Attachment VI - Data Specs.pdf

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11-21-2023

27 11 00 - 1

SECTION 27 11 00

TELECOMMUNICATIONS ROOM FITTINGS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies equipment cabinets, interface enclosures, relay racks, and associated hardware in service provider DEMARC, computer and telecommunications rooms.

B. Telephone system is defined as an Emergency Critical Care Communication

System by the National Fire Protection Association (NFPA). Adhere to

Seismic reference standards for systems connecting to or extending telephone system and cabling.

1.2 RELATED WORK

A. Wiring devices: Section 26 27 26, WIRING DEVICES.

B. General electrical requirements that are common to more than one section in Division 27: Section 27 05 11, REQUIREMENTS FOR

COMMUNICATIONS INSTALLATIONS.

C. Requirements for personnel safety and to provide a low impedance path for possible ground fault currents: Section 27 05 26, GROUNDING AND

BONDING FOR COMMUNICATIONS SYSTEMS.

D. Conduits for cables and wiring: Section 27 05 33, RACEWAYS AND BOXES

FOR COMMUNICATIONS SYSTEMS.

1.3 SUBMITTALS

A. Submit in accordance with Section 27 05 11, REQUIREMENTS FOR

COMMUNICATIONS INSTALLATION.

B. Separate submittal into sections for each subsystem containing the following:

1. Pictorial layouts of each Telecommunications Room and Cross

Connection Space (VCCS, and HCCS termination cabinets), each distribution cabinet layout, and TCO as each is expected to be installed and configured.

2. Equipment technical literature detailing electrical and technical characteristics of each item of equipment to be furnished.

C. Environmental Requirements: Identify environmental specifications for housing system as initial and expanded system configurations.

1. Floor loading for batteries and cabinets.

2. Minimum floor space and ceiling height.

3. Minimum door size for equipment passage.

PART 2 - PRODUCTS

27 11 00 - 2

2.1 EQUIPMENT AND MATERIALS

A. Provide components of cabinet system (cabinet, thermal, cable and power management accessories) from a single manufacturer.

B. Equipment Standards and Testing:

1. Equipment must be listed by a NRTL where a UL standard is in existence; active and passive equipment must conform with each UL standard in effect for equipment, on the submittal date.

2. Each item of electronic equipment must be labeled by a NRTL that warrants equipment has been tested in accordance with, and conforms to specified standards.

C. Equipment Cabinets (Enclosures):

1. Fully enclose and physically secure internally mounted and connected, active and passive equipment.

2. Types of Equipment Enclosures accepted for specific VA Spectrum Management, FMS and OI&T applications in CFM and Facility Projects:

CABINET FUNCTION

Communications FMS Special Communications Equipment

Server / Router OI&T Data/LAN/WAN Equipment

Seismic Either FMS or OI&T use, specify need

Environmental Either FMS or OI&T use, specify need

3. Each cabinet to be:

a. Provided in head end, MCR, TER, PCR, EMGR, each TR at a minimum.

b. Fabricated with minimum 1.59 mm (16 gauge) steel.

c. Provided with manufacturer's standard painted finish in a color accepted by COR with concurrence from FMS Service Chief.

d. Mounted on floor or wall.

e. Lockable; tubular locks keyed alike. Provide six keys to COR for each cabinet.

4. Provide equipment mounting shelves; attach to front and rear mounting rails and allowing equipment to be secured to respective mounting rails.

5. Each enclosure to include:

a. Floor or wall mounting.

b. Knock out holes for conduit connections or cable entrance.

c. Front and rear locking doors; wall mounted cabinets require only front locking door.

d. Power outlet strips.

27 11 00 - 3

6. Provide quiet ventilation fan with non-disposable locally cleanable air filter.

a. External:

1) Overall Height:

a) Communications/Server: Maximum 2,184 mm (86 inches).

b) Seismic: Maximum 1,905 mm (75 inches).

2) Overall Depth:

a) Communications/Server: Maximum 914 mm (36 inches).

b) Seismic: Maximum 762 mm (30 inches).

3) Overall Width - All: Maximum 864 mm (34 inches).

b. Front Panel Openings:

1) Width:

a) Communications: 482.6 mm (19 inches), per EIA.

b) Server:

762 mm (30 inches), per EIA/ECA 310.

c) Seismic: 483 mm (19 inches), per EIA/ECA 310.

2) Height:

a) Communications/Server: Maximum 2,000 mm (78-3/4 inches or

45 Rack Units [RU]), per EIA/ECA 310.

b) Seismic: Maximum 1,689 mm (66-1/2 inches or 38 RUs, per

EIA/ECA 310).

c. Heavy Duty Cycle: Maximum 544 kilograms (1,200 pounds) capacity.

d. Certification:

1) NRTL (i.e. UL): For communications and server cabinets.

2) Telcordia Technologies: #63-GR-CORE, (2012) for seismic cabinets.

3) Seismic: Provide cabinet OEM constructed to seismic design category.

7. Cabinet Internal Components:

a. AC Power:

1) Standard “Quad AC Box”:

a) Power capacity: 20 Ampere, single phase, 120 VAC continuous duty.

b) Wire gauge: #12 AWG, solid copper, connected to room’s internal AC Power Panel, or as directed by COR.

c) Number of AC power outlets: Minimum 4 receptacles.

d) Enclosure: Fully self-contained, metal 102 mm (4 inch) x

102 mm (4 inches) x 64 mm (2-1/2 inches) with cover

27 11 00 - 4

e) Connection: Minimum 25.4 mm (1 inch) conduit connected to room’s AC Power Panel, or as directed by COR

f) Number of boxes: One.

g) Compliance: NRTL (i.e. UL); NPFA - 70 (NEC).

b. AC Outlet Strips:

1) Power Capacity: 15 Ampere, single phase, 120 VAC continuous duty.

2) Wire Gauge: Minimum #12 AWG, solid copper.

3) Number of AC Power Outlets: Minimum 10 “U” grounded.

4) Enclosure: Fully self-contained; typically metal.

5) Connecting Wire: Minimum 2 m (6 feet) long, with three prong self-grounding AC plug connected to cabinet’s internal AC

“Quad” box.

