HomeMy WebLinkAboutT601CONDUCTOR SIZING
Recommended Sizing of the Telecommunications Bonding Backbone Conductor(TBBC) and Grounding
Equalizer (GE) per J- STD -607 -A
The TBBC, BC, and BCT shall be copper conductors. The TBBC shall be sized at 2 kcmil per linear foot of
conductor length up to a maximum size of a3 /0 AWG. The TBBC may be insulated. The Bonding conductor
for Telecommunications (BCT) and Bonding Conductor (BC) shall be, as a minimum, the same size as the
largest TBBC used.(1)
TBBC LENGTH
LINEAR M (FT)
LESS THAN 4 (13')
4 -6 (14 -20')
6 -8 (21 -26')
8 -10 (27 -33')
10 -13 (34 -41')
13 -16 (42 -52')
16 -20 (53 -66')
GREATER THAN 20 (66')
The TEBC minimum conductor size shall be a No. 6 AWG.
TBBC SIZE (AWG)
6
3
1
1/0
2/0
3/0*
*3/0 may not always be available. 4/0 is a more common size that may be substituted
(1). Telecommunications Industry Association, Commercial Building Grounding (Earthing) and Bonding
Requirements For Telecommunications, J- STD - 607 -A, October 2002.
ABBREVIATIONS
TR = TELECOMMUNICATIONS ROOM
BC = BONDING CONDUCTOR
TBBC = TELECOMMUNICATIONS BONDING BACKBONE CONDUCTOR
TEBC = TELECOMMUNICATIONS EQUIPMENT BONDING CONDUCTOR
TMGB = TELECOMMUNICATIONS MAIN GROUNDING BUSBAR
TGB = TELECOMMUNICATIONS GROUNDING BUSBAR
R/C = RACK AND /OR CABINET GROUNDING BUSBAR
ER = EQUIPMENT ROOM
BCT = BONDING CONDUCTOR FOR TELECOMMUNICATIONS
EF = ENTRANCE FACILITY
GROUNDING SYSTEM NOTES: (THIS DETAIL
11 TBBC, TEBC, AND BC GROUNDING CONDUCTORS MUST BE INSTALLED IN COMPLIANCE
WITH LOCAL CODES; THIS MAY REQUIRE INSTALLATION IN METALLIC CONDUIT IF RUN
THROUGH PLENUM CEILING CAVITIES.
21 GROUNDING CONDUCTORS RUN THROUGH A CONDUIT SHALL BE BONDED TO THE
CONDUIT AT EACH END.
31 ALL GROUND CONDUCTORS SHALL BE INSTALLED IN THE SHORTEST AND MOST DIRECT
PATH PRACTICAL.
41 WHERE THE ENTRANCE FACILITY IS LOCATED IN THE ER, THE TMGB SHALL ALSO SERVE
AS A TGB FOR THE ROOM; THE TBBCS REQUIRED FROM THE ER TO EACH TR ALONG THE
BACKBONE CABLE PATH WILL ALSO BE USED TO CONNECT THE TGBS TO THE TMGB.
51 REMOTE CABINETS SHALL SUBSTITUTE A R/C BUSBAR IN PLACE OF THE TGB.
TELECOMMUNICATIONS GROUNDING DIAGRAM
Scale = NONE
TELECOMMUNICATIONS SERVICE ENTRANCE
FACILITY
4'x8' PLYWOOD BACKBOARD MOUNTED BEHIND ENTRANCE
CONDUITS
LOCATED AS INDICATED ON THE FLOORPLAN
BC
BONDING CONDUCTOR TO ELECTRICAL
GROUNDING ELECTRODE SYSTEM IF NOT CO-
LOCATED WITH BUILDING ELECTRICAL
SERVICE ENTRANCE
TMGB 10 0 0
SPACE RESERVED FOR ;
CABLE TV SERVICE ENTRANCE - GROUND : • •
CONNECTION BY UTILITY ;
...........
