Wire chart

Djelite

New User
Location
Ny
Occupation
Electrician
Hi mike in your commercial and industrial wiring and raceway chart it list several ratings for #6 AWG and #8 AWG conductors. This usually determined by specific used. In the chart it doesn’t specify the special use or different. And why do these values also differ from those in 310.15b16(ampacity)?
 

480sparky

Senior Member
Location
Iowegia
Mike does not participate here in the forum.

Perhaps you could provide a link to the chart you're asking about so us peons might be able to help.
 

hbiss

EC, Westchester, New York NEC: 2014
Location
Hawthorne, New York NEC: 2014
Occupation
EC
...it list several ratings for #6 AWG and #8 AWG conductors. This usually determined by specific used. In the chart it doesn’t specify the special use or different. And why do these values also differ from those in 310.15b16(ampacity)?
Never saw that chart. It looks like something an engineer or architect would use in the boilerplate to spec wire sizes for a commercial or industrial project. (Nothing smaller than #12 for instance.) Most are overkill and if you look at the maximums for the #6 and #8 (and others) you will see that the OC protection values don't exceed those listed in 310.15b16.

So that chart is not something we would go by unless we were told to by the job specs.

-Hal
 
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