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There are 3 types of telecommunication earthing systems allowed by the ACIF.
- CES – Communications Earth System
- TRC – Telecommunications Reference Conductor
- D.d. Earth – DC Supply Earthing.
Earthing within telecommunications network serves two functions.
- Functional (means the protective earth provides a function)
- Protection (purely a safety conductor ie: lightening strike)
Earthing System |
Functional |
Protective |
Conductor Colour |
CES |
Yes |
Yes |
Green / Yellow |
TRC |
Yes |
No |
Violet |
d.c Earth |
Yes |
No |
See AS 3015 |
With regards to (Size) & (Resistance) of each:
Earthing System |
Conductor Size |
Resistance |
CES |
6.0 mm & 2.5 mm |
1 ohm |
TRC |
4.0 mm |
5 ohm |
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| TRC Configuration | CES Configuration |
This page was last modified on 21 January 2010 and maybe out of date with regards to newer practices at the time of reading this article |
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