Fiber Optic cable with CCTV power cable & with 11 kV power cable
Fiber Optic cable with CCTV power cable & with 11 kV power cable
(OP)
Dear all,
I received a query on site based on design drawings. The design drawings are for CCTV site network & 11 kV power cables network (in Doha, Qatar).
1- The CCTV design drawings show a detail that mention the following:
- "Details of CCTV power and fiber optic cable trench in shared path" ; in which one 150mm uPVC duct only is drawn.
2- The 11kV cabling site network design drawings show details in all of which the following is mentioned:
- "Details of ducts of concrete encased 11kV+fiber optic cable"
The query of the contractor: Can the 11kV power cbales pass along with the fuber optic cables just like in CCTV detail??
My question also: if yes, isn't there any fear of noise on the signal(s) that can be carried on fiber opic cables??
Thank you in advance for your replies, hope to be referenced with codes/standards references.
Yours,
M.A.Salah
I received a query on site based on design drawings. The design drawings are for CCTV site network & 11 kV power cables network (in Doha, Qatar).
1- The CCTV design drawings show a detail that mention the following:
- "Details of CCTV power and fiber optic cable trench in shared path" ; in which one 150mm uPVC duct only is drawn.
2- The 11kV cabling site network design drawings show details in all of which the following is mentioned:
- "Details of ducts of concrete encased 11kV+fiber optic cable"
The query of the contractor: Can the 11kV power cbales pass along with the fuber optic cables just like in CCTV detail??
My question also: if yes, isn't there any fear of noise on the signal(s) that can be carried on fiber opic cables??
Thank you in advance for your replies, hope to be referenced with codes/standards references.
Yours,
M.A.Salah






RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
Regards
Marmite
RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
Yes, the contractor was asking about passing through the same duct.
I couldn't get the meaning of your phrase "take out the fiber" ...
To recheck my understanding, Is your point of view is that, it is wrong for the following reasons:
1- A fault in the 11 kV power cable may cause a fault in the fiber optic cable adjacent with it.
2- If we tried to pull the power cable, the fiber optic cable will be trapped.
Or you mean only one point, that if a fault happened to the 11 kV power cable and you needed to pull it, the fiber optic one will be trapped & damaged (i.e. no fault will be transferred to the fiber optic cable, only trapping and damage)...
Thank you for clarification.
RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
If you try to pull out the 11kV cable there is a possibility of damaging the fibre.
When cables are installed in ducts they do not necessarily sit neatly in the bottom of the duct, as shown on duct section drawings. In reality the cables snake in the duct, especially around bends, meaning that the smaller cable can easily get trapped against the duct wall by the larger cable.
Regards
Marmite
RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
Bill
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"Why not the best?"
Jimmy Carter
RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
RE: Fiber Optic cable with CCTV power cable & with 11 kV power cable
Bill
--------------------
"Why not the best?"
Jimmy Carter