SILENT KNIGHT 9800 Spécifications Page 31

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Model 9800 Central Station Receiver Installation/Operation Manual
3-16 151018
3.9.2 How to Verify Earth Ground
To verify earth ground at the AC outlet the 9800 receiver is powered from, use the following
steps:
1. Measure the AC voltage between the center ground post and each side of the outlet (see A
& B in Figure 3-12). You should read approximately 120 VAC (or 240VAC for 240VAC
circuits) at measurement point B and nominal VAC at measurement point A.
Figure 3-12 Outlet Voltage Measurement Points
2. Measure the voltage between the two slotted holes. It should be equal to the voltage
reading at measurement point B. (See Figure 3-12.)
If these voltages are not equal, the outlet does not have a proper earth ground.
3. Ground the outlet by running a wire (18 gauge or higher) to a good earth ground.
The wire should be of equal or greater diameter to the wires used to feed the outlet. It may be
necessary to have a licensed electrician ground the outlet.
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