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Joined: Jan 2005
Posts: 91
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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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Joined: Apr 2002
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Basically, a crimp splice, insulated as required.


John
Joined: Jun 2004
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I'd think an Ilsco 'mechanical' compression lug/splice barrel would be the ticket.



Tesla
Joined: Apr 2002
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OK, the 'Polaris' type blocks would work also.


John
Joined: Feb 2011
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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.

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Welcome

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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.

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Joined: Jan 2011
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What about twist-tin-tape?


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