6 Oct XLPE insulation is actually capable of withstanding short-term temperature up to ℃. According to ICEA P Curves based on formula. 27 Feb ICEA P (R) Equations have been established for short circuit calculations for conductors made of copper or aluminum. The Insulated Cable Engineers Association (ICEA) standard P provides a standard physics formula for determining the short-circuit withstand of.
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From my limited personal experience, this failure did not occur with older Type NM cable using metal clamp connectors. I recently icea p-32-382 across this thread in an internet search on an unrelated electrical topic.
Paul Keleher New User. What’s there to say. The clamp connector consists of a cast, threaded frame with a stamped plate attached by two screws. The icea p-32-382 is embossed with a dimple, apparently designed to provide an increased peak retention force for small-diameter cables.
One traditional test has been to wiggle the wire outside the box, tightening the clamp screws until the wire no longer moves inside the box.
Find all posts by Icea p-32-382 D.
It happened when using two cables, the one cable would have a ‘tooth’ bite into it, and it quickly became immobile. This includes receptacles, panels, wiring, etc. Send a private message to Thomas H.
You are really just trying to keep them away from the slings and arrows of outragous construction workers. What is the correct way to icea p-32-382 a icea p-32-382 that is too big.
Jim Port Ica Guest. Icea p-32-382 is tight enough. Bad design, I don’t see them anymore. IMO the entire problem has been due to improper field installation practices as mentioned by a few others in this ancient thread. In fact you can fish them with no support once the wall is closed up.
This is first year apprentice stuff. The testing methodology was to measure low-voltage short circuits. The instrument records icea p-32-382 short-circuit current l-32-382 the breaker trip-time in milliseconds.
So, I signed up to post here because I may icea p-32-382 able to contribute to this discussion. Abernathy’s Web site Find all posts by Paul W. In out of tests, the value of I2T that was reached in the short-circuit test exceeded the maximum safe limit for that value in ICEA P Jim, I used a listed test instrument icea p-32-382 conduct short-circuit tests at V outlets.
Find all posts by Thomas H. The trick with most things like this cable retention hardware is to only twist the shaft of the screwdriver. Further research into this problem has lead to some rather startling evidence: Find all posts by Robert Meier. That is why they require another support within 12″ of the icea p-32-382. Abernathy Visit Paul W. However I have neither icea p-32-382 authority nor expertise to make a specific recommendation for appropriate mitigation of this hazard.
Examination of failed cables shows that this dimple is the source of penetration into the conductors.
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Informal testing shows that at this clamping force icea p-32-382 cable has already shorted or been irreparably damaged. The icea p-32-382 cable was of larger diameter and provided more resistance feedback to the installer as the screws were tightened. It appears likely that cable damage occurs even with clamping force below that required to cause low-voltage shorts.
Guess it gives these guys in labs something to experiment with. BB code is On. Again under informal testing, there is no perceivable force-feedback cue to the installer that the clamping screws are icea p-32-382 tight.
I did not author it. Find all posts by Paul Keleher. Experimentally flattening this dimple eliminated the failures, as did bending the plate such that the minimum opening at the fully screwed-down position was increased from approximately 4 mm to about 5 mm.
Greg Fretwell Active Poster. While the other icea p-32-382 sliding, no teeth on the other side, so an electrician would crank down to get the one cable secure, icea p-32-382 in part dig into the other cable. I just posted it This is the standard cited in a new Informational Note under Icea p-32-382 start cranking down on the handle and you WILL overtighten it.