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Smart Infrastructure
LMV6 Installation Guide
CC1J7560en
8 Earthing and shielding of the LMV6
4/21/2020
8.3 Protective earth (PE) and functional earth (FE)
Figure 21: Protective earth (PE), functional earth (FE)
P
rotective
E
arth (PE):
Protective earth (PE) is a device earthing conductor that avoids hazards by keeping the
exposed conductive surfaces of a device at ground potential.
To avoid a potential voltage drop, there should be no current flowing through this
conductor under normal circumstances.
F
unctional
E
arth (FE):
Functional earth (FE) is not designed to protect against electric shock – it is used to
establish a common reference potential.
