MI 3101 EurotestAT: Measurements
PE test terminal
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5.9 PE test terminal
It can happen that a dangerous voltage is applied to the PE wire or other accessible metal
parts. This is a very dangerous situation since the PE wire and MPEs are considered to be
earthed. A common reason for this fault is incorrect wiring (see examples below).
When touching the TEST key in all functions that require mains supply the user
automatically performs this test.
Examples for application of PE test terminal
L1
N
PE
Reversed phase and
protection conductors!
T
MOST DANGEROUS
SITUATION!
HE
Figure 5.40: Reversed L and PE conductors (application of plug commander)
L1
N
Reversed phase and
protection conductors!
MOST DANGEROUS
SITUATION!
PE
L
PE
N
L/L
1
N/L2
PE/L3
Figure 5.41: Reversed L and PE conductors (application of universal test cable)
