Determining Pdu Requirements; Table 7-1. Current And Rack-Space Requirements - NEC Express5800/320Ma Planning Manual

Determining PDU Requirements

Use the information in
configuration for your Express5800/320Ma system.
on page 7-4
configuration.
Determining PDU Requirements
Using the nominal voltage rating of the power receptacle at your site and the total
wattage of the components that will draw power from the A-side PDU, complete the
information in Tables
that the Express5800/320Ma 3.2 GHz, 3.6 GHz, and Dual-Core systems and
rack-mounted components will draw and whether you need a second pair of PDUs.
To complete
1. Obtain the voltage available at your location. Consult a facilities manager at your
site to make sure you know the correct voltage.
2. For each type of component you plan to place in the rack, calculate the required
current, as follows: Divide the wattage of the element, listed in the Watts column of
Table 7-1, by the voltage available at your site. Multiply the result by 1.25 and enter
the value in the Current column.

Table 7-1. Current and Rack-Space Requirements

Component
Express5800/320Ma 3.2 GHz, 3.6
GHz, and Dual-Core
KVM switch
7-2 Express5800/320Ma: Site Planning Guide
N O T E S
1. Connect each PDU to a separate AC power source.
2. Install a maximum of two pairs of PDUs in a rack.
"Determining PDU Requirements" on page 7-2
shows how to use the information you gather for planning the rack
7-1 and 7-2. This information will help you determine the current
Table 7-1
"Sample PDU Usage Calculation"
Watts Current
650
20
to plan the rack
Rack Space
4U
1U