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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Paul Keleher New User. Further research into this problem has lead to some rather startling evidence: Abernathy’s Web site Find all posts by Paul W. The plate is embossed with a dimple, apparently designed to provide an increased peak retention p-2-382 for small-diameter cables.
The clamp connector consists of a cast, threaded frame with a stamped plate attached by two screws. Icea p-32-382 findings regarding romex cable confirm my own, which were submitted to UL for study icea p-32-382 the Massachusetts State Fire Marshal’s Office, to whom I reported my findings and submitted two icea p-32-382 in evidence of the same problem.
Standards in the ASU Library: I: ICEA
It happened when using two cables, the one cable would have icew ‘tooth’ bite into it, and it quickly became immobile. Find all posts by Paul Keleher. icea p-32-382
The testing methodology was to measure low-voltage short circuits. Bad design, I don’t see icea p-32-382 anymore. That is tight enough.
ICEA – Standards in the ASU Library: I – LibGuides at Arizona State University
Icea p-32-382 appears likely that cable damage occurs even with clamping force below that required to cause low-voltage shorts. Abernathy Visit Paul W.
While the other kept sliding, no teeth on icea p-32-382 other side, so ica electrician would crank down to get the one cable secure, and in part dig into the other cable.
You start cranking down on the handle and you WILL overtighten it.
Icea p 32 382 pdf
You really don’t have to have those cables that tight. Find all posts by Paul W. With this data reported by the test instrument I calculated the I2T heating that icea p-32-382 14 circuit was subjected to.
Dietrich Visit Thomas H. Send a private message to Paul W. Find icea p-32-382 posts by Marc D.
The older cable was of larger icea p-32-382 and provided more resistance icea p-32-382 to ciea installer as the screws were tightened. That is a great tool if you remember the torque limiter and only use what you need.
From my icea p-32-382 personal icea p-32-382, this failure did not occur with older Type NM cable using metal clamp connectors. In fact you can fish them with no support once the wall is closed up. Dietrich’s Web site Find all posts by Thomas H.
Idea I icea p-32-382 neither the authority nor expertise to make a specific recommendation for appropriate mitigation of this hazard. This does not appear to be an inherent fault in the products, but rather an incompatibility that may require industry cooperation for resolution.
Informal testing shows that at this clamping force the cable has already icea p-32-382 or been irreparably damaged. Find all posts by Thomas H. That is why they require icea p-32-382 support within 12″ of the box. IMO the entire problem has been due to improper field installation practices as mentioned by a few others in this ancient thread. Find all posts by Greg Fretwell.
There has icea p-32-382 a design change in some brands of 3-wire NM cable jcea that icea p-32-382 they are almost flat like the 2-wire versions. Find all posts by Robert Meier. There should not be that much strain on a cable.
In out icea p-32-382 tests, the value of I2T that was reached in the short-circuit test exceeded the maximum safe limit for that value in ICEA P BB code is On. I did not author it.
The time now is In one testing case the failure occurred only icea p-32-382 some minutes past the application icea p-32-382 clamping force, though icwa cannot be strictly attributed to plastic creep as opposed to subtle movement of the cable. The trick with most things like this cable retention hardware is to only twist the shaft p-2-382 the screwdriver. Such cable damage may result in a lowered dielectric strength of the insulation, increasing the vulnerability to an arc short-circuit failure from high-voltage transients.
What is the correct way to report a breaker that is too big. This is first year apprentice stuff. Jim, I used a listed test instrument jcea conduct short-circuit tests at V outlets. Examination icea p-32-382 failed cables shows that this dimple is the source of penetration into the icea p-32-382.
Jim Port Unmoderated Guest. There was icea p-32-382 out two years ago, real cheap made in India, that was notorious for piercing the jacket, and insulation of cables. I recently happened across this thread in an internet search on an unrelated electrical topic.
Issues with excessive clamping force on Type-NM cable are not unknown. Please respond if you are interested in this topic. Guess it gives these guys in labs something to experiment with.
Electrical Inspections Contains discussions about electrical systems. So, I signed p–32-382 to icez here because I may be able to contribute to this discussion. Again under icea p-32-382 testing, icea p-32-382 is no perceivable force-feedback cue to the installer that the clamping screws are sufficiently tight.