HT instruments SIRIUS87 - Manual (Page 73)

SIRIUS 87
EN - 71
11. APPENDIX
11.1. LOW : CONTINUITY MEASUREMENT ON PROTECTIVE CONDUCTORS
Purpose of the test is to check the continuity of:
a) protective conductors (PE), main equalizing potential conductors (EQP), secondary
equalizing potential conductors (EQS) in TT and TN-S systems.
b) neutral conductors having functions of protective conductors (PEN) in TN-C system.
NOTE: This test is to be preceded by a visual check verifying the existence of yellow-
green protective and equalizing potential conductors as well as compliance of the
sections used with the standards’ requirements.
INSTALLATION PARTS TO BE CHECKED
Examples for continuity measurement on conductors
Check the continuity among:
a) earth poles of
all the plugs and earth collector or node.
b) earth terminals of class I instruments (Boiler etc.) and earth collector or node.
c) main external masses (water, gas pipes etc.) and earth collector or node.
d) auxiliary
external masses to the earth terminal.
Connect one of the
test lead to the
external mass (in
this case the water
pipe) and the other
to the earth
installation using
for example the
protective
conductor of the
closest FM socket.
Connect one of the
test lead to the
protective
conductor of the
FM socket and the
other to the
equalising potential
node of the earth
installation.