6) Number of Strips: 2.

7) Certification: NRTL (i.e. UL).

c. AC Power Line Surge Protector and Filter Construction:

1) Input Voltage Range: 120 VAC + 15 percent at 50/60 Hz, single phase.

2) Power Service Capacity: 20 AMP, 120 VAC.

3) Voltage Output Regulation: +5.0 percent, instantaneous of input.

4) Circuit Breaker: 15 AMP; may be self-contained.

5) AC Outlets: Minimum four duplex grounded NEMA 5-20R.

6) Response Time: 5.0 nanosecond.

7) Suppression: Isolate and filter any noise, surge spikes

a) Surge: Minimum 20,000 AMP.

b) Noise:

1) Common: -40 dB.

2) Differential: -45 dB.

8) Clamping Voltage: Minimum 300 V.

9) Enclosure: One; self-contained.

10) Mounting: Internal to cabinet floor or on internal mounting rail shelf, allowing two plugs from two plug strips.

11) AC Power Cord: Required; minimum 1,628 mm (6 feet), three wire (green ground); minimum #14 AWG stranded.

12) Compliance: NRTL (i.e. UL60950-1).

d. Uninterruptible Power Supply (UPS): Provide each cabinet with an internal UPS which may be combined with surge protector and

27 11 00 - 5 filter if system’s 50 percent expansion requirement is met.

Provide at least one hour continuous full load, two hours if working with a critical, emergency, safety, police system uninterruptible system primary AC Power, with a 50 percent 1.0 hour respectively reserve capacity, in the event of facility primary or emergency AC power failure.

1) UPS to include:

a) On-Off Switch: This function is required to be a part of system’s electronic supervision requirements.

b) First/Fast Charge Unit: Must provide clean predicable charge voltage/current. Function is required to be a part of system’s electronic supervision requirements.

c) Over Voltage/Current Protect: Cannot short circuit AC power line at any time. This function is required to be a part of system’s electronic supervision requirements.

d) Trickle Charge Unit: Must be capable of maintaining a suitable internal battery charge without damaging batteries.

e) Mounting: Provide per OEM’s direction.

f) Proper Ventilation: Do not override cabinets’ ventilation system.

g) Power Change from AC Input: Accomplish change without interruption to communications link or subsystem being protected. Generate visual and aural alarms in electrical supervision system, local and remote, to annunciating panels via direct connection for trouble indication.

2) Specific requirements for current and surge protection to include:

a) Voltage Protection: Threshold, line to neutral, starts at maximum 200 Volts peak. Transient voltage cannot exceed 330

Volts peak. Furnish documentation on peak clamping Voltage as a function of transient waveform.

b) Peak Power Dissipation: Minimum 35 Joules per phase, as measured for l.0 millisecond at sub branch panels, l00

Joules per phase at branch panels and 300 Joules per phase at service entrance panels. Typically, power dissipation is

12,000 Watts (W) for l.0 mS (or l2 Joules). Provide

27 11 00 - 6 explanation of how ratings were measured or empirically derived.

c) Surge Protector (may be combined with On-Off switch of

UPS): Must not short circuit AC power line at any time.

1) Components must be minimum silicon semi-conductors.

2) Secondary stages, if used, may include other types of rugged devices.

3) Indicators: Provide visual device indicating surge suppression component is functioning.

4) Electrical Supervision: Required; must be audile and visual, local and remote to annunciating panels via direct connection for trouble indication.

d) Provide current and surge protection on ancillary equipment.

e) Equip each cabinet with the following:

1) Equipment Mounting Rails (Front & Rear): Fully adjustable internal equipment mounting rails allowing front or rear equipment mounting with pre-drilled

EIA/ECA 310-E Standard tapped holes. Support entire equipment by supplementary support in addition to face mounting screws on rails.

2) Cabinet Ground: Stainless steel adjustable, lug connected to cabinet’s main structure providing an internal cabinet ground for all installed equipment properly bolted to rail and with ground wire connected.

3) Grounding Terminals: A separate mounting hole on equipment mounting rail, with stainless steel connecting bolt bonded by minimum #10 AWG copper wire to cabinet’s internal grounding lug.

8. Ground Interconnection: Bond cabinet’s common grounding lug to room’s communications circulating ground busbar with a minimum #4

AWG stranded copper wire.

9. Blank Panels: Provide at every unused rack space.

a. Match cabinet color.

b. Provide panels of 3 mm (1/8 inch) thick aluminum with vertical dimensions in increments of one rack unit (RMU) or 45 mm (1-3/4 inch) with mounting holes spaced to correspond to EIA/ECA 310-E

Standard 483 mm (19 inch) rack dimensions.

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c. Fill large unused openings with single standard large panel instead of numerous types.

d. Leave one blank rack space (RMU), covered with a blank panel, between each item of equipment, for minimum internal air flow.

e. Leave 356 mm (14 inches)(8.0 RMU) open space, covered with blank cover panel, for additional expansion equipment.

f. Wire Management: System that connects each item of installed equipment to room wire management system.

g. Knock-out Holes: Provide for cable entrance/exits via conduits, cable duct/trays.

10. Trouble Annunciator Panel: Provide trouble annunciator panel in HE cabinet locations and as shown on drawings compatible with electrical and electronic supervising signals to continuously monitor operating condition for system HE equipment, remote equipment, and interconnecting trunks.

a. When system’s supervising system detects malfunctioning equipment or trunk line, system must generate an audible and visual signal;

provide spare panel.

b. Technical Characteristics:

1) Silence Button or Switch: Provide to silence audible signal.

Visual signal will continue until supervisory circuit indicating a fault is corrected.

2) Visual Enunciators: Visually show system equipment and trunk-line operating conditions via its supervisory circuit indicating fault condition.

3) Connect each alarm function to report to PCS Console SMS.

D. Environmental Cabinet:

1. Enclosure must fully contain installed equipment, including electronics, in same manner as standard cabinet. Provide climate control for installed equipment as if they were in a standalone air handling area, regardless of local area air handling capabilities.

2. Provide an OEM’s fully assembled unit enclosure.

3. If more than two enclosures are required in any system location, provide OEM-assembled enclosures, in a single unit, side-by-side.

4. Technical Characteristics:

a. Environmental Control: Automatic, heating and cooling as required.

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b. Temperature Conditions (rated at 1,300 W of install equipment heat generation):

1) Internal Range: Maintains 26.67 degree to 37.78 degree C (80 degree to 100 degree f) of internal heat conditions.

2) External Range: Maximum 37.78 degrees + -3.89 degrees C (100 degrees + 25 degrees F).

c. Forced Air Unit: Required with non-disposable air filter;

unobstructed and uninterruptible.

d. Air Conditioning: As required; fully internal mounted.

e. Heater: As required; fully internal mounted.

f. UPS: Required; fully internal mounted.

g. Front Door: Full length, see through, EMI resistant and lockable, keyed alike with 7-pin tubular lock.

h. Rear door: Full length, see through, EMI resistant, and lockable keyed alike with 7-pin tubular lock.

i. Conduit Wiring Entrance: Top or bottom; fully sealed.

j. Input Power: Minimum 2 each; maximum 120 VAC at 20A, independent circuit, conduit for fixed or armored cable for moveable installations.

k. Dimensions:

1) Height: Maximum 1980 mm (78 inches).

2) Width: Maximum 635 mm (25 inches).

3) Depth: Maximum 965 mm (38 inches).

4) Front Panel Opening: 480 mm (19 inches), w/ EIA/ECA 310 mounting hole spacing.

l. Trouble Annunciator Panel: Refer to specific requirements in equipment cabinet.

m. Audio Monitor Panel: Refer to specific requirements in equipment cabinet.

E. Wall Mounted Distribution or System Interface Cabinet:

1. Construct of minimum 1.59 mm (16 gauge) cold rolled steel, with top, side and bottom panels.

2. Provide double-hinged front door and main cabinet body allowing access to all internal equipment and wiring; mount to solid walls or internal studs.

3. Provide baked-on iron phosphate primer and baked enamel paint finish in a color to be selected by the using FMS Chief or COR.

27 11 00 - 9

4. Provide integral and adjustable EIA/ECA 310 standard predrilled rack mounting rails to allow front panel equipment mounting and access.

5. After equipment, doors and panels are installed, snap-in-place chrome trim strip covers all front panel screw fasteners.

6. Provide full-length vertical piano hinge to allow entire front portion of cabinet to “swing out” from wall for access to installed equipment, wires and cable; maintain minimum OSHA Safety clearances and NFPA operational functions.

7. Provide an OEM’s fully assembled unit enclosure.

8. Equip these cabinets same as equipment cabinets, except mount UPS on floor below cabinet with AC power connection in conduit to AC service panel.

9. Technical Characteristics:

a. Overall Height: Maximum 1,218 mm (48 inches).

b. Overall Depth: Maximum 558 mm (22 inches).

c. Overall Width: Maximum 610 mm (24 inches).

d. Front Panel Horizontal: Maximum width 483 mm (19 inches).

e. Capacity: Maximum 180 kilograms (400 pounds).

f. Lockable:

1) Tubular lock with 7-pin security.

2) Key cabinets alike.

F. Stand Alone Open Equipment Rack:

1. Construct of minimum 1.59 mm (16 gauge) cold rolled steel with manufacturer's standard paint finish, in a color to be selected by

COR with concurrence from facility’s FMS Service Chief.

2. Floor-mount as directed by COR with concurrence from facility’s FMS

Service Chief.

3. Equip rack same as equipment cabinet, except mount UPS with additional support for weight and AC power connection in conduit to

AC service panel.

4. Provide an OEM fully assembled unit.

5. Technical Characteristics:

a. Overall Height: Maximum 2,180 mm (85-7/8 inches).

b. Overall Width: Maximum 535 mm (21-1/16 inches).

c. Front Panel Opening: 483 mm (19 inches), EIA/ECA 310 horizontal width.

d. Hole Spacing: Per EIA/ECA 310.

e. Load Capacity: Maximum 680.4 kg (1,500 lbs).

27 11 00 - 10

f. Certifications:

1) EIA/ECA: 310-E.

2) NRTL (i.e. UL): OEM specific.

G. Wire Management Equipment:

1. Provide an orderly horizontal and vertical interface between outside and inside wires and cables, distribution and interface wires and cables, interconnection wires and cables and associated equipment, jumper cables, and provide an uniform connection media for system fire-retardant wires and cables and other subsystems.

2. Interface to each cable tray, duct, wireway, or conduit used in the

3. Interconnection or distribution wires and cables must enter system at top (or from a wireway in the floor) via overhead protection system and be uniformly routed down both sides at same time, of the frames side protection system, then laterally for termination on rear of each respective terminating assembly.

4. Custom configure to meet 30 percent fill system design and user needs.

a. Minimum Height:

b. Minimum Depth:

c. Minimum Width:

H. Vertical Cable Managers:

1. Use same make, style and size of vertical cable manager on rack/frame or in between racks/frames when more than one cable manager is used on a rack/frame or group of racks/frames.

2. Match color and cover style of racks/frames and cable managers.

I. Horizontal Cable Managers:

1. Use same make and style of cable manager on rack/frame or racks/frames, when more than one horizontal cable manager is used on a rack/frame or group of racks/frames.

2. Match color of racks/frames and cable managers.

J. Telecommunication Room (TR): In hostile TR locations where it has been determined (by COR or Facility Chief Engineer) that proper TR climate or external signal radiation cannot be maintained or controlled, provide a minimum of two individual and properly sized self-contained climate controlled equipment cabinet enclosures; one designated for voice, and one designated for data service.

27 11 00 - 11

K. Provide installation hardware when enclosures or racks are attached to structural floor.

L. Provide noise filters and surge protectors for each equipment interface cabinet, switch equipment cabinet, control console, and local and remote active equipment locations to ensure protection from input primary AC power surges so as a consequence noise glitches are not induced into low voltage data circuits.

