Refer to the
Dell EMC Best Practices Guide for AC Power Connections for PowerMax 2000, 8000 with PowerMaxOS
for required items
at the customer site.
Best practices: Power configuration guidelines
The following section provides best practice guidelines for evaluating and connecting power, as well as for choosing a UPS component.
Uptime Institute best practices
Follow these best practice guidelines when connecting AC power to the array:
•
The Dell EMC customer engineer (CE) should discuss with the customer the need for validating AC power redundancy at each bay. If
the power redundancy requirements are not met in each bay, a Data Unavailable (DU) event could occur.
•
The customer should complete power provisioning with the data center prior to connecting power to the array.
•
The customer‘s electrician or facilities representative must verify that the AC voltage is within specification at each of the power
drops being fed to each product bay.
•
All of the power drops should be labeled to indicate the source of power (PDU) and the specific circuit breakers utilized within each
PDU:
○
Color code the power cables to help achieve redundancy.
○
Clearly label the equipment served by each circuit breaker within the customer PDU.
•
The electrician or facilities representative must verify that there are two power drops fed from separate redundant PDUs prior to
turning on the array:
○
If both power drops to a bay are connected to the same PDU incorrectly, a DU event will result during normal data center
maintenance when the PDU is switched off. The label on the power cables depicts the correct connection.
•
The electrician should pay particular attention to how each PDU receives power from each UPS within the data center because it is
possible to create a scenario where turning off a UPS for maintenance could cause both power feeds to a single bay to be turned off,
creating a DU event.
•
The customer’s electrician should perform an AC verification test by turning off the individual circuit breakers feeding each power
zone within the bay, while the customer engineer monitors the LED on the SPS modules to verify that power redundancy has been
achieved in each bay.
One customer PDU should never supply both power zone feeds to any one rack of equipment.
AC power specifications
Table 21. Input power requirements - Single-phase, North American, International, Australian
Specification
North American 3-wire connection
(2 L & 1 G)
International and Australian 3-wire
connection
(1 L & 1 N & 1 G)
Input nominal voltage
200–240 VAC ± 10% L- L nom
220–240 VAC ± 10% L- N nom
Frequency
50–60 Hz
50–60 Hz
Circuit breakers
30 A
32 A
Power zones
Two
Two
Minimum power requirements per system
at customer site
PowerMax 2000: Up to two 30 A or 32 A single-phase line cords per power zone for each
system in a rack.
PowerMax 8000: Up to three 30 A or 32 A single-phase line cords per power zone.
a.
L = line or phase, N = neutral, G = ground
36
Power Cabling, Cords and Connectors
