199271 - 02/18/11 01:46 PM Lashing together jumpers with nylon rope
wewire2 Offline
Member

Registered: 11/14/02
Posts: 246
Loc: California
what's with the sticker in pull sections and gutters that require you to lash the jumpers together with nylon rope?
Isn't that considered a fire hazard? I would post a photo
of the sticker but I'm not sure about copyright infringement.

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#199272 - 02/18/11 02:34 PM Re: Lashing together jumpers with nylon rope [Re: wewire2]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6805
Loc: Brick, NJ USA
Copyright should not be an issue, but I'm another Sparky...not a lawyer.

I'll take a shot....lashing conductors to prevent 'whipping' in the event of a fault?
_________________________
John

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#199273 - 02/18/11 03:09 PM Re: Lashing together jumpers with nylon rope [Re: wewire2]
mikesh Offline
Member

Registered: 06/07/06
Posts: 614
Loc: Victoria, BC, Canada
I think Hotline has it. the higher the fault current the higher the electro - motive forces involved. It is important to brace conductors inside splitters and gutters against the mechanical damage and potential electrical damage in high current faults. Small wires are often self limiting in the fault current they can conduct but as the wire size increases so does the current and associated mechanical forces.
I have never seen these labels.

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#199278 - 02/18/11 09:34 PM Re: Lashing together jumpers with nylon rope [Re: wewire2]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6805
Loc: Brick, NJ USA
I have a video from Bussmann (Safety Basics) and there are a few 'demo' faults with conductors whipping. And, I seem to remember a few of the 'old timers' would lash conductors, either out of habit, or perhaps pride. Dome was really works of art!
_________________________
John

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#199279 - 02/18/11 09:49 PM Re: Lashing together jumpers with nylon rope [Re: wewire2]
wewire2 Offline
Member

Registered: 11/14/02
Posts: 246
Loc: California
Reminds me of the movies where an electrical wire shorts out. The wire does a snake dance every time.

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#199282 - 02/19/11 05:25 AM Re: Lashing together jumpers with nylon rope [Re: wewire2]
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
You guys are using nylon rope to try and negate the electro-motive forces under fault conditions?
Over here you are required to clamp wires and cables with saddles (over a certain size, of course).
Pretty much you are wasting your time with either rope or saddles.
Fault currents and their effects are something that is little understood by both designers and electricians.
If you've ever seen a HV cable snake around after a fault down-stream, you'll know what I'm on about.
_________________________
Let's face it, these days if you're not young, you're old - Red Green grin

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#199289 - 02/19/11 09:40 AM Re: Lashing together jumpers with nylon rope [Re: wewire2]
Texas_Ranger Offline
Member

Registered: 12/17/01
Posts: 2343
Loc: Vienna, Austria
Regarding Copyright issues: I'm not a lawyer, but from what I've read from both US and European sources, if you take a picture of something, you hold the copyright to the picture, and no one else. There are only two limitations: a) the owner of the premises where you stand while taking the picture can tell you not to take any pictures and b) if you take pictures of any people they have to consent before you publish the picture. In some countries there are particular laws concerning publically displayed works of art (e.g. statues in the street) but I haven't heard of something like that in the US, and a sticker in a piece of electric equipment can hardly be considered artwork.

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#199314 - 02/19/11 10:10 PM Re: Lashing together jumpers with nylon rope [Re: wewire2]
wewire2 Offline
Member

Registered: 11/14/02
Posts: 246
Loc: California
Here's a photo of the sticker.


Attachments
Beeline.jpg

Description: Beeline Sticker



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#199319 - 02/20/11 07:42 AM Re: Lashing together jumpers with nylon rope [Re: wewire2]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6805
Loc: Brick, NJ USA
IMHO, I stay with my original comment above, but someone may have a better reason.

'Beeline' seems to remind me of a manufacturer from the past?
_________________________
John

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#199320 - 02/20/11 07:51 AM Re: Lashing together jumpers with nylon rope [Re: wewire2]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6805
Loc: Brick, NJ USA
'Beeline' is now within the Cooper group, thanks to Google.

Website has an issue when I was hunting to see if there is any current info. Time permitting, I'll get back later.
_________________________
John

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