Ampacity

[kamathews]

I know there's a table in the codebook that gives this - but it's at work right now.

What's the ampacity rating of a 3 conductor 4AWG Aluminum feed to my house?

 

[frenchelectrican]

Re: Ampacity

is that is se cable or indiual conducters?? and how long the run it is ?? basically #4 al wire are run about 60 to 80 depend on what cable you have .
P.S. a quick short cut #4 al =#6 cu it will be almost the same
if you have 60 amp main fuse or breaker that will be correct size but use 100 amps you are pushing your luck with it for 100 amps really require #2 al anyway or #3 cu

merci marc

 

[bennie]

Re: Ampacity

Is this cable in free air, conduit, or direct buried?

 

[iwire]

Re: Ampacity

For single phase 120/240 Dwelling service you can use Table 310.15(B)(6)

100 amp service #4 copper or #2 aluminum.

But this table does not go below 100 so back to 310.16 at most the #4 aluminum would be rated 65 amps.