Sample Pdu Usage Calculation; Table 7-3. Sample: Current And Rack-Space Requirements; Table 7-4. Sample: Calculating A-Side Pdu And Rack-Space Requirements - NEC Express5800/320Ma Planning Manual

Sample PDU Usage Calculation

Sample PDU Usage Calculation
Table 7-3 shows how to use the information from
when the PDU is connected to a NEMA L6-20R receptacle in the United States, with a
power voltage of 208V.

Table 7-3. Sample: Current and Rack-Space Requirements

Component
Express5800/320Ma Dual-Core
system
KVM switch
Table 7-4 and the explanation which follows show how to use the information from
Table 7-3 to determine when you need to buy an additional pair of PDUs or calculate
the size and number of cabinets you need.

Table 7-4. Sample: Calculating A-Side PDU and Rack-Space Requirements

1. Component
PDU pair
Express5800/320Ma 3.2 GHz, 3.6
GHz, or Dual-Core system
KVM switch
Express5800/320Ma 3.2 GHz, 3.6
GHz, or Dual-Core system
PDU pair
Express5800/320Ma 3.2 GHz, 3.6
GHz, or Dual-Core system
Express5800/320Ma 3.2 GHz, 3.6
GHz, or Dual-Core system
In this calculation, components were added one by one, calculating:
•
The total current demanded by the components
•
The total space used in the rack
•
The total number of outlets required
7-4 Express5800/320Ma: Site Planning Guide
Table 7-1
Watts
650
20
2. Cumulative
Space Used (U) A-Side Outlets
2
6
8
15
19
23
29
to calculate the current
Current Rack Space
3.91A 4U
0.12 1U
3. Cumulative
Number of 4. Cumulative
Current (A)
0
1
3
5
0
1
3
0.00
3.91
4.15
11.06
0
3.91
9.62