PART 3 - EXECUTION

3.1 PREPARATION

A. Coordinate cabinet installation such that doors fully close and lock, with active and passive equipment installed and connected.

B. Verify equipment dimensions and brackets allow mounting with cabinet doors closed. Front door or rear door of any cabinet that does not close and lock may result in immediate cancellation of inspections or tests.

3.2 INSTALLATION

A. Equipment Cabinets:

1. Install cabinets in a manner that complies with OEM instructions, requirements of this specification, and in a manner which does not constitute a safety hazard.

2. Provide weatherproof equipment installed outdoors or install in NEMA

3S rated enclosures with hinged doors and locks with two keys.

3. Install equipment indoors in NEMA 4 rated metal cabinets with hinged doors and locks with two keys.

B. Grounding:

1. Bond equipment, including identified Government furnished equipment, to ground so total ground resistance measures maximum 0.1 Ohm.

a. Install lightning arrestors and grounding in accordance with

NFPA.

b. Install gas protection devices at nearest point of entrance in buildings where protection is required and on same circuits as

MDF in telephone switch room.

c. Do not use AC neutral, including in power panel or receptacle outlet, for system control, subcarrier or audio reference ground.

d. Use of conduit, signal duct or cable trays as system or electrical ground is not permitted.

2. Connect each equipment grounding terminal to a separate mounting hole on equipment mounting rail, to right as one looks at it from

27 11 00 - 12 rear, with a minimum #12 AWG stranded copper wire with protective green jacket.

3. Extend common ground bus of minimum #10 AWG solid copper wire throughout each equipment cabinet and bond to TGB. Provide a separate isolated ground connection from each equipment cabinet ground bus to system ground. Do not tie equipment ground buses together.

4. Bond equipment to cabinet bus with copper braid equivalent to #12

AWG. Self-grounding equipment enclosures, racks or cabinets, that provide OEM certified functional ground connections through physical contact with installed equipment, are acceptable alternatives.

5. Bond cable shields to cabinet ground bus with minimum #12 AWG stranded copper wire at only one end of cable run. Insulate cable shields from each other, faceplates, equipment racks, consoles, enclosures or cabinets, except at system common ground point. Bond coaxial and audio cables only at source; in all cases, keep cable shield ground connections to a minimum.

C. Equipment Assembly:

1. Cabinets:

a. Install and adjust cabinet/frame accessories to position, including thermal management accessories, vertical cable managers, vertical power managers and equipment-mounting rails, using manufacturer’s installation instructions prior to baying or placing cabinet for attachment to building and before installing any rack-mount equipment into cabinet. Shelves, horizontal cable managers and filler panels (rack-mount accessories), if used, may be installed after cabinet is placed.

b. When used in a multi-cabinet bay, attach cabinets side-by-side using baying kits according to manufacturer’s instructions.

c. Attach overhead ladder rack or cable tray to ceiling or top of cabinet. Maintain minimum 75 mm (3 inches) clearance between top of cabinet and bottom of ladder rack/cable tray. Position ladder rack/cable tray so that it does not interfere with hot air exhaust through cabinet’s top panel. Use radius drops where cable enters or exits ladder rack/cable tray.

d. Install ladder rack with side stringers facing rack or cabinet so that ladder forms an inverted U-shape and so that welds between

27 11 00 - 13 stringers (sides) and cross members (middle) face away from cables.

e. Secure ladder rack to tops of equipment racks or cabinets using manufacturer’s recommended supports and appropriate hardware.

f. Attach bonding conductor sized per TIA-607-B between telecommunications grounding busbar and cabinet. Attach bonding conductor to cabinet using a ground terminal block according to manufacturer’s installation instructions.

g. Provide bonding conductor and other hardware required to make connections between cabinet and telecommunications grounding busbar.

h. Install rack mounted equipment normally requiring adjustment or observation so operational adjustments can be conveniently made.

i. Mount heavy equipment with rack slides or rails to allow servicing from front of enclosure. Provide support in addition to front panel mounting screws for heavy equipment.

j. Provide with cable slack to permit servicing by removal of installed equipment from front of enclosure.

k. Install color-matched blank panel spacer 44 mm (1.75 inches) high between each piece of active and passive equipment to ensure adequate air circulation for efficient equipment cooling and air ventilation.

l. Provide quiet fans and non-disposable air filters at each console or cabinet.

m. Install enclosures and racks plumb and square, permanently attached to building structure and held in place.

n. Provide 381 mm (15 inches) of front vertical space opening for additional equipment.

o. Install equipment located indoors in metal racks or enclosures with hinged doors to allow access for maintenance without causing interference to other nearby equipment.

p. Cables must enter equipment racks or enclosures in such a manner to allow doors or access panels to open and close without disturbing or damaging cables.

q. Mount distribution hardware in a manner that allows access to connections for testing and provides room for doors or access panels to open and close without disturbing the cables.

2. Racks:

27 11 00 - 14

a. Assemble racks according to manufacturer’s instructions.

b. Verify that equipment mounting rails are sized properly for rack-mount equipment before attaching rack to floor.

c. Attach assembled racks to floor in four places using appropriate floor mounting anchors. When placed over a raised floor, threaded rods should pass through raised floor tile and be secured in structural floor below.

d. Bond racks to telecommunications grounding busbar using appropriate hardware provided by contractor.

e. Ladder rack may be attached to top of rack to deliver cables to rack. Do not drill rack to attach; use appropriate hardware from rack manufacturer.

f. Provide radius drops to guide cable where cable exits or enters side of overhead ladder rack to access a rack, frame, cabinet or wall-mounted rack, cabinet or termination field.

g. Evenly distribute equipment load on rack. Place large and heavy equipment towards bottom of rack. Secure equipment to rack with equipment mounting screws.

3. Vertical Cable Managers:

a. Provide vertical managers so number of cables in each manager does not exceed OEM fill capacity.

b. Attach vertical cable managers to side of rack/frame using manufacturer’s installation instructions and hardware.

c. Attach vertical cable manager to both racks/frames when a single vertical cable manager is used between two racks/frames.

d. Dress cables through openings in between T-shaped guides on manager so that cables make gradual bends as they exit or enter cable manager into rack-mount space (RMU). Do not twist, coil or make sharp bends in cables.

e. Attach doors to cable manager in closed position after cabling is complete.

