3Com 3C13751 Getting Started Manual page 28

28 Chapter 2: Installation
Figure 11 AC Power Connector
(1) Power switch (2) AC input receptacle
Recommended power outlet
The user is recommended to use a single-phase 3-core outlet with a
neutral point or a multi-functional computer power socket. The neutral
point of the outlet should be grounded reliably. Normally, the neutral
point of the power supply system in a building is buried in the ground
during the construction and cabling. The user must make sure that the
power supply for the building is grounded before connecting the AC
power cord.