It is very uncommon today (there are some available). It would not be done for any typical commercial building. On another note, a 1200 amp main breaker feeding a distribution board often has 1.5 -2.5X in circuit breaker capacity attached ie the circuit breakers would add up to 2000 amps or so.
A: Thomas: Per 240.87, any breaker that is greater than or can be adjusted to 1200Amps must be equipped with the technology. In actuality, especially if you employ ARMs, applying the technology on feeder circuits minimizes the outage should an event occur.
Breakers help to keep the electrical currents flowing properly in your home, shielding you and your family from electrical fires. In terms of Amps, 200 is the standard in most homes today. Where can you buy 200 Amp breakers?
Extended Part No: R2CB-1200A-1200F-3P-PF-NG0 Three pole, electronic trip, 600 volt rated circuit breaker. Includes line and load lugs and mounting hardware. 4 in stock (can be backordered) Part No: 2121387 Categories: Electronic Trip, Molded Case Circuit Breakers
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Extended Part No: R2CB-1200A-1200F-3P-PF-NG0 Three pole, electronic trip, 600 volt rated circuit breaker. Includes line and load lugs and mounting hardware.
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