Section 1 - SERVICE ENTRANCE AND TERMINATION - OUTSIDE PLANT |
This section provides the necessary
guidelines to install service entrances to buildings and
information for the termination of cables entering buildings.
Topics addressed are voice, data and video.
plant voice, data, video cabling, communication conduits and
manholes, shall be designed and/or approved by the University's
- 1.2.1 GENERAL
Prior approval and coordination
with Telecommunications Center, and concerned parties is necessary
when the situation requires pulling cable through any
All cables associated with campus telecommunication networks (telephone, data, LAN, WAN,
campus TV, and fiber optics) shall be connected and disconnected
by Telecommunications Center or its designee.
All trunk cables requiring splicing will be done in accordance with current
industry standards. Project specifications will indicate who will
be responsible for supplying and installing trunk cabling and
There shall be no cable with voltages
higher than 90 volts AC in communications duct banks.
Note: Hard-line coax cable for backbone CATV networks
may carry voltage as high as 90 VAC.
All twisted pair
cables entering a building shall be terminated on protection
blocks. Only gas and solid state protectors shall be used. See
specifications in Section 5. Project specifications will indicate
who will be responsible for furnishing and installing protectors.
A grounding block will be provided at the telecommunications
backboard and connected to the main electrical ground for the
Repair or replacement of damaged cable is the
responsibility of the party involved in causing the damage.
Repairs or replacements will be done at no cost to the University.
All repairs to damaged cables must be approved by
Telecommunications Center. All damages shall be reported
immediately to Telecommunications Center. Facilities Planning and
Physical Plant shall also be notified for damages due to
activities of project contractors.
- 1.2.2 LABELING
All cables in each manhole
shall be identified by the cable number, cable type, number of
pairs and the termination point. The tag shall be made of plastic
or other such material designed to be used in such an application.
Whenever possible, all abandoned cable shall be removed
from tunnels, manholes and conduit. If it is not feasible to
remove abandoned cable, it shall be clearly tagged as abandoned,
with appropriate labeling as above, and shall be reported to
Telecommunications Center and Physical Plant.
- 1.2.3 AERIAL
Most university low voltage
structured cabling is underground. No aerial wiring shall be
installed on campus unless approved by the Telecommunications
Center, Facilities Planning, and Physical Plant. Information shall
be obtained from Telecommunications Center in reference to
ownership of aerial communication cables and poles.
- 1.3.1 GENERAL
Conduit sizing and quantities
between buildings shall be determined by Telecommunications Center
and will be communicated to Facilities Planning and Physical Plant
for inclusion in the project specifications. Minimum requirements
are outlined in the following paragraphs.
buildings shall be connected to the nearest manhole or new
Prior approval and coordination with
Telecommunications Center, Facilities Planning, and Physical Plant
and other concerned parties is necessary when the situation
requires any modification to the conduit system.
or replacement of damaged conduit is the responsibility of the
party involved in causing the damage and at no cost to the
University. All repairs to damaged conduits must be approved by
Telecommunications Center All damages shall be reported to
Telecommunications Center, Facilities Planning and Physical Plant
If an adjacent building is planned near
the new constructed or renovated building, communications
facilities should be placed from the main equipment room in the
new or renovated building to the exterior of the building on the
side of the adjacent building. Specifications will be the same as
those installed for the new or renovated building.
- 1.3.2 REQUIREMENTS
All new facilities or
renovations will be required to meet minimum requirements. Minimum
voice, data, and video conduit required for each building shall be
3 conduits. Whenever feasible, buildings larger than 200,000
square feet shall have two means of access to existing campus
One (1), two inch, Schedule 40, PVC, and
Two (2), four inch, Schedule 40, PVC.
more than the equivalent of 180 degrees of bends is allowed in a
run, including offsets.
A mule-tape with footage
markers shall be installed and tied off for each innerduct and/or
conduit. Mule-tape shall also be used for inside facilities and
- 1.3.3 UNDERGROUND
All underground conduit,
duct bank and raceways shall be steel reinforced, and concrete
(3500psi minimum) encased PVC. Additional reinforcement is to be
used when crossing roadways.
The minimum separation for
communications ducts and power ducts in a joint trench environment
is 3 inches (8 cm) of concrete, 4 inches (10 cm) of aggregate or
12 inches (30 cm) of well-tamped earth. All communications ducts
shall also be a minimum of 12 inches from steam pipes and
condensation lines if crossing perpendicular. The minimum depth
for buried conduit and ducts is 30 inches below grade or underside
of road bed to top of duct/conduit.
conduit, encased in reinforced concrete, shall be used in any
location subject to abuse, such as under slabs or foundations.
