Chapter 2: Safety and Regulatory
5495975-1EN Rev.9 2-30
© 2013-2017 General Electric Company. All rights reserved.
Ground
Table 2-14 describes the different types of grounding used in your system.
Table 2-14 Ground types
Symbol Description
Functional Earth (ground) Terminal indicates a terminal directly connected to a
point of a measuring supply or control circuit or to a screening part, which is
intended to be earthed for functional purposes.
Noiseless (clean) earth (ground) identifies any terminal of a specially designed
earthing system where noise from earth of leads will not cause a malfunction of
the equipment.
Protective earth (ground) identifies any terminal which is intended for
connection of an external protective conductor to protect against electrical
shock in case of a fault.
Frame or chassis identify the frame or chassis terminal.
Equipotentiality identifies terminals that bring the various parts of equipment or
systems to the same potential when connected together. These terminals are
not necessarily at earth (ground) potential. The value of the potential may be
indicated next to the symbol.
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