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#197797 - 12/20/10 05:55 PM Splicing cables in cable tray?  
Helectric  Offline
Member
Joined: Jan 2005
Posts: 90
Brandon, SD
According to 392.8-A of the 2008 NEC, I'm allowed to splice cables in a cable tray as long as they are "made and insulated by approve methods. Does anyone have an opinion on what constitutes an approved method? I realize that the code's defanition of approved is "acceptable to the authority having juristiction" but am looking for opinions on best practices.


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#197804 - 12/20/10 08:00 PM Re: Splicing cables in cable tray? [Re: Helectric]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,874
Brick, NJ USA
Basically, a crimp splice, insulated as required.


John

#197807 - 12/20/10 08:15 PM Re: Splicing cables in cable tray? [Re: HotLine1]  
Tesla  Offline
Member
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
I'd think an Ilsco 'mechanical' compression lug/splice barrel would be the ticket.



Tesla

#197811 - 12/21/10 09:42 AM Re: Splicing cables in cable tray? [Re: Tesla]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,874
Brick, NJ USA
OK, the 'Polaris' type blocks would work also.


John

#198881 - 02/06/11 09:23 PM Re: Splicing cables in cable tray? [Re: Helectric]  
nercGerald  Offline
Member
Joined: Feb 2011
Posts: 15
North Pole, Alaska
We used Raychem splice kits up north (Prudhoe Bay) and on the pipeline. 3M is another good one. I have in a bind used split bolt connectors with rubber tape and Scotch 88 over that with a sealer over that, but they were never inspected by an inspector. The kits are better.


#199050 - 02/11/11 10:04 PM Re: Splicing cables in cable tray? [Re: Helectric]  
PAteenlectrician  Offline
Member
Joined: Jan 2011
Posts: 64
Cressona, Pa, U.S.A. (Schuylki...
Welcome


#199055 - 02/11/11 11:57 PM Re: Splicing cables in cable tray? [Re: Helectric]  
gl53  Offline
New Member
Joined: Feb 2011
Posts: 4
Texas
As a personal practice I use crimp type devices over wire nuts, split bolts or terminal lugs. Connection blocks need a large amout of space in my opinion to make room for servicing the connection in the future. If there is an isue of multiple splices I would the use a termination box. Last, an approved splice replaces the insulation charactoristics of the cable. Not only voltage, but temperature and environmental protection. A double layer of half lap rubber followed by a double layer of half lap 33 covers a large percentage of insulation types.

Having Fun
-Gary


#199085 - 02/13/11 12:34 AM Re: Splicing cables in cable tray? [Re: Helectric]  
PAteenlectrician  Offline
Member
Joined: Jan 2011
Posts: 64
Cressona, Pa, U.S.A. (Schuylki...
What about twist-tin-tape?



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