using #6 AL SEU for car charger

[Stevenfyeager]

For a customer's 50 amp car charger circuit, I plan on using AL #6 SEU and change to #6 Cu at each end of the circuit. If I'm reading 310.15 (B) (16) correctly,, #6 AL will carry 50 amps. Is this acceptable ? Thank you

 

[wwhitney]

#6 Al 75C ampacity is 50A, looks good to me. Note that SE cable can't be installed underground in conduit.

EVSEs often specify "Cu conductors only," so I can see why you'd need to change to Cu (which could be #8) at the load end, but why change at the breaker?

Cheers, Wayne

 

[nizak]

Will the SE cable be running through insulation at any point?

 

[wwhitney]

Will the SE cable be running through insulation at any point?

Looks like that's only an issue in the 2011 and 2014 NECs, and Indiana is on the 2008 NEC. (?)

Cheers, Wayne

 

[Stevenfyeager]

Looks like that's only an issue in the 2011 and 2014 NECs, and Indiana is on the 2008 NEC. (?)

Cheers, Wayne

Actually, this job will be in KY. They use a later date NEC, at least 2017. I only occasionally work there.

 

[Stevenfyeager]

Will the SE cable be running through insulation at any point?

not sure, I haven't seen the job but have been in the customer's unfinished basement a couple of years ago.

 

[augie47]

Under the 2017 Code you should b fine with the 75° rating.

 

[Ponchik]

Why are you not installing copper all the way?

 

[LarryFine]

Why are you not installing copper all the way?

$!

 

[Ponchik]

$!

Under the 2017 Code you should b fine with the 75° rating.

May you post the code section please.

 

[augie47]

334.80 shows restrictions on #10 & smaller. Otherwise you rely on the ratings of the conductors. SE cable conductors are THHN or XHHW,
The attached data sheets go into more detail:https://assets.southwire.com/ImConvServlet/imconv/29eb61d214155f6967f8be2c0fd9b8614a3b20bc/origin?assetDescr=Copper Service Entrance SER Cable.spec

https://encorewire-prod.imgix.net/media/products/product-sheets/aluminum/residential/EncoreWire-AL-SE-U.pdf