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AC Power and Grounding
If the circuit is properly grounded, the ye
turn on.
2 Unplug the circuit tester.
low and white
lights on the tester
Using
a Volt-Ohm Milliammeter (VOM)
1
Set the VOM to the lowest scale on which you can read 130 V AC.
2 Measure 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\
Neutral
Phase
(HOT)
Ground
Less than
1.0 Volt AC
110-125
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
customer to have a
wired-
do not install the system.
Advise the
licensed electrician correct the problem.
Installing the Control Unit 2-9