If your main circuit breaker is only rated at 630 amps, this busbar power system circuit breaker adapter 630A 4P is perfect for you. This busbar adapter allows you to safely and easily connect high-current electrical equipment to the circuit breaker box. With its sturdy construction and durable finish, this adapter is ideal for heavy-duty use. The adapter also supports irregularly shaped bus bars. The main feature of this product is the front connection type, which allows the user to connect directly without removing the adapter from the system. If you have any questions, please feel free to contact us.