Fluke 5520a Operator's Manual page 22

Rear Panel (cont)
G
To avoid shock hazard, connect
the factory supplied three-
conductor line power cord to a
properly grounded power outlet.
Do not use a two-conductor
adapter or extension cord; this
will break the protective ground
connection.
Use the rear-panel ground
terminal for a protective
grounding wire if there is any
question as to Calibrator earth
grounding.
CHASSIS GROUND
Internally grounded to the chassis.
H
AC Power Input Module
Provides a grounded three-prong connector
that accepts the line power cord, a switch
mechanism to select the operating line
voltage, and a line power fuse.
Warning
20