Phone company is requiring a ground bus bar in their room. Does this bus bar need to be wired back to the ground bus bar of the main switchboard(phone room and switchboard are on the same level) ? Or can I wire it back to the water meter where there is a a gnd wire and is closer to the telephone room or can I wire it back to the ground bar of the panelboard which will be powering the receptacles in the new telephone room?
telecommunications ground bar
- Thread starter bwyllie
- Start date
- Status
Cavie
Senior Member
- Location
- SW Florida
It must go back to "Service disconect"
mdshunk
Senior Member
- Location
- Right here.
The phone ground bar is referred to as a P.A.N.I. bar. There is a specific order that the grounds are to be connected to this bar, believe it or not. The bar is segmented into 4 sections; Producers, surge Arrestors, non-isolated, and isolated (PANI) ground conductors. The line to the service equipment is to connect to the "P" section of the bar. This is to keep the "flow" from interfearing with the more sensitive ground. I have no idea if this works or not, but if they're paying, I'm installing.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Cavie said:
Got a code article for that requirement?
mdshunk
Senior Member
- Location
- Right here.
I was sorta thinking the same thing. The last one I did, for Embarq, they required that it only go back to the panel that served the telecom equipment. You can see from my close up pic that the one in the picture goes to the ground loops, building steel, the panel that serves the equipment, and the service equipment. I think this is a spec thing and not a code thing, but I have no idea. Such installations are generally engineered, and I just install them per spec. It will be interesting to learn if there is code that applies here.infinity said:
Well I design TELCO CO power systems and I have to ask a dumb question here.
Why on earth is the phone company leaving it to your discretion as to where to terminate the ground bar? Every little detail should be very specified including cable insulation, size color, type of compression connector, routing, etc.
More needs to be known to answer the question like is this on an upper floor of a high rise, ground level, how is it being used, DC power plants being used, Isolated Ground Planes involved.
What the bar is called depends on the nomenclature the particular phone company uses and how the bar is intended to be used. Like for one is there a COGB (Central Office Ground Bar) already present in the building. If so, that is where it would be terminated providing it is a single story or ground level..
My advice is to make the phone company specify where and how it is to be terminated. Trust me, whatever you do will be wrong if left to your own devices.
Why on earth is the phone company leaving it to your discretion as to where to terminate the ground bar? Every little detail should be very specified including cable insulation, size color, type of compression connector, routing, etc.
More needs to be known to answer the question like is this on an upper floor of a high rise, ground level, how is it being used, DC power plants being used, Isolated Ground Planes involved.
What the bar is called depends on the nomenclature the particular phone company uses and how the bar is intended to be used. Like for one is there a COGB (Central Office Ground Bar) already present in the building. If so, that is where it would be terminated providing it is a single story or ground level..
My advice is to make the phone company specify where and how it is to be terminated. Trust me, whatever you do will be wrong if left to your own devices.
mdshunk
Senior Member
- Location
- Right here.
That has been my experience, with reference to these. Yeah, like all three of them that I've ever done in my life. :grin:dereckbc said:
- Status