6.2 Main Power Board Connections
1. Installing a temporary ground for ESD protection: With all circuits de-energized,
connect a temporary protective earth ground connection for ESD protection.
Prior to performing any unit wiring, be sure to discharge any static on your per-
2. Installing the Class 320 protective earth ground: Connect an earth ground wire
to the Class 320 (Type 1 enclosure) protective earth ground lug with a torque of
Failure to attach the protective earth ground wire securely to the meter creates
a potential shock hazard. Do not loosen or remove the screw securing the
Fig. 5. Main Power Board Connections.
CLASS 320 METER