knight1fox3
Member
Hello,
In doing voltage drop calculations with the use of Table 9 in NEC 2008 (effective Z at 0.85 PF for copper wire), I've encountered a question asking if this calculation can be done for 90 deg. C as opposed to 75 deg. C which NEC Table 9 specifies. It is evident that NEC 2008 does not publish a table with resistance/reactance values for 90 deg. C. Could the effective Z listed in the table be adjusted using the appropriate temperature coefficient of copper? Any feedback or past experience with this issue would be greatly appreciated. Thanks in advance.
In doing voltage drop calculations with the use of Table 9 in NEC 2008 (effective Z at 0.85 PF for copper wire), I've encountered a question asking if this calculation can be done for 90 deg. C as opposed to 75 deg. C which NEC Table 9 specifies. It is evident that NEC 2008 does not publish a table with resistance/reactance values for 90 deg. C. Could the effective Z listed in the table be adjusted using the appropriate temperature coefficient of copper? Any feedback or past experience with this issue would be greatly appreciated. Thanks in advance.