CIE-A-200 Control Panel Engineering and Commissioning Manual
65
Loop Continuity and Insulation Test Results
After installation of the cable, and termination into all the relevant back-boxes, ensure that the link pins (legacy
devices only) are installed as necessary in order to be able to take cable continuity and insulation readings.
Make sure that all the cables are dressed smoothly and neatly into their back-boxes in order that they will not
be disturbed after the readings are taken.
The commissioning engineer will require these readings, along with correctly marked ‘as-wired’ drawings and
completed configuration sheets, before attending site to commission the system.
CORE
CONTINUITY READING (OHMS)
LE1 +ve to LE2 +ve
LE1 -ve to LE2
–ve
LE1 Scrn to LE2 Scrn
A reading of approximately 1.2 ohm per 100 metres of 1.5 mm
2
cable is expected and any significant variation
from this should be investigated. If the above readings are satisfactorily showing circuit continuity then you
may also take the reading below.
CORE
INSULATION READING (OHMS)
+ve to -ve
+ve to Screen
-ve to Screen
Loop Screen to Mains
Earth
No continuity between cores should be seen and a reading of OL should be shown on the test meter. Any
significant variation from this should be investigated. If the readings are satisfactory then the loop wiring is
largely proven other than for faults such as complete polarity reversal.
Site Name & Address:
Installation Company:
Testing Engineer:
Signature:
Date:
