MI 3108 EurotestPV
Measurements
– a.c. LV installations
67
5.10 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. An often reason for this fault is incorrect wiring (see examples below).
When touching the TEST key in all functions that requires mains supply the user
automatically performs this test.
Examples for application of PE test terminal
Figure 5.41: Reversed L and PE conductors (tip commander)
L1
N
Reversed phase and
protection conductors!
MOST DANGEROUS
SITUATION!
PE
L
PE
N
L/L
1
N/L2
PE/L3
Figure 5.42: Reversed L and PE conductors (application of 3-wire test lead)
