Page 78 of 456 Installing AC power
Systems that use reserve power plug into the UPS, which in turn plugs into the power source (associated batteries can be located within the UPS or installed externally). Consult the UPS documentation for receptacle requirements.
As a safety precaution, all AC service panels should be located in an area that is easily accessible at all times to allow for emergency shutdown. An optimal location would be near, or just outside the entry to the room containing the Large System (or the UPS, if equipped). Each circuit breaker in the panels should be clearly marked to identify the system component or components it services.
Safety ground/protective earth and logic return wiring
A separate safety ground/protective earth connection is required. The safety ground/protective earth wire must be #6 AWG or larger. It must connect the pedestal to the
An AC equipment ground (ACEG) bus in the service panel or transformer is acceptable but not recommended. If used, the ACEG bus conductor must be a low impedance path to an approved source for ground. It must not contain induced electrical noise from sources such as building metallic structures (building steel, metallic conduit, metal pipes, etc.). Figures 25, 26, and 27 beginning on page 79 show an ACEG as the
Depending on the distances between columns, the location of the service panel, and the availability of panel SPG connection points, safety ground/ protective earth wiring can be
Note: Refer to Communication Server 1000M and Meridian 1:
Large System Planning and Engineering
