2004年12月20日 · Re: temperature rating on breaker That's the way the devices have been marked for some time now.Take a look at 2002NEC art 110-14(C)(1) Equipment provisions. Also, when applying product marked with 75decC terminations with existing 60degC wire one always applies the wire still at 60degC.

2005年5月4日 · Re: temperature rating of mechanical lugs These lugs are under 110.14(C)(2). They should have BOTH a "listed" ampacity AND temperature rating. The temperature rating is typically 90C and it is appropriate to use 90C rated conductors at their Table 310.16, 90C column as appropriately adjusted by ambient and Section 310.15.

2020年1月16日 · Therefore the temperature rating of the device terminal will set a limit on the ampacity of a connected wire if the terminal temperature rating is less than the maximum rating of the wire itself. For example, if the terminal is rated at 75°C then the allowed conductor ampacity can be no higher than its 75°C value, even when its insulation is ...

2015年11月13日 · In summary per NEC 110.14, you must base your cable ampacity on the temperature rating of the conductor equivalent to the temperature rating of the terminal that the cable would be terminating to (I.E. motor, molded case breaker, switchgear, etc.). Here is my scenario: I am trying to provide power to a 3-ph 460V 125HP motor.

2008年4月19日 · I Agree Compare Article 338.10 (B) (4) in both the 05 and 08 code. The 08 code removes "excluding 334.80" which means the entire part 2 of article 334 must be complied with, including 334.80 which limits final ampacity of se cable to the 60 degree column.

2023年5月16日 · For Type SE cable with ungrounded conductor sizes 10 AWG and smaller, where installed in contact with thermal insulation, the ampacity shall be in accordance with 60°C (140°F) conductor temperature rating. The maximum conductor temperature rating shall be permitted to be used for ampacity adjustment and correction purposes, if the final ...

2018年11月15日 · Without knowing or caring about the chemistry of the insulation, the powers that be must have decided that THHN is an indoors insulation, but THWN is good for outdoors. So if outoors, you'd have to ignore any THHN rating and use the THWN rating. But with THWN-2, it no longer matters, practically, for us.

2018年6月7日 · What is the temperature rating of schedule 40 pvc ?.( 2011 code) Code requires that PVC be listed, does not specify the requirements.

2021年1月16日 · The temperature rating of conductor insulation is to limit long-term degradation. “Thermal aging characteristics of the polymer” to quote Anixter. It has nothing to do with the melting point.

2021年5月12日 · #8/3 NM-B wire is rated for 90°C temperature however the NEC current carrying capacity limits its rating based on 60°C. This is based on the typical 60°C rating for residential applications. My question is if I am using it on equipment that has terminal temperature ratings of 75°C or 90°C, am...