4. Horizontal Cable Managers:

a. Attach horizontal cable managers to rack/frame with minimum four screws according to manufacturer’s installation instructions.

Center each cable manager within allocated rack-mount space

(RMU).

27 11 00 - 15

b. Provide horizontal managers located so number of cables each manager supports is less than cable manager’s cable fill capacity.

c. Dress cables through openings in between T-shaped guides on cable manager so that cables make gradual bends as they exit or enter cable manager into rack-mount space (RMU). Do not twist, coil or make sharp bends in cables.

d. Attach covers to cable manager in closed position after cabling is complete.

D. Labeling: Permanently label each enclosure in accordance with TIA-606-B using thermal ink transfer process; handwritten labels are not acceptable.

1. Equipment: Label system equipment with contrasting plastic laminate or bakelite material on face of unit corresponding to its source.

2. Conduit, Cable Duct, and/or Cable Tray: Label conduit, duct and tray, including utilized GFE, with permanent marking devices or spray painted stenciling a minimum of 3 m (10 feet), identifying

- - - E N D - - -

27 05 26 - 1

SECTION 27 05 26

GROUNDING AND BONDING FOR COMMUNICATIONS SYSTEMS

A. This section identifies common and general grounding and bonding requirements of communication installations and applies to all sections of Divisions 27.

A. Low voltage wiring: Section 27 10 00, STRUCTURED CABLING.

A. Submit in accordance with Section 27 05 11, REQUIREMENTS FOR

COMMUNICATIONS INSTALLATIONS.

B. Provide plan indicating location of system grounding electrode connections and routing of aboveground and underground grounding electrode conductors.

C. Closeout Submittals: In addition to Section 27 05 11, REQUIREMENTS FOR COMMUNICATIONS INSTALLATIONS provide the following:

1. Certified test reports of ground resistance.

2. Certifications: Two weeks prior to final inspection, submit following to COR:

a. Certification materials and installation is in accordance with construction documents.

b. Certification complete installation has been installed and tested.

2.1 COMPONENTS

A. Grounding and Bonding Conductors:

1. Provide UL 83 insulated stranded copper equipment grounding conductors, with the exception of solid copper conductors for sizes

6 mm² (10 AWG) and smaller. Identify all grounding conductors with continuous green insulation color, except identify wire sizes 25 mm²

(4 AWG) and larger per NEC.

2. Provide ASTM B8 bare stranded copper bonding conductors, with the exception of ASTM B1 solid bare copper for wire sizes 6 mm² (10 AWG) and smaller.

B. Ground Rods:

1. Copper clad steel, 19 mm (3/4-inch) diameter by 3000 mm (10 feet) long, conforming to UL 467.

27 05 26 - 2

2. Provide quantity of rods required to obtain specified ground resistance.

C. Splices and Termination Components: Provide components meeting or exceeding UL 467 and clearly marked with manufacturer’s name, catalog number, and permitted conductor sizes.

D. Telecommunication System Ground Busbars:

1. Telecommunications Main Grounding Busbar (TMGB):

a. 6.4 mm (1/4 inch) thick solid copper bar.

b. Minimum 100 mm (4 inches) high and length sized in accordance application requirements and future growth of minimum 510 mm (20 inches) long.

c. Minimum thirty predrilled attachment points (two rows of fifteen each) for attaching standard sized two-hole grounding lugs.

1) 27 lugs with 15.8 mm (5/8 inch) hole centers.

2) 3 lugs with 25.4 mm (1 inch) hole centers.

d. Wall-mount stand-off brackets, assembly screws and insulators for

100 mm (4 inches) standoff from wall.

e. Listed as grounding and bonding equipment.

2. Telecommunications Grounding Busbar (TGB):

a. 6.4 mm (1/4 inch) thick solid copper bar.

b. Minimum 50 mm (2 inches) high and length sized in accordance application requirements and future growth of minimum 300 mm long

(12 inches) long.

c. Minimum nine predrilled attachment points (one row) for attaching standard sized two-hole grounding lugs.

1) 6 lugs with 15.8 mm (5/8 inch) hole centers.

2) 3 lugs with 25.4 mm (1 inch) hole centers.

d. Wall-mount stand-off brackets, assembly screws and insulators for

100 mm (4 inches) standoff from wall.

e. Listed as grounding and bonding equipment.

E. Equipment Rack and Cabinet Ground Bars:

1. Solid copper ground bars designed for horizontal mounting to framework of open racks or enclosed equipment cabinets:

a. 4.7 mm (3/16 inch) thick by 19.1 mm (3/4 inch) high hard-drawn electrolytic tough pitch 110 alloy copper bar.

b. 482 mm (19 inches) or 584 mm (23 inches) EIA/ECA-310-E rack mounting width (as required) for mounting on racks or cabinets.

27 05 26 - 3

c. Eight 6-32 tapped ground mounting holes on 25.4 mm (1 inch) intervals.

d. Four 7.1 mm (0.281 inch) holes for attachment of two-hole grounding lugs.

e. Copper splice bar of same material to transition between adjoining racks.

f. Two each 12-24 x 19.1 mm (3/4 inch) copper-plated steel screws and flat washers for attachment to rack or cabinet.

g. Listed as grounding and bonding equipment.

2. Solid copper ground bars designed for vertical mounting to framework of open racks or enclosed equipment cabinets:

a. 1.3 mm (0.05 inch) thick by 17 mm (0.68 inch) wide tinned copper strip.

b. 1997 mm (78 inches) high for mounting vertically on full height racks.

c. Holes punched on 15.875 mm-15.875 mm-12.7 mm (5/8”-5/8”-1/2”) alternating vertical centers to match EIA/ECA-310-E Universal

Hole Pattern for a 45 RMU rack.

d. Three #12-24 zinc-plated thread forming hex washer head installation screws, an abrasive pad and antioxidant joint compound.

e. NRTL listed as grounding and bonding equipment.

