Electrical Power Requirements
Follow these important electrical power guidelines for Private Cloud Appliance.
Use the information in this section along with the Facility Power Checklist to prepare your site.
The Private Cloud Appliance can operate effectively over a wide range of voltages and frequencies. However, it must have a reliable power source. Damage might occur if the ranges are exceeded. Electrical disturbances such as the following might damage the system:
- 
Fluctuations caused by brownouts 
- 
Wide and rapid variations in input voltage levels or in input power frequency 
- 
Electrical storms 
- 
Faults in the distribution system, such as defective wiring 
To protect your system from such disturbances, you should have a dedicated power distribution system, power-conditioning equipment, as well as lightning arresters or power cables to protect from electrical storms.
Power Distribution Units (PDUs)
Each rack has two preinstalled power distribution units. The PDUs accept different power sources. You must specify the type of PDU that is correct for your data center. The following tables list PDU requirements.
- Global PDU Specifications
- 
Item 15kVA - type 6440A 15kVA - type 6441A 15kVA - type 6442A 22kVA - type 7100873 22kVA - type 7100874 24kVA - type 6444A 24kVA - type 6445A Region North and South America, Japan and Taiwan EMEA and APAC (except Japan and Taiwan) North and South America, Japan and Taiwan North and South America, Japan and Taiwan EMEA and APAC (except Japan and Taiwan) North and South America, Japan and Taiwan EMEA and APAC (except Japan and Taiwan) Number of inputs 1 1 3 3 3 2 2 Source voltage 200-220V 220/380 - 240/415VAC 200-240V 200-240V 200-240V 200-220V 220/380 - 240/415VAC Frequency 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz Max. line current 40A 21A 24A 36.8A 32A 34.6A 16A Phase current 23A 21A N/A N/A 32A 20A 16A Recommended circuit breaker 50A 25A 30A 50A 32A 50A 25A Outlets 42 x C13 6 x C19 42 x C13 6 x C19 42 x C13 6 x C19 42 x C13 6 x C19 42 x C13 6 x C19 42 x C13 6 x C19 42 x C13 6 x C19 Outlet groups 6 6 6 6 6 6 6 Max. group current 20A 20A 20A 20A 20A 20A 18A Output voltage 200-240V 220-240V 200-240V 200-240V 200-240V 220-240V 200-240V Data center receptacle 3ph 3W + ground 60A IEC60309 3ph 4W + ground 32A IEC60309 5P 6h 400V 1ph 2W + ground 30A NEMA L6-30 1ph 2W + ground 50A Hubbell CS8265C 1ph 2W + ground 32A IEC60309 3P 6H 230V 3ph 3W + ground 60A IEC60309 3ph 4W + ground 32A IEC60309 5P 6h 400V 
- PDU Specifications for Korea
- 
Item 15 kVA - type 7600785 22KVA - type 7600788 24KVA - type 7600787 Region South Korea only South Korea only South Korea only Nominal Power Rating 15KVA 22KVA 24KVA Number of inputs 1 3 2 Source voltage 220/380 - 240/415VAC 3Ø 220-240V 220/380 - 240/415VAC 3Ø Frequency 50/60 Hz 50/60 Hz 50/60 Hz Max. line current 21A 32A 18A Phase current 21A 32A 18A Recommended circuit breaker 25A 32A 25A Outlets 42 x C13 6 x C19 42 x C13 6 x C19 42 x C13 6 x C19 Outlet groups 6 6 6 Max. group current 20A 16A 20A Output voltage 220-240V 220-240V 220-240V Data center receptacle 3ph 4W + ground 32A IEC60309 5P 6h 400V 1ph 2W + ground 32A IEC60309 3P 6H 230V 3ph 4W + ground 32A IEC60309 5P 6h 400V 
Facility Power Requirements
Electrical work and installations must comply with applicable local, state, or national electrical codes. Contact your facilities manager or qualified electrician to determine what type of power is supplied to the building.
To prevent catastrophic failures, design the input power sources to ensure adequate power is provided to the power distribution units (PDUs). When planning for power distribution requirements, balance the power load between available AC supply branch circuits. In the United States and Canada, ensure that the overall system AC input current load doesn't exceed 80 percent of the branch circuit AC current rating.
Provide a stable power source, such as an uninterruptable power supply (UPS) to reduce the possibility of component failures. If computer equipment is subjected to repeated power interruptions and fluctuations, then it's susceptible to a higher rate of component failure.
PDU power cords are 4 meters (13.12 feet) long, and 1 to 1.5 meters (3.3 to 4.9 feet) of the cord will be routed within the rack cabinet. The installation site AC power receptacle must be within 2 meters (6.6 feet) of the rack.
Circuit Breaker Requirements
Use dedicated AC breaker panels for all power circuits that supply power to the rack PDUs. Electrical work and installations must comply with applicable local, state, or national electrical codes. Rack PDUs require electrical circuits to be grounded to the Earth.
Circuit breakers are supplied by the customer. One circuit breaker is required for each power cord.
Grounding Guidelines
Private Cloud Appliance racks are shipped with grounding-type power cords (three-wire). Always connect the cords to grounded power outlets. Because different grounding methods are used, depending on location, check the grounding type, and refer to documentation, such as IEC documents, for the correct grounding method. Ensure that the facility administrator or qualified electrical engineer verifies the grounding method for the building, and performs the grounding work.