You're on the right track, but there's a bit more to it. Here's the breakdown: The Breaker Rating

You're correct that the breaker's terminals are only rated for 75°C conductors for sizes #6 AWG through #2 AWG.

NM Cable (Romex) and Ampacity

NM cable has an ampacity based on 60°C. This means you have to look at the 60°C ampacity rating in the NEC (National Electrical Code) tables when determining the allowed current for NM cable.

How to Apply It


Identify the load's current requirement

Determine how many amps your circuit needs to handle.2.

Select NM cable based on the 60°C ampacity rating

Choose an NM cable size that has a 60°C ampacity rating that meets or exceeds the required current.3.

Check Terminal Temperature Limitations

Ensure the wire size being used corresponds to a terminal temperature limitation on the breaker.

In summary

Yes, it is possible to use NM cable sizes larger than #8 on this breaker. You just have to make sure that you are only using sizes #6-#2 with 75 degrees and anything smaller is within 60 degrees.

Important Considerations



Local Codes

Always check with your local electrical codes. They might have more stringent requirements or specific interpretations.*

Professional Advice: If you're unsure about any aspect of electrical work, consult a qualified electrician. Electrical work can be dangerous, and it's essential to ensure safety and compliance with codes. Flag for review