Planning Guide

Electrical (AC) Power Planning 4-1
Chapter 4
Electrical (AC) Power Planning
4-
For information about planning appropriate AC electrical power for your
Express5800/320
Fc system, see:
• “Redundant Power Sources” on page 4-1
• “AC Power Service Requirements” on page 4-2
• “Power Outlet Requirements” on page 4-4
• “Connecting a System Directly to Two Separate Power Sources” on page 4-5
• “NEC-Supplied Power Cords” on page 4-6
Related Topics
• Chapter 5, “UPS Planning”
Redundant Power Sources
Express5800/320Fc systems require at least two separate and independent AC
power sources–an A-side power source and a B-side power source–that provide
power to the system’s power receptacles, labeled, respectively, A and B. Either source
must be capable of continuing to provide power if power to the other source is lost.
The A-side power source provides power to components that do not require two
sources of power: a KVM switch. If you use an uninterruptible power supply (UPS), the
UPS is the A-side power source.
The B-side power source provides power to the other side of each system.
The wattage required from the A-side power source will always be equal to or greater
than the wattage required from the B-side power source.