[DPinst]

New to the site and trying to find a clause in the CEC that states:
"If wire or cable is run in ambient above 30C then the rating of the wire must also increase by the same amount."
I hope I have the wording correct .It is probably right in font of me:laughing:"

Thank you in advance

 

[BlackHowling]

 4-008 Insulated conductors (see Appendix B) (1) Except as provided for by Rules 4-012, 4-020, and 4-040, or as may be otherwise required by other sections of this Code, insulated conductors shall be of the types specified in Table 19 for the specific condition of use and shall be suitable for the particular location involved with respect to, but not limited to (a) moisture; (b) corrosive action; (c) temperature; (d) degree of enclosure; and (e) exposure to mechanical injury.


As long as the temp rating is above ambient it is fine to fun the wire.

 

[Tsmil]

Table 5A shows the derating factor for ambient temperatures above 30C.

 

[chevyvortech]

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[DPinst]

Thank you for the replies. The clause was shown to me on the weekend on the weekend. I thought I had made note of it in my code book but neglected to.I took it to mean if I ran a cable across the roof, and used the 50 C ambient rating as specified here in BC .That If I was using 90 C wire I would also have to increase the wire rating by 20 C (50-30) to 110C.

of all the things I lost I miss my mind the most

 

[DPinst]

Thank you again for all your replies. I was able to locate the clause
I was not specific enough in my question or my information . The clause only applies to section 28-103-3 .

Motor supply conductor insulation ONLY!!!!

For ambient higher than 30C ,the supply conductor insulation rating shall be increased at least by the difference between the ambient and 30C