MGE UPS Systems S3 - Manual (Page 33)

For safety and proper operation of the unit, including
maximum attenuation of electrical noise, suitable grounding
is required.
A separate grounding electrode conductor
should be connected from the ground (GND) terminal to a
nearby grounding electrode, and should be sized per
National Electrical Code Article 250-94.
The grounding
electrode should be grounded structural metal, a metal water
pipe, or a suitable ground rod (National Electrical Code,
Article 250-26). The grounding electrode should be as near
as possible to the unit.
After the inverter assembly has been attached to the rack,
remove the Inverter module from its receiver cabinet using
the two thumb screws and perform the following steps See
Figure 2-2A and Figure 2-2B.
2.5.4 Inverter Connection
2.5.3 Grounding
86-153061-00 2 — 5 Installation and Operation
Owner’s Manual