Meets BICSI and J-STDA requirements for network systems grounding applications. • Made of high conductivity copper and tin plated to inhibit corrosion . P r o d u c t s. T e c h n o l o g y. S e r v i c e s. D e l i v e r e d. G l o b a l l y. Standards Reference Guide. | F o r m o r e i n f o r m a t i o n., v i s i t w w w. a n. TIA J-STD Commercial Building Grounding (Earthing) and Bonding Requirements Superseded By: TIA W/D S/S BY TIAB PDF + Print Industry Association (TIA); Page Count: 54; ANSI Approved: Yes; DoD Adopted : No.
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The purpose of this presentation is to give the user a better understanding of the requirements set forth by. ANSI-J-STDA, Commercial. Building Grounding. ANSI-J-STDA JOINT Approved October 22, STANDARD. Commercial Building Grounding. (Earthing) and Bonding Requirements. View ANSI-J-STDACommercial Building tvnovellas.info from ELECTRICAL 12 at UET Peshawar. JOINT STANDARD.
Telecommunications Definition: All forms of information that are conveyed within the building, for example voice, data, video, environmental control, security, audio, etc. Also serves as the central attachment point for the telecommunications bonding backbone TBB and equipment. Typically 1 per building. Two-hole lugs are preferred. Connection Process Insert conductor so that it Butts up against end of barrel.
Design requirements and choices are provided to enable the designer to make informed design decisions. Stewardship Telecommunications infrastructure affects raw material consumption. The infrastructure design and installation methods also influence product life and sustainability of electronic equipment life cycling. These aspects of telecommunications infrastructure impact our environment.
Since building life cycles are typically planned for decades, technological electronic equipment upgrades are necessary. The telecommunications infrastructure design and installation process magnifies the need for sustainable infrastructures with respect to building life, electronic equipment life cycling and considerations of effects on environmental waste.
Telecommunications designers are encouraged to research local building practices for a sustainable environment and conservation of fossil fuels as part of the design process. Specification of criteria Two categories of criteria are specified; mandatory and advisory. The mandatory requirements are designated by the word "shall"; advisory requirements are designated by the words "should, "may", or "desirable" which are used interchangeably in this Standard.
Mandatory criteria generally apply to protection, performance, administration and compatibility; they specify minimally acceptable requirements. Advisory criteria are presented when their attainment may enhance the general performance of the cabling system in all its contemplated applications. A note in the text, table, or figure is used for emphasis or offering informative suggestions, or providing additional information.
Life of this Standard This Standard is a living document.
The criteria contained in this Standard are subject to revisions and updating as warranted by advances in building construction techniques and telecommunications technology. This Standard may also be used as a guide for the renovation or retrofit of existing systems.
At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
Distributor A: Optional connection facility in a hierarchical star topology that is cabled between the equipment outlet and Distributor B or Distributor C.
Distributor B: Optional intermediate connection facility in a hierarchical star topology that is cabled to Distributor C. Distributor C: Central connection facility in a hierarchical star topology. Local code requirements shall be followed.
The local code requirements should be reviewed with the local authority having jurisdiction AHJ. The review should confirm the currently adopted code and edition and any exceptions to the code that are adopted by the governing authority the AHJ.
If no code has been adopted locally, consult with the fire marshals office to determine what agency is responsible for code enforcement in that geographic area.
ATIS specifications support a robust level of service appropriate to a service provider. Users of this Standard are encouraged to refer to ATIS where robust service requirements exist. Bonding and grounding systems within a building are intended to have one electrical potential. While the bonding and grounding of the electrical service entrance is outside the scope of this Standard, coordination between electrical and telecommunications bonding and grounding systems is essential for the proper application of this Standard.
For example, electrical room and associated electrical panelboard s are not part of the telecommunications infrastructure, but they are depicted in this Standard because they are integral to the telecommunications bonding and grounding system. See subclauses 7.
When installed, the lightning protection system should meet the requirements of the authority having jurisdiction AHJ. See annex B for information regarding bonding and grounding of towers and antennas.
It includes the following major components: a telecommunications main grounding busbar TMGB ; b bonding conductor for telecommunications BCT ; and may also include the following: c telecommunications bonding backbone TBB ; d telecommunications grounding busbar TGB ; and, e grounding equalizer GE.
These telecommunications bonding and grounding components are intended to work with a buildings telecommunications pathways and spaces, installed cabling, and administration system. See subclauses 6. The intended function of a TBB is to reduce or equalize potential differences. A TBB is not intended to serve as the only conductor providing a ground fault current return path.
