Plug in the Oracle FS System components (Pilots, Controllers, and Drive Enclosures), into the PDUs so that they do not exceed the amperage rating of any outlet group. Exceeding the amperage rating, can trip the circuit breakers.
The requirements of Underwriters Laboratories (UL) limit the power draw to approximately 80% of the circuit breaker rating. For example: In the United States where the voltage supply is at 240V, the power in a 30A circuit is 24A. Thus the power available for use is 80% of the total amperage rating of the circuit. The International Electrotechnical Commission (IEC) uses a system where the exact available power is listed as the circuit breaker rating. For example: In Europe, where the voltage supply is at 230V, the power in a 24A circuit is 24A.
For data centers with an input main power of 208V (single-phase from the building), the amperes drawn increases by roughly 15% over a 240V service.
All PDUs have a remote monitoring capability that allows monitoring the current consumption locally using an operator accessible meter and function switch or remotely through a network connection. The monitor measures consumption on each phase or inlet circuit attached to the PDU.
Alternately, you can use a voltmeter to verify the voltage of the available power. The Oracle vertical PDUs support multiple ranges of voltage, and the current rating on the PDU circuit breakers vary with the external available power. The external available power determines the number of Oracle FS System components that can be connected to the PDU port groups or circuit breakers (CB). If the voltage of the input power into the PDU is lower than the nominal rating of the PDU, the current rating on the circuit breakers is decreased to compensate for the lower voltage of the available power.