AT&T 3.0 manual Unplug the circuit tester, Measuring the AC Outlet Voltages

AC Power and Grounding

If the circuit is properly grounded, the ye low and white lights on the tester turn on.

2 Unplug the circuit tester.

Using a Volt-Ohm Milliammeter (VOM)

1 Set the VOM to the lowest scale on which you can read 130 V AC.

2Measure the AC outlet voltages. See Figure 2-2.

■Phase to ground should be 110 to 125 V AC.

■Neutral to ground should be less than 1 V AC.

■Phase to neutral should be 110 to 125 V AC.

110-125 / Volts AC\

Phase

Neutral ( H O T )

	Ground
Less than	110 - 125
1.0 Volt AC	Volts AC

Figure 2-2. Measuring the AC Outlet Voltages

WARNING:

If the voltage readings do not measure the values required, the AC outlet is improperly wired- do not install the system. Advise the customer to have a licensed electrician correct the problem.

Installing the Control Unit 2-9