F. Ground Terminal Blocks: Provide screw lug-type terminal blocks at equipment mounting location (e.g. backboards and hinged cover enclosures) where rack-type ground bars cannot be mounted.

1. Electroplated tin aluminum extrusion.

2. Accept conductors ranging from #14 AWG through 2/0.

3. Hold conductors in place by two stainless steel set screws.

4. Two 6 mm (1/4 inch) holes spaced on 15.8 mm (5/8 inch) centers to allow secure two-bolt attachment.

5. Listed as a wire connector.

G. Splice Case Ground Accessories: Provide splice case grounding and bonding accessories manufactured by splice case manufacturer when available. Otherwise, use 16 mm² (6 AWG) insulated ground wire with shield bonding connectors.

H. Irreversible Compression Lugs:

1. Electroplated tinned copper.

2. Two holes spaced on 15.8 mm (5/8 inch) or 25.4 mm (1 inch) centers.

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3. Sized to fit the specific size conductor.

4. Listed as wire connectors.

I. Antioxidant Joint Compound: Oxide inhibiting joint compound for copper-to-copper, aluminum-to-aluminum or aluminum-to-copper connections.

3.1 EQUIPMENT INSTALLATION AND REQUIREMENTS

A. Exterior Equipment Grounding: Bond exterior metallic components

(including masts and cabinets), antennas, satellite dishes, towers, raceways, primary telecommunications protector/arresters, secondary surge protection, waveguides, cable shields, down conductors and other conductive items to directly to Intersystem Bonding Termination.

B. Install telecommunications bonding backbone conductor throughout building via telecommunications backbone pathways effectively bonding all interior telecommunications grounding busbars in telecommunications rooms, telephone operators room, main computer room, digital telephone

(PBX) equipment room, VoIP active equipment room, and network operations room to telecommunications main grounding busbar in Demarc room after testing bond to verify bonding conductor for telecommunications from grounding electrode conductor is installed per

NEC. Size telecommunications bonding backbone conductor as specified in

TIA-607-B.

C. Inaccessible Grounding Connections: Utilize exothermic welding for bonding of buried or otherwise inaccessible connections with the exception of connections requiring periodic testing.

D. Conduit Systems:

1. Bond ferrous metallic conduit to ground.

2. Bond grounding conductors installed in ferrous metallic conduit at both ends of conduit using grounding bushing with #6 AWG conductor.

E. Boxes, Cabinets, and Enclosures:

1. Bond each pull box, splice box, equipment cabinet, and other enclosures through which conductors pass (except for special grounding systems for intensive care units and other critical units shown) to ground.

2. Raised Floors: Bonding raised floor components to ground.

F. Corrosion Inhibitors: Apply corrosion inhibitor for protecting connection between metals used to contact surfaces, when making ground and ground bonding connections.

G. Telecommunications Grounding System:

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1. Bond telecommunications grounding systems and equipment to facility’s electrical grounding electrode at Intersystem Bonding

Termination.

2. Provide hardware as required to effectively bond metallic cable shields communications pathways, cable runway, and equipment chassis to ground.

3. Install bonding conductors without splices using shortest length of conductor possible to maintain clearances required by NEC.

4. Provide paths to ground that are permanent and continuous with a resistance of 1 ohm or less from each raceway, cable tray, and equipment connection to telecommunications grounding busbar.

5. Below-Grade Connections: When making exothermic welds, wire brush or file the point of contact to a bare metal surface. Use exothermic welding cartridges and molds in accordance with manufacturer’s recommendations. After welds have been made and cooled, brush slag from weld area and thoroughly clean joint areas. Notify COR prior to backfilling at ground connections.

6. Above-Grade Bolted or Screwed Grounding Connections:

a. Remove paint to expose entire contact surface by grinding.

b. Clean all connector, plate and contact surfaces.

c. Apply corrosion inhibitor to surfaces before joining.

7. Bonding Jumpers:

a. Assemble bonding jumpers using insulated ground wire of size and type shown on drawings or use a minimum of 16 mm² (6 AWG) insulated copper wire terminated with compression connectors of proper size for conductors.

b. Use connector manufacturer’s compression tool.

8. Bonding Jumper Fasteners:

a. Conduit: Connect bonding jumpers using lugs on grounding bushings or clamp pads on push-type conduit fasteners. Where appropriate, use zinc-plated external tooth lockwashers or Belleville Washers.

b. Wireway and Cable Tray: Fasten bonding jumpers using zinc-plated bolts, external tooth lockwashers or Belleville washers and nuts.

Install protective cover, e.g., zinc-plated acorn nuts, on bolts extending into wireway or cable tray to prevent cable damage.

c. Grounding Busbars: Fasten bonding conductors using two-hole compression lugs. Use 300 series stainless steel bolts, Belleville Washers, and nuts.

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d. Slotted Channel Framing and Raised Floor Stringers: Fasten bonding jumpers using zinc-plated, self-drill screws and

Belleville washers or external tooth lock washers.

H. Telecommunications Room Bonding:

1. Telecommunications Grounding Busbars:

a. Install busbar hardware no less than 950 mm (18 inches) A.F.F.

b. Where other grounding busbars are located in same room, e.g.

electrical panelboard for telecommunications equipment, bond busbars together as indicated on grounding riser diagrams.

c. Make conductor connections with two-hole compression lugs sized to fit busbar and conductors.

d. Attach lugs with stainless steel hardware after preparing bond according to manufacturer recommendations and treating bonding surface on busbar with anti-oxidant to help prevent corrosion.

2. Telephone-Type Cable Rack Systems:

a. Aluminum pan installed on telephone-type cable rack serves as primary ground conductor within communications room.

b. Make ground connections by installing bonding jumpers:

1) Install minimum 16 mm² (6 AWG) bonding between telecommunications ground busbars and the aluminum pan installed on cable rack.

2) Install 16 mm² (6 AWG) bonding jumpers across aluminum pan junctions.

