Installing the Control Unit

Less than 2 . 5 Volts

110 - 125 Volts

N e u t r a l

P h a s e

( H O T )

 

G r o u n d

110 - 125

Volts

Figure 2-2. Measuring the AC Outlet Voltages

Phase to ground should be 110 to 125 VAC.

Neutral to ground should be less than 1 VAC.

Phase to neutral should be 110 to 125 VAC.

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.

2-10Power and Grounding

Page 49
Image 49
AT&T Release 2.0 manual Measuring the AC Outlet Voltages