Correction:

Oct. 1, 2004
The answer to the second question in Code Quandaries on page 60 of the August 2004 issue incorrectly applied an ampacity taken from the 75C column (65A) of Table 310.16 for the 6 AWG THHN conductor in question. It should have been taken from the 90C column (75A), which would have changed the rating as follows: (75A0.80=60A)

The answer to the second question in Code Quandaries on page 60 of the August 2004 issue incorrectly applied an ampacity taken from the 75°C column (65A) of Table 310.16 for the 6 AWG THHN conductor in question. It should have been taken from the 90°C column (75A), which would have changed the rating as follows:

(75A×0.80=60A)

Voice your opinion!

To join the conversation, and become an exclusive member of EC&M, create an account today!

Sponsored Recommendations

Electrical Conduit Comparison Chart

CHAMPION FIBERGLASS electrical conduit is a lightweight, durable option that provides lasting savings when compared to other materials. Compare electrical conduit types including...

Fiberglass Electrical Conduit Chemical Resistance Chart

This information is provided solely as a guide since it is impossible to anticipate all individual site conditions. For specific applications which are not covered in this guide...

Considerations for Direct Burial Conduit

Installation type plays a key role in the type of conduit selected for electrical systems in industrial construction projects. Above ground, below ground, direct buried, encased...

How to Calculate Labor Costs

Most important to accurately estimating labor costs is knowing the approximate hours required for project completion. Learn how to calculate electrical labor cost.