Ch. 7 * (Telecommunications Spaces) Flashcards
Telecommunications Room (TR)
Architectural space
Equipment Room (ER)
Environmentally controlled
Entrance Facility (EF)
OSP
Loud equipment should be located ___ the telecommunications space
Outside
Sleeves/slots should be located on the ___ side of the room
Left
Three types of steel conduit
Rigid metal conduit (RMC)
Intermediate metal conduit (IMC)
Electrical metallic tubing (EMT)
Except “black iron pipe”
EMT
Thin wall
EMT is the ___ weight steel conduit
Lightest
At least ___ 4” conduits should serve an ER, TR, EF
4
TRs on the same floor should be connected with at least ___ 3 inch conduit
1
Recommended door dimensions
3’ X 6.5’ - minimum
Double door recommended (slide side to side or removable)
Used to reduce static electricity
Antistatic floor tile
ER power provisions
Two dedicated duplex receptacles on individual circuits
HVAC should run
24 hours a day/365 days a year
Temperature of room that does not contain active equipment
95°
Rooms with active equipment should be kept at ___
77° and 55% humidity
Interchange per hour for TR
1
Air change per hour for tunnel
3
Air change per hour for battery plant
4
___ should be kept close to the entrance of the telecommunications space
Fire extinguishers
Telecommunication spaces should be located away from ___
Threats of flooding
Minimum lighting
50 foot-candles
Building less than 5000 sq’
Shallow room
Building less than 1000 sq’
Cabinet
Wall field sizing
4 sq” / balanced twisted-pair 4-pair circuit
2 sq” / optical fiber strand
Wire management spacing
5-6” above and below connecting hardware
Corners result in ___ of lost space
12”
Standard for racks, cabinets or enclosures
(ANSI/CEA) 310-E
TR’s and TE’s differ from ERs and EFs how?
They serve tenants as opposed to buildings or campuses
TRs or ERs should be located on every ___
Floor
One TR or ER for every ___ square feet
10,000
A full-size TR can support ___ 4-pair cables
480
A small TR can support ___ 4-pair cables
240
How many square feet does this room serve (2 racks)?
Less than 5000 sq’
TE doors may be?
Hinged or removable
TE service area
3,600 sq’
ERs should be located in the ___
Center
255 work areas
55 BAS devices
ER size ___
205 sq’
Typical equipment cabinets require ___ of floor area and ___ working clearance
10 sq’ & 10 sq’
Recommended cable pathways entering TR
(4) 4” + spare if over 40,000sq’
Cable pathways entering ER
(5) 4”
Cable pathways entering EF
(5) 4” + (3) 2”
ER temperature
77°
ER humidity
55%
ER heat dissipation
5000 BTUs (British Thermal Unit)
HVAC sensors/controls located @ ___ AFF
5’
MC / HC
Main Crossconnect / Horizontal Crossconnect
The MC should be located ___
Close to the ER / center of building
Size of TR
5000 sq’ - 8’ x 10’
5000-8000 sq’ - 9’ x 10’
8000-10,000 sq’ - 10’ x 11’
TE power requirements
1 outlet
Standard working height means ___
No scaffold or ladder req’d
Avoid placing the TR near ___
Kitchens
Bathrooms
Janitor closets
Color code for 4”, 5” & 6” conduit thread protectors
Blue
___ protect telecommunications systems from contaminants
Positive room pressure
Vapor barriers
Absolute filters
Recommended space height for rack, cabinet or enclosure
7.5’
ER minimum size
10’ x 16’
Allow ___ more space for routing of cables, jumpers and patch cords
20%
Color code for 1”, 2” & 3” conduit thread protectors
Orange
If usable space is unknown, deduct ___ % of the total floor area to estimate usable floorspace
15%
Telecommunications Enclosure (TE)
Case
