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Installation Procedures: Ensure that All Power is Off
24 InfraStruXure System—Installation and Start-Up
3. Set the Main Input (A) and Bypass Input (B) switches and the Cross Tie Input (X) circuit
breaker (if applicable) on the PDU to the OFF position.
4. Open (turn OFF) the Q1, Q2, and Q3 circuit breakers on the PDU.
5. Set each upstream utility circuit breaker that will feed the PDU to OFF.