Metallic vs. non metallic SO connectors [RE-wrenches]

[Ray Walters]

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We use a UL listed plastic strain relief from Del City Wire. Its a little 
heavier duty than the ones that come with some modules, and since they 
don't have lock nuts, we supply our own metal ones. I work on a lot of old 
modules here, and I see about 15% to30% failure of those old plastic 
locknuts. If working with a tracking system, the locknut failure can loosen 
the electrical connection in the module J box, which (with other factors) 
can lead to a nasty terminal block meltdown. I'll send some pictures if 
anyone wants. Considering the cost of 1/2" steel lock nuts, why keep using 
the inferior plastic ones?
What are other wrenches using to tighten those pesky strain reliefs without 
digging into the back of the module, twisting up the wire, or straining the 
sometimes wimpy j box? I use a small 7" channel locks.

Ray





>I'm
>inclined to go with the Carlons and forget about the metal lock  nuts -will
>find out in a couple of years how they hold  up.
>
>
>
>I have been using plastic compression fittings on the backs of modules for
>years with few problems.
>
>Don

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