Hvac wire size

[number2]

Residential
I have a unit with a heat kit strip 41.9/47.4  mca 45/50 mop
My question is what wire size would I need to feed this unit in aluminum?

Normally I use copper but it's too expensive and I heard this new aluminum is not so bad type se

 

[mtnelect]

Residential
I have a unit with a heat kit strip 41.9/47.4  mca 45/50 mop
My question is what wire size would I need to feed this unit in aluminum?

Normally I use copper but it's too expensive and I heard this new aluminum is not so bad type se

My suggestion, refer to the manufacturer's Installation Manual that will include more detailed information than just the equipment name plate.
Most HVAC manufacturers don't allow Aluminum.

 

[infinity]

#6 Al is good for 50 amps.

 

[number2]

My suggestion, refer to the manufacturer's Installation Manual that will include more detailed information than just the equipment name plate.
Most HVAC manufacturers don't allow Aluminum.

Thank you for your response i will check it out. Ive seen a few times where they run aluminum wire to the disconnect then a whip containing copper to the unit.

 

[number2]

#6 Al is good for 50 amps.

Thank you. That's what I came up with looking into the code book. Since type se cable go off the 75c degree column. (Only 10 awg smaller goes off the 60c degrees column)

 

[infinity]

Thank you. That's what I came up with looking into the code book. Since type se cable go off the 75c degree column. (Only 10 awg smaller goes off the 60c degrees column)

Yes if using SE cable you can use the 75° C ampacity. Just out of curiosity what voltage are you applying?

 

[mtnelect]

This might help to explain

 

[number2]

Yes if using SE cable you can use the 75° C ampacity. Just out of curiosity what voltage are you

240v system

 

[infinity]

240v system

So the #6 Al SE cable with a 50 amp OCPD would work.