Replies

1. 
   BillHartmann | Apr 16, 2006 07:44am | #1

   You have to use a romex connector.

   The idea is to keep the metal box from cutting in to the insulation.

   In the past there where a "nipple" like with a clamping plate.

   Now there are also plastic snap in ones.

   Heres the metal ones.

   http://pressurewasherparts.net/catalog/index.php?cPath=31_658_661&osCsid=a436ae250b3509aade03a1492dd7394a

   And two style of the plastic

   http://www.rack-a-tiers.com/pro_connectors.htm#romex

   http://www.cornerhardware.com/index.php?main_page=product_info&cPath=6739_6769_7062&products_id=20533&zenid=2aa1292ef8321e7fc34c470d0ff90d04

   
   

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   Edited 4/16/2006 12:46 am by BillHartmann

2. 
   Renoun | Apr 16, 2006 07:55pm | #2

   I like to keep a few of the split plastic romex clamps around since they can be slipped over cable that was installed without clamps. I see DIY work fairly frequently where clamps were not used and like to make things right when I can do so easily, especially on T&M jobs.

1. 
   brownbagg | Apr 16, 2006 08:48pm | #3

   does lowes or Hd sells them

1. 
   IMERC | Apr 16, 2006 08:58pm | #4

   yup...

   Lowes... each...

   HD ... bulk...Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

   WOW!!! What a Ride!<!----><!---->

   Forget the primal scream, just ROAR!!!

3. 
   4Lorn1 | Apr 17, 2006 01:00am | #5

   Bill Hartman has it covered.

   The purpose of the connectors, no matter which form you use, is to protect the cable from the edges of the knock-out and to provide some strain relief so that the cable jacket doesn't get pulled out exposing the wires, and their delicate insulation, to possible damage.

   I like the clamp type die-cast connectors which mount by use of a lock-nut. They are sturdy and reliable. Providing strong strain relief. The down sides are that the installation has to be from outside the box and the clamping action can be too strong. If you horse the clamp, particularly on four-wire cables, it can cause a short. Some of these 1/2" clamps are rated for two runs of 12/2.

   Arlington makes a line of black flexible push-in connectors which is also useful. Advantage being that these can be inserted around a cable that is already in place, great for patching after a hack. This can also be done from inside the panel. This defeats the strain relief but still protects the cable from the steel enclosure.

   I particularly like the Arlington brand because the plastic is better deployed than many others to protect the cable and the plastic used is pliable making insertion of the connector, even around cabled already in place, and threading of the cable much smoother.

   There are also Aluminum sleeves that are inserted from inside the panel and are crimped onto the cable jacket once the cable is threaded in. I never used them much but they work well enough. Some care is needed when crimping, especially with four-wire cables, to get a sufficient clamping effect while not damaging the cable.

1. 
   Sphere | Apr 17, 2006 02:54am | #6

   Thanks.

   Spheramid Enterprises Architectural Woodworks

   You gotta be kidding me ..Jorge is @ what %? Now?