Where the word Listed is used as a requirement for a component, the component shall be Listed to the applicable standard s through a nationally recognized testing laboratory NRTL.
Figure 4 illustrates dimensions typical of a TMGB. Figure 5 illustrates dimensions typical of a TGB. When conductors are insulated, they shall be Listed for the application.
The size of the conductor is not intended to account for the reduction or control of electromagnetic interference EMI. The grounding conductors shall not decrease in size as the grounding path moves closer to earth. The TBB should be sized at 2 kcmil per linear foot of conductor length up to a maximum size of kcmil. This Standard allows the TBB conductor to be sized up to kcmil.
Bonding conductors used for telecommunications should be sized using engineered calculations. This includes bonding to ground the cable shields and metallic sheath members according to manufacturers installation instructions.
Where the building backbone telecommunications cabling incorporates a shield or metallic member, this shield or metallic member shall be bonded to the telecommunications main grounding busbar TMGB or the telecommunications grounding busbar TGB where the cables are terminated or where pairs are broken out from the cable sheath. When secondary protection is provided, the secondary protector grounding conductor shall be connected to the nearest TMGB or TGB using the shortest grounding conductor practical.
Grounding through the equipment alternating current ac power cord does not meet the intent of this Standard. It is intended that the information technology equipment ITE be provided a supplementary and specific ground path for the equipment over and above the required ac or direct current dc power ground path.
NOTE Many types of equipment do not require individual bonding conductors and as such do not have an attachment point for bonding conductors. Equipment that does not have attachment points for bonding conductors may be bonded either through the equipment rail or the power cord.
Refer to the manufacturers documentation for guidelines. Short metallic pathways e. Additionally, this Standard does not require bonding of the steel bars of a reinforced concrete building. The TEF may also include antenna cable entrances see annex B , and electronic equipment serving telecommunications functions. It is desirable that all utilities enter the building in close proximity to each other.
The TMGB and the TGB shall be located within the Distributor so as to provide the greatest flexibility and accessibility for telecommunications system grounding minimizing practical lengths and number of bends of bonding conductors to the TGB. This supplementary bonding network may be in a form as identified in subclause 7.
For computer rooms, the holistic mesh-BN is a recommended practice since it simplifies installation procedures, most ITE is powered by ac branch circuits, and most ITE employed for a computer room is suitable for placement directly into the common bonding network CBN.
However, under certain circumstances such as a manufacturers requirement or access provider recommendations, the ITE may also be arranged into certain segregated functional system blocks of either mesh-BN, mesh isolated bonding network mesh-IBN , or other form of bonding network BN , within the same room. The BN may also provide for electromagnetic shielding in varying degrees based upon its design and installation. The SBG typically covers the entire computer room or a local area within a room.
The historical spacing for the SBG pattern is between 0.
The minimum density of the bonding grid is 3 m 9. View this thru inspection port. However, for metallic pathways containing grounding conductors where the pathway is bonded to the grounding conductor, no additional bond to the TMGB is required. This location should have adequate access while providing minimal obstruction to rack mounted equipment. Remove any paint, oxidation and dust from the surface using a grinding tool.
Apply a generous coating of aluminum Antioxidant Joint Compound to the mounting surface. Attach bonding conductor using a two-hole compression lug and stainless steel hardware. Wipe off any excess antioxidant material. This conductor is intended to conduct lightning and ac fault currents from the telecommunication primary protectors. A minimum of mm 1 ft separation shall be maintained between this insulated conductor and any dc power cable, switchboard cable, or high frequency cables, even when placed in rigid metal conduit or EMT.
In buildings where the backbone cable incorporates a shield or metallic member, this shield or metallic member shall be bonded to the TMGB or TGB. Bonding Conductor for Telecommunications 5. While the TBB will carry some current under ac power ground fault conditions, it is not intended to provide the only ground fault return path. The minimum TBB conductor size shall be a No. The sizing of the TBB is not intended to account for the reduction or control of electromagnetic interference.
Where splices are necessary, the number of splices should be a minimum and they shall be accessible and located in telecommunications spaces. Joined segments of a TBB shall be connected using exothermic welding, irreversible compression-type connectors, or equivalent. The metallic cable shield shall not be used as a TBB.
Grounding Equalizer Conductor that connects elements of the telecommunications grounding infrastructure. Telecommunications Grounding Busbar TGB The TGB is the grounding connection point for telecommunications systems and equipment in the area served by that telecommunications room or equipment room.