Panasonic KX-TD500 Installation Manual page 81

3.
Move one of the meter probes to the 3rd prong terminal (GND).
Either the same reading or a reading of 0 volt should be obtained.
4.
If a reading of 0 volt at one terminal and a reading of 108 V AC to 132 V AC at the other
terminal is not obtained, the outlet is not properly grounded.
This condition should be corrected by a qualified electrician (per article 250 of the National
Electrical Code).
5.
If a reading of 0 volt at one terminal and a reading of 108 V AC to 132 V AC at the other
terminal is obtained, then set the meter to the "OHMS/RX1" scale, place one probe at the
GND Terminal and the other probe at the terminal which gave a reading of 0 volt.
A reading of less than 1 ohm should be obtained. If the reading is not obtained, the outlet is
not adequately grounded. See qualified electrician.
Installation Manual
Installation
81