Cable installation – who’s responsible for what

MeatSim · 11th August 2003, 11:06 PM

I know there are many rules for installing network cable but I’ll just use one as an example.
(I’m talking about cables going though walls)
"Network cable isn’t allowed to directly touch power cables, there must be shielding between the too" -or something like that

But whose responsibility is it? I understand that if the network cable were put into an existing building then it would be the cabler’s job to shield it. But if it’s going into a new house and the network cabling was put in first then the power. If cables where to cross is it the sparkies job to shield the too?

caspian · 11th August 2003, 11:51 PM

Theoretically I suppose the cable installed takes precedence, but I can see the sparky being a bit of a law unto himself there. Could cost you a bit to insist on it.

MeatSim · 12th August 2003, 7:20 PM

personally i don't care if it's there or not. All i care about is that it doesn't come back on me cos i put it there first

c3po · 12th August 2003, 9:49 PM

Quote:

Originally posted by MeatSim
"Network cable isn’t allowed to directly touch power cables, there must be shielding between the too" -or something like that

Ok,

Unless you are running power over a 'bare copper earth' or something similarly stupid, you will more than likely have two if not more sheaths of sheilding on your power cables.
Likewise, data cables are blessed with at least two sheaths (and sometimes more) of shielding.

It really surprises me that you could honestly believe that the two must never cross, and if they ever need be... well...

My friend... the job is already done for you...

The regulation is quite simple, 240V power must never enter a data circuit....
You cannot run data parallel to power ie. through conduit, or side by side in cable trays. It is not the fact that 240V might enter the data circuit..... it is the risk of power induction, and the potential foreign voltage which will destroy data equipment..

schcp001 · 20th August 2003, 11:30 PM

yeah and to add they can cross over but its a regulation to put a bridge between the 2. ie a block of wood. also they can run parallel, not in same conduit, but avoid running parrallel at close proximity for more than a meter.

otherwise there is no such thing as installing "shielding" the cable is alredy shielded. and twisted pair data cabling provides its own EM shielding by the pairs being twisted to gether in such a way.

schcp001 · 20th August 2003, 11:36 PM

Ahh dude! put the network cable in last! ..........the sparkies cabling takes precedence in a new place. Otherwise you might find urself putting ports where electrical outlets are meant to go. also dont run ur comms cable in the same cavity as the 240v cable. that is a regulation. its good to go either side of the stud though if they need to be next to each other (power n data/comms)

11th August 2003, 11:06 PM	#1
MeatSim Member Join Date: Aug 2003 Location: Kingsgrove Posts: 24	Cable installation – who’s responsible for what I know there are many rules for installing network cable but I’ll just use one as an example. (I’m talking about cables going though walls) "Network cable isn’t allowed to directly touch power cables, there must be shielding between the too" -or something like that But whose responsibility is it? I understand that if the network cable were put into an existing building then it would be the cabler’s job to shield it. But if it’s going into a new house and the network cabling was put in first then the power. If cables where to cross is it the sparkies job to shield the too? __________________ meh!

12th August 2003, 7:20 PM	#3
MeatSim Member Join Date: Aug 2003 Location: Kingsgrove Posts: 24	personally i don't care if it's there or not. All i care about is that it doesn't come back on me cos i put it there first __________________ meh!

20th August 2003, 11:30 PM	#5
schcp001 Member Join Date: Dec 2002 Location: Adelaide Posts: 315	yeah and to add they can cross over but its a regulation to put a bridge between the 2. ie a block of wood. also they can run parallel, not in same conduit, but avoid running parrallel at close proximity for more than a meter. otherwise there is no such thing as installing "shielding" the cable is alredy shielded. and twisted pair data cabling provides its own EM shielding by the pairs being twisted to gether in such a way. __________________ Artslet SDE

20th August 2003, 11:36 PM	#6
schcp001 Member Join Date: Dec 2002 Location: Adelaide Posts: 315	Ahh dude! put the network cable in last! ..........the sparkies cabling takes precedence in a new place. Otherwise you might find urself putting ports where electrical outlets are meant to go. also dont run ur comms cable in the same cavity as the 240v cable. that is a regulation. its good to go either side of the stud though if they need to be next to each other (power n data/comms) __________________ Artslet SDE Last edited by schcp001; 20th August 2003 at 11:41 PM.

11th August 2003, 11:51 PM	#2
caspian Member Join Date: Mar 2002 Location: Melbourne Posts: 6,112	Theoretically I suppose the cable installed takes precedence, but I can see the sparky being a bit of a law unto himself there. Could cost you a bit to insist on it.