8 awg wire... 60 amp non-fused disco... and a 50 amp HACR rated circuit breaker.

Pete

 

8 AWG? How can that be?

With a MCA of 45.2A the branch circuit would be loaded above 80% since 8 AWG allows for 50A max at 75°C

 

Here we go again

Rooftop AC unit


Ampacity is 65A (according to 310.16 @ 75°C)

Why are you quoting or even referencing table 310.16, being from Canada and all?

You installing something south? If so listen to Pete.

 

Why are you quoting or even referencing table 310.16, being from Canada and all?

You installing something south? If so listen to Pete.

I'm not, just using familiar reference

But... I still don't get it

Could someone explain that 8 awg selection

 

There's no reason why you can't use 6 awg if you want !
All he is saying is 8 awg is code compliant.

 

B. And let me know how it works out.

 

Are fuses allowed to be higher than the rating of the disconnect?

 

Here we go again

Rooftop AC unit

MOCP 70A (manufacturer)

How do I protect this

c) 100A Safety Switch with 70A Fuse

If the manufacturer is calling for a 70a fuse thats what they get. And if the fla is 45x1.25 = 56 they get #4AL ACWU90