All necessary precautions shall be taken by the
contractor during construction to prevent the lodging of dirt,
plaster or trash in all conduit, tubing, flow duct, fittings and
boxes. All conduit in floors, concrete or below grade, shall be
swabbed free of debris and moisture before wires are pulled.
Conduits installed for inside plant type communications wiring are
not to be below grade where moisture can seep through pipes.
All diggings and excavation on the University of
Mississippi campus shall be approved by the Facilities Planning
and Physical Plant.
When pulling cable in existing
underground conduits, innerduct shall be installed to complete
filling the duct. The number of innerducts to be installed will be
based on the amount of space in the conduit. An empty conduit will
be required to have enough innerducts installed that fill the
conduit to complete capacity. All conduits and innerducts shall be
sealed. Sizing of innerducts is determined by the
Prior to pulling cable in
existing underground conduits, innerduct shall be installed first.
The number of innerducts to be installed will be based on the
amount of space in the conduit if there is cable already present.
An empty conduit will be required to have enough innerducts
installed that fill the conduit to complete capacity. All conduits
and innerducts shall be sealed.
- 1.3.4 CONDENSATION
Duct banks shall be
pitched to drain to manholes and away from building entrances.
- 1.3.5 TRAPS
All conduit, tubing, raceways,
ducts and duct banks shall be installed in such manner to insure
against collection of trapped condensation. Raceway runs shall be
arranged to be void of traps.
When conduit passes
through exterior concrete walls of any facility, the entrance
shall be watertight. Provide pipe sleeves in the concrete with 1/2
inch minimum entrance seal.
All conduits shall have
watertight connections and be sloped properly so they will drain
into the manhole and away from the building entrance.
- 1.3.6 TYPES
Gas pipe and water pipes shall
not be used for conduit under any circumstances.
types of conduit are accepted for underground conduit systems.
Project specifications will detail the types of conduit to be used
in the various locations covered by the project.
galvanized steel conduit with threaded fittings -- This conduit
shall be installed with reinforced concrete casing in areas
subject to abuse.
Schedule 40 PVC conduit -- This
conduit shall be installed with reinforced concrete casing. No PVC
conduit is acceptable without reinforced concrete.
duct envelope shall be rectangular in the cross section and be a
minimum concrete thickness of three (3) inches around any conduit.
The duct envelope shall be sized and placed as shown on
construction documents. ll conduit and ducts must be
terminated with bell ends at the manhole, facility or other
termination point. Where trench walls are unstable or the trench
width is wider than the envelope, the envelope shall be formed as
Duct spacers shall be provided at a maximum
of seven feet intervals. Conduit shall be anchored at three (3)
foot six (6) inch intervals and at each spacer to prevent duct
floating during concrete installation.
Each duct run
shall be done with a continuous concrete pour. Broken pours are
not allowed without written exception from University Planning,
Design, and Construction and provided #4 re-bar or larger is
extended twelve (12) inches beyond the end of the envelope at the
end of each day's pour and at all stub-outs.
- 1.4.1 GENERAL
Manholes shall not be smaller
than 7 feet wide, 7 feet long and 7 feet high.
maximum depth of all manholes shall be ten (10) feet from the
manhole cover to bottom of the manhole, unless otherwise approved
by Telecommunications Center.
The manhole cover and
opening shall be round, 36 inches in diameter and shall be
engraved with the word "Communications." Manhole covers shall not
have recessed handles that pull out when needed for removal.
Notched type covers shall be used. The manhole number shall be
assigned by Telecommunications Center or Physical Plant.
The maximum distance between manholes connected in any
one run shall not exceed 400 feet.
Pullboxes will be
used only with the agreement and permission of the
Telecommunications Center. Specifications will be provided to
installer on a per use basis.
- 1.4.2 INTERIOR
All materials used in a
manhole shall be resistant to corrosion. All steel shall be
galvanized or zinc coated. All racks in manholes shall be
galvanized or zinc coated steel.
Manholes shall have
pulling rings opposite to the conduit entrance on each wall.
- 1.5.1 GENERAL
Detailed diagrams can be
obtained from the University of Mississippi Department of Physical
Plant or Telecommunications Center if available. Refer any
questions specifically not addressed in this document to