I. Self-Supporting and Cabinet-Mounted Equipment Rack Ground Bars:

1. Install rack-mount horizontal busbar or vertical busbar to provide multiple bonding points,

2. At each rack or cabinet containing active equipment or shielded cable terminations:

a. Bond busbar to ground as part of overall telecommunications bonding and grounding system.

b. Bond copper ground bars together using solid copper splice plates manufactured by same ground bar manufacturer, when ground bars are provided at rear of lineup of bolted together equipment racks.

c. Bond non-adjacent ground bars on equipment racks and cabinets with 16 mm² (6 AWG) insulated copper wire bonding jumpers attached at each end with compression-type connectors and mounting bolts.

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d. Provide 16 mm² (6 AWG) bonding jumpers between rack and cabinet ground busbars and overhead cable runway or raised floor stringers, as appropriate.

J. Backboards: Provide a screw lug-type terminal block or drilled and tapped copper strip near top of backboards used for communications cross-connect systems. Connect backboard ground terminals to cable runway using an insulated 16 mm² (6 AWG) bonding jumper.

K. Other Communication Room Ground Systems: Ground metallic conduit, wireways, and other metallic equipment located away from equipment racks or cabinets to cable tray or telecommunications ground busbar, whichever is closer, using insulated 16 mm² (6 AWG) ground wire bonding jumpers.

L. Communications Cable Grounding:

1. Bond all metallic cable sheaths in multi-pair communications cables together at each splicing or terminating location to provide 100 percent metallic sheath continuity throughout communications distribution system.

2. Install a cable shield bonding connector with a screw stud connection for ground wire, at terminal points. Bond cable shield connector to ground.

3. Bond all metallic cable shields together within splice closures using cable shield bonding connectors or splice case manufacturer’s splice case grounding and bonding accessories. When an external ground connection is provided as part of splice closure, connect to an effective ground source and bond all other metallic components and equipment at that location.

M. Communications Cable Tray Systems:

1. Bond metallic structures of cable tray to provide 100 percent electrical continuity throughout cable tray systems.

2. Where metallic cable tray systems are mechanically discontinuous:

a. Install splice plates provided by cable tray manufacturer between cable tray sections so resistance across a bolted connection is

0.010 ohms or less, as verified by measuring across splice plate connection.

b. Install 16 mm² (6 AWG) bonding jumpers across each cable tray splice or junction where splice plates cannot be used.

3. Bond cable tray installed in same room as telecommunications grounding busbar to busbar.

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N. Communications Raceway Grounding:

1. Conduit: Use insulated 16 mm² (6 AWG) bonding jumpers to bond metallic conduit at both ends and intermediate metallic enclosures to ground.

2. Cable Tray Systems: Use insulated 16 mm² (6 AWG) grounding jumpers to bond cable tray to column-mounted building ground plates (pads) at both ends and approximately 16 meters (50 feet) on centers.

O. Ground Resistance:

1. Install telecommunications grounding system so resistance to grounding electrode system measures 5 ohms or less.

2. Measure grounding electrode system resistance using an earth test meter, clamp-on ground tester, or computer-based ground meter as defined in IEEE 81. Record ground resistance measurements before electrical distribution system is energized.

3. Backfill only after below-grade connection have been visually inspected by COR. Notify COR twenty-four hours before below-grade connections are ready for inspection.

3.2 FIELD QUALITY CONTROL

A. Perform tests per BICSI’s Information Technology Systems Installation Methods Manual (ITSIMM), Recommended Testing Procedures and Criteria.

B. Perform two-point bond test using trained installers qualified to use test equipment.

C. Conduct continuity test to verify that metallic pathways in telecommunications spaces are bonded to TGB or TMGB.

D. Conduct electrical continuity test to verify that TMGB is effectively bonded to grounding electrode conductor.

E. Visually inspect to verify that screened and shielded cables are bonded to TGB or TMGB.

F. Perform a resistance test to ensure patch panel, rack and cabinet bonding connection resistance measures less than 5 Ohms to TGB or TMGB.

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SECTION 27 05 33

RACEWAYS AND BOXES FOR COMMUNICATIONS SYSTEMS

A. This section specifies conduit, fittings, and boxes to form complete, coordinated, raceway systems. Raceways are required for communications cabling unless shown or specified otherwise.

A. Sealing around penetrations to maintain integrity of fire rated construction: Section 07 84 00, FIRESTOPPING.

B. Requirements for personnel safety and to provide a low impedance path for possible ground fault currents: Section 27 05 26, GROUNDING AND

BONDING FOR COMMUNICATIONS SYSTEMS.

A. In accordance with Section 27 50 11, REQUIREMENTS FOR COMMUNICATIONS

INSTALLATIONS, submit the following:

1. Size and location of cabinets, splice boxes and pull boxes.

2. Layout of required conduit penetrations through structural elements.

3. Catalog cuts marked with specific item proposed and area of application identified.

B. Certification: Provide letter prior to final inspection, certifying material is in accordance with construction documents and properly installed.

2.1 MATERIAL

A. Minimum Conduit Size: 19 mm (3/4 inch).

B. Conduit:

1. Rigid Galvanized Steel: Conform to UL 6, ANSI C80.1.

2. Rigid Aluminum: Conform to UL 6A, ANSI C80.5.

3. Rigid Intermediate Steel Conduit (IMC): Conform to UL 1242, ANSI C80.6.

4. Electrical Metallic Tubing (EMT):

a. Maximum Size: 105 mm (4 inches).

b. Install only for cable rated 600 volts or less.

c. Conform to UL 797, ANSI C80.3.

5. Flexible Galvanized Steel Conduit: Conform to UL 1.

6. Liquid-tight Flexible Metal Conduit: Conform to UL 360.

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7. Direct Burial Plastic Conduit: Conform to UL 651 and UL 651A, heavy wall PVC, or high density polyethylene (HDPE).

8. Surface Metal Raceway: Conform to UL 5.

9. Wireway, Approved “Basket”: Provide "Telecommunications Service” rated with approved length way partitions and cable straps to prevent wires and cables from changing from one partitioned pathway to another.

