AT&T 3.0 manual

AC Power and Grounding

Verify that all of the following power and grounding requirements are met:

The load center of appropriate current rating must be equipped with circuit breaker(s) labeled 120 VAC, 15 amps.

■Each breaker must protect one dedicated quad AC outlet or two dedicated duplex AC outlets.

■All AC outlets must connect to the same load center and the ground wire must connect to the single-point ground bar on the first AC outlet (see Figure 2-1).

One outlet must have an attached ground bar connected by a #6 AWG copper wire to an approved ground (see page 2-12 for a description of approved grounds). This ground bar is the system’s single-point ground (see Figure 2-1).

To prevent someone from accidentally shutting off the power, do not connect the control unit to a switch-controlled outlet.

The AC outlet should be within 5 ft. (152 cm) of the control unit.

Each carrier requires one AC outlet receptacle.

Auxiliary equipment requires additional AC outlets.

If a printer or PC is installed on the system, it must be plugged into the same AC branch as the power supply of the basic carrier.

If the printer or PC is 50 ft. (15 m) or more from the control unit, or is plugged into a different AC circuit, Asynchronous Data Units (ADUs) must be installed as well. Chapter 5, “Installing the PC, CAT, or Printer,” includes complete installation instructions.

The AC power requirements indicated in “AC Outlet Tests,” below, must be met.

2-6Installing the Control Unit