Instruction manual

AC Power and Grounding
2-11
Installing the Control Unit
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.
Grounding Requirements 2
Proper grounding of the installation site safeguards the system by protecting it
from the following:
■ Lightning
■ Power surges
■ Power crosses on central office trunks
■ Electrostatic discharge (ESD)
Less than
1.0 Volt AC
Neutral
Phase
(HOT)
Ground
110 - 125
Volts AC
110 - 125
Volts AC