C. Conduit Fittings:

1. Rigid Galvanized Steel and Rigid Intermediate Steel Conduit Fittings:

a. Provide fittings meeting requirements of UL 514B and ANSI/ NEMA

FB 1.

b. Sealing: Provide threaded cast iron type. Use continuous drain type sealing fittings to prevent passage of water and vapor. In concealed work, install sealing fittings in flush steel boxes with blank cover plates having same finishes as other electrical plates in room.

c. Standard Threaded Couplings, Locknuts, Bushings, and Elbows: Only steel or malleable iron materials are acceptable. Integral retractable type IMC couplings are also acceptable.

d. Locknuts: Bonding type with sharp edges for digging into metal wall of an enclosure.

e. Bushings: Metallic insulating type, consisting of an insulating insert molded or locked into metallic body of fitting. Bushings made entirely of metal or nonmetallic material are not permitted.

f. Erickson (union-type) and Set Screw Type Couplings:

1) Couplings listed for use in concrete are permitted for use to complete a conduit run where conduit is installed in concrete.

2) Use set screws of case hardened steel with hex head and cup point to seat in conduit wall for positive ground. Tightening of set screws with pliers is prohibited.

g. Provide OEM approved fittings.

2. Rigid Aluminum Conduit Fittings:

a. Standard Threaded Couplings, Locknuts, Bushings, and Elbows:

Malleable iron, steel or aluminum alloy materials; Zinc or cadmium plate iron or steel fittings. Aluminum fittings containing more than 0.4 percent copper are not permitted.

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b. Locknuts and Bushings: As specified for rigid steel and IMC conduit.

c. Set Screw Fittings: Not permitted for use with aluminum conduit.

3. Electrical Metallic Tubing Fittings:

a. Conform to UL 514B and ANSI/ NEMA FB1; only steel or malleable iron materials are acceptable.

b. Couplings and Connectors: Concrete tight and rain tight, with connectors having insulated throats.

1) Use gland and ring compression type couplings and connectors for conduit sizes 50 mm (2 inches) and smaller.

2) Use set screw type couplings with four set screws each for conduit sizes over 50 mm (2 inches).

3) Use set screws of case-hardened steel with hex head and cup point to seat in wall of conduit for positive grounding.

c. Indent type connectors or couplings are not permitted.

d. Die-cast or pressure-cast zinc-alloy fittings or fittings made of

"pot metal" are not permitted.

e. Provide OEM approved fittings.

4. Flexible Steel Conduit Fittings:

a. Conform to UL 514B; only steel or malleable iron materials are

b. Provide clamp type, with insulated throat.

c. Provide OEM approved fittings.

5. Liquid-tight Flexible Metal Conduit Fittings:

a. Conform to UL 514B and ANSI/ NEMA FB1; only steel or malleable iron materials are acceptable.

b. Fittings must incorporate a threaded grounding cone, a steel or plastic compression ring, and a gland for tightening.

c. Provide connectors with insulated throats to prevent damage to cable jacket.

d. Provide OEM approved fittings.

6. Direct Burial Plastic Conduit Fittings: Provide fittings meeting requirements of UL 514C and NEMA TC3, and as recommended by conduit manufacturer.

7. Surface Metal Raceway: Conform to UL 5 and “telecommunications service” rated with approved length-way partitions and cable straps to prevent wires and cables from changing from one partitioned pathway to another.

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8. Surface Metal Raceway Fittings: As recommended by raceway manufacturer.

9. Expansion and Deflection Couplings:

a. Conform to UL 467 and UL 514B.

b. Accommodate 19 mm (3/4 inch) deflection, expansion, or contraction in any direction, and allow 30 degree angular deflections.

c. Include internal flexible metal braid sized to ensure conduit ground continuity and fault currents in accordance with UL 467, and NEC code tables for ground conductors.

d. Jacket: Flexible, corrosion-resistant, watertight, moisture and heat resistant molded rubber material with stainless steel jacket clamps.

10. Rigid Aluminum Fittings:

a. Provide malleable iron, steel or aluminum alloy materials; zinc or cadmium plate iron or steel fittings. Aluminum fittings containing more than 0.4 percent copper are prohibited.

b. Locknuts and Bushings: As specified for rigid steel and IMC conduit.

c. Set Screw Fittings: Not permitted for use with aluminum conduit.

d. Indent type connectors or couplings are prohibited.

e. Die-cast or pressure-cast zinc-alloy fit-tings or fittings made of “pot metal” are not permitted.

f. Provide OEM approved fittings.

11. Wireway Fittings: As recommended by wireway OEM.

D. Conduit Supports:

1. Parts and Hardware: Provide zinc-coat or equivalent corrosion protection.

2. Individual Conduit Hangers: Designed for the purpose, having a pre-assembled closure bolt and nut, and provisions for receiving a hanger rod.

3. Multiple Conduit (Trapeze) Hangers: Minimum 38 mm by 38 mm (1-1/2 by 1-1/2 inch), 2.78 mm (12 gage) steel, cold formed, lipped channels;

with minimum 9 mm (3/8 inch) diameter steel hanger rods.

4. Solid Masonry and Concrete Anchors: Self-drilling expansion shields, or machine bolt expansion.

E. Outlet, Splice, and Pull Boxes:

1. Conform to UL-50 and UL-514A.

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2. Cast metal where required by NEC or shown, and equipped with rustproof boxes.

3. Sheet Metal Boxes: Galvanized steel, except where otherwise shown.

4. Install flush mounted wall or ceiling boxes with raised covers so that front face of raised cover is flush with wall.

5. Install surface mounted wall or ceiling boxes with surface style flat or raised covers.

F. Wireways: Equip with hinged covers, except where removable covers are shown.

G. Warning Tape: Standard, 4-Mil polyethylene 76 mm (3 inch) wide tape detectable type, red with black letters, and imprinted with “CAUTION

BURIED COMMUNICATIONS CABLE BELOW”.

H. Flexible Nonmetallic Communications Raceway (Innerduct) and Fittings:

1. General: Provide UL 910 listed plenum, riser, and general purpose corrugated pliable communications raceway for optical fiber cables and communications cable applications; select in accordance with provisions of NEC Articles 770 and 800.

2. Provide Communications Raceway with a factory installed 567 kg (1250 lb.) tensile pre-lubricated pull tape.

3. Use only metallic straps,…