No, you cannot downsize the conductors feeding the 60 amp disconnect based on the motor's current draw alone. The 60 amp disconnect is rated for a maximum of 60 amps, and the conductors feeding it must be sized accordingly. Here's why: Disconnect Rating

The disconnect is rated for 60 amps, meaning it's designed to safely handle up to 60 amps of current. The conductors feeding the disconnect must be able to carry that full rated current of the disconnect.

Overcurrent Protection

The overcurrent protection device (circuit breaker or fuses) upstream of the disconnect is likely sized to protect the 6 gauge wire, therefore, should the wire between the breaker and disconnect somehow be compromised and exposed to higher amp draw then the wire is rated for, you could create a fire hazard.

Code Requirements

Electrical codes (like the NEC in the US) dictate minimum conductor sizes based on the overcurrent protection device. You're likely required to use conductors rated for 60 amps for a 60 amp disconnect.

Future Proofing

Even if your current motor only draws 10-11 amps, future motors or loads connected to that disconnect might require more current. Keeping the 6 gauge wire ensures you can use the disconnect's full 60 amp capacity without needing to rewire.

What you can do

You can downsize the conductors after the disconnect, going to the motor, but only if you follow the specific rules for motor circuits in your electrical code (e.g., NEC Article 430 in the US). These rules allow for downsizing the conductors to the motor because motors have specific overload protection separate from the branch circuit overcurrent protection.

Motor Circuit Calculation

Calculate the required conductor size for the motor circuit according to the code, taking into account the motor's full-load current, starting current, and duty cycle. This calculation will likely allow you to use 12 AWG or 14 AWG wire after the disconnect.

Overload Protection

Ensure the motor has proper overload protection (either integral to the motor or a separate overload relay) sized according to the motor's nameplate current.

Short-Circuit and Ground-Fault Protection

The branch circuit overcurrent protection (the 60 amp breaker/fuses) provides short-circuit and ground-fault protection for the motor circuit.

In summary



Don't downsize the conductors feeding the disconnect. They must be sized to match the disconnect's ampacity rating. You can downsize the conductors from the disconnect to* the motor, but only if you follow the specific rules for motor circuits in your electrical code and provide proper overload protection for the motor.

Important: Electrical work can be dangerous. If you're not a qualified electrician, it's best to consult with one to ensure the wiring is done safely and in accordance with local codes. Incorrect wiring can lead to fire hazards and electrical shock. Flag for review