SPACE RESERVED FOR
TELEPHONE SERVICE ENTRANCE
(PROTECTORS) - GROUND CONNECTION BY
UTILITY
9
- BCT TO BUILDING
SERVICE
INTERSYSTEM
BONDING
CONNECTION POINT
BC
(SHORT AS PRACTICAL)
FROM TBBC TO TGB
TBBC
(TYPICAL)
TBBC FROM TMGB CONTINIOUS TO FARTHEST ER/TR
AND BONDED TO LAST BUSBAR; INTERIM ER/TR
BUSBARS ATTACH TO TBBC WITH A SHORT BC
UTILIZE A SEPARATE TBBC IN EACH DIRECTION
REQUIRED BY BUILDING LAYOUT
TBBC(S) SHALL BE INSTALLED ALONG THE THE
SHORTEST AND MOST DIRECT PATH
TBBC
(TYPICAL)
TBBC FROM THE ER TO EACH TR - BONDED TO THE TGB
AT EACH END
TBBC MUST FOLLOW THE PATH OF THE BACKBONE
CABLES
BUILDING
ELECTRICAL SERVICE ENTRANCE
(LOCATED AS INDICATED ON THE
FLOORPLAN)
BY DIVISION 26
INTER - SYSTEM
BONDING
CONNECTION POINT
(PER NEC 250- 92(B)) _
BY DIVISION 16
MAIN COMMON BUILDING
GROUND
BY DIVISION 16
TGB
(TYPICAL)
WORK BY DIVISION 26
LECTRICAL CONTRACTOR
ELECTRICAL GROUNDING ELECTRODE SYSTEM
BY DIVISION 26
ATTACHMENT TO THE ELECTRICAL GROUNDING ELECTRODE SYSTEM
(BY DIVISION 26)
CONNECTION (WITH APPROVED BONDING METHOD) TO NEAREST
APPROVED BUILDING GROUND:
11 GROUNDED ELECTRICAL PANEL SERVING LOCAL AREA
2] GROUNDED CONDUIT SYSTEM ATTACHMENT
31 BUILDING STRUCTURAL STEEL
4] ANY COMBINATION OF THESE THAT IS ACCESSIBLE
(AS DIRECTED BY DIVISION 26 TO LIMIT POTENTIAL DIFFERENCES
BETWEEN TELECOMMUNICATIONS AND ELECTRICAL GROUNDING
SYSTEMS)
BC
TO ELECTRICAL GROUNDING
ELECTRODE SYSTEM
=BC(S) (TYPICAL -
ONE PER ROW)
WORK INSIDE BY DIVISION 26
WORK OUTSIDE BY DIVISION 27
TELECOMMUNICATIONS ROOMS, EQUIPMENT ROOMS,
AND REMOTE CABINETS
(TYPICAL)
(LOCATED AS INDICATED ON THE FLOORPLAN)
TEBC(S) (TYPICAL
AS REQUIRED)
RACK /CABINET BUSBAR
(MOUNTED ON REAR RAILS)
CONTINUE TO EACH
ADJACENT CABINET/
RACK
BOND TO ALL RACEWAYS, OR OTHER
METALLIC ITEMS IN THIS ROOM
INSTALLED BELOW CEILING LINE
WORK BY DIVISION 27
TELECOMM CONTRACTOR
4V4
CARMEL
PEDCOR DESIGN GROUP
E11�( —I
i uF;�l
Ss h'
D Y N
1�VJ �
i-A j!
Q;[.5 FaSt 56th,':V +t
SU T 2150
!I`D!A,`ir`S.Pn_L!S IN 462':6
17.`•i24. 63.'9 FAX
P E D C O R
?ip antex
DEVELOPMENT CO.
P; tct `.0 =i
1 Z O
GROUNDING
DIAGRAM
T6() I
d
y
_
44
x
P; tct `.0 =i
1 Z O
GROUNDING
DIAGRAM
T6() I