|
|
Joined: Jan 2004
Posts: 226
Member
|
OP
Member
Joined: Jan 2004
Posts: 226 |
I just installed a RG-11 cable from one building to another. One side will be connected to the circuit providers Demarc and the other to an MDF closet. The circuit side will be grounded on the Demarc. Do I also need to ground on the MDF side? If so, is there a coupler I can use that has a grounding screw or something to connect to the MDF ground bar? Thanks in advance.
|
|
|
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.
|
|
|
|
Joined: Dec 2002
Posts: 9,424 Likes: 1
Member
|
|
Member
Joined: Dec 2002
Posts: 9,424 Likes: 1 |
They will probably just put in a ground block where the coax comes in.
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
|
|
|
|
|
Joined: Dec 2004
Posts: 1,106
Member
|
|
Member
Joined: Dec 2004
Posts: 1,106 |
Trump 2020
Proud 1 star member.
|
|
|
|
|
Joined: Dec 2002
Posts: 9,424 Likes: 1
Member
|
|
Member
Joined: Dec 2002
Posts: 9,424 Likes: 1 |
Yes, that is what they normally install, at least around here. I have one where the underground cable comes in and the drop cable to the splitter connects.
However, I am not sure how it is done with an aerial run between buildings. Ed would be your best source of information.
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
|
|
|
|
|
Joined: Feb 2005
Posts: 12,344 Likes: 3
Member
|
|
Member
Joined: Feb 2005
Posts: 12,344 Likes: 3 |
By code it's supposed to be grounded with one of those ground blocks where it enters each building. Unfortunately that can cause the coax to carry a part of the electrical neutral current since it is essentially in parallel with the neutral conductor running between the buildings or out in the street.
This may or may not be a problem.
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
|
|
|
|
|
Joined: Jan 2004
Posts: 226
Member
|
|
OP
Member
Joined: Jan 2004
Posts: 226 |
Yea, thats what I was looking to find. Thanks
|
|
|
|
|
Joined: Jun 2007
Posts: 356
Member
|
|
Member
Joined: Jun 2007
Posts: 356 |
The "ground potential" refers to how well each buildings ground is grounded.
If building A has a 5 ohm ground and building B is 1 or 2 ohms, your cable may become a ground path for for building A, with current seeking its path of least resistance to ground.
Be very aware of your "ground potential" before grounding BOTH sides of the cable to biuilding ground.
it's all tip and ring
|
|
|
|
|
Joined: Sep 2006
Posts: 3,290
Member
|
|
Member
Joined: Sep 2006
Posts: 3,290 |
I have a similar question concerning a house I'm working on. The garage, which has one door opener, one 220V heater, three light switches and some lamp fixtures, is fed from the main house via a buried Romex 12-2 w/GRD. There is no sub-panel, no ground rod, no building bonding point, no nuttin'.
To what do I bond my coax and 6-pair telephone buried wire? Do I create the building ground, by sinking my own ground rod(s)? Does that change the electrician's responsibility to install a ground rod?
It is my interpretation of the NEC that an outbuilding with three or fewer electrical circuits (in this case, one) does not need a sub-panel or a ground rod. So that's what the electrician must have reasoned, too.
Any thoughts?
Arthur P. Bloom
"30 years of faithful service...15 years on hold"
|
|
|
|
|
Joined: Dec 2002
Posts: 9,424 Likes: 1
Member
|
|
Member
Joined: Dec 2002
Posts: 9,424 Likes: 1 |
How do you have a 220v outlet running off a 12/2 cable. That is pretty scary.
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
|
|
|
|
|
Joined: Dec 2005
Posts: 2,928
Member
|
|
Member
Joined: Dec 2005
Posts: 2,928 |
Jeff you can do it..no neutral is used.
I Swear I did not touch anything 
|
|
|
|
Forums84
Topics94,306
Posts638,894
Members49,771
| |
Most Online5,661
May 23rd, 2018
|
|
|
0 members (),
71
guests, and
32
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
|
