Shop › 3-Phase Main Breaker Replacement (up to 400A) 3-Phase Main Breaker Replacement (up to 400A) $2,499.00 Torque and replacement of standard 3-phase commercial main breakers up to 400 Amps. Includes de-energization and testing. Add To Cart Added! Torque and replacement of standard 3-phase commercial main breakers up to 400 Amps. Includes de-energization and testing.
