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Oracle® Rack Cabinet 1242 Power Distribution Units User's Guide

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Updated: March 2018

Circuit Breaker Overview

Each PDU contains a circuit breaker for each outlet group. These circuit breakers are safety devices to protect equipment from damage and you from personal injury. A circuit breaker trips and shuts the power off to an outlet group when it detects an overloaded circuit, a short circuit, or another fault condition.

When operating normally in the On (|) position, the circuit breakers are flush with the side of the PDU. When tripped to the Off (0) position, the circuit breakers extend beyond the side of the PDU.


Caution  -  To prevent injury and equipment damage, always determine the cause of a tripped circuit breaker before resetting it.