AT&T Release 2.0 manual Connecting the Control Unit to an AC Outlet

Installing the Control Unit

Connecting the Control Unit to an AC

Outlet

CAUTION:

■Make sure the AC outlet has been tested for proper grounding by following the procedures earlier in this chapter under “AC Outlet Tests.” The outlet should be 177-VAC, 60-Hz, 3-wire (phase, neutral, ground).

■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 (752 cm) of the control unit.

Follow this procedure to connect the control unit to an AC outlet:

1.Turn the switch on the basic carrier’s power supply to the OFF position.

2.Turn off the power switches on the expansion carrier power supplies.

3.Unplug the power cords from any auxiliary power units.

4.Plug one end of the power cord into the AC IMPUT connector just below the power switch on the front of the power supply. Do this for each carrier.

5.Plug the other end of the power cord into the AC outlet. Aliow at least 1 ft (30.4 cm) of slack in the cord. Do this for each carrier.

CAUTION:

Do not attach the power cord(s) to any building surfaces.

2-62Connecting the Control Unit to an AC Outlet