260520 - FIRE RATED CABLES.pdf

TABLE OF CONTENTS

SECTION 260520 – FIRE RATED CABLES

PART 1 - GENERAL

1.1 REFERENCES

1.2 SCOPE

1.3 SUBMITTALS

1.4 QUALIFICATIONS

1.5 COORDINATION

1.6 STANDARDS

1.7 UNDERWRITERS LABORATORIES LABELS

PART 2 - PRODUCTS

2.1 BASIS OF DESIGN

2.2 MINERAL INSULATED CABLE (MI Cable)

2.3 MI CABLE WIRING CONNECTORS AND TERMINATIONS

2.4 METAL CLAD CABLE (MC Cable)

2.5 MC CABLE WIRING CONNECTORS AND TERMINATIONS

2.6 CABLE LADDER FOR MI FIRE RATED CABLE INSTALLATION

2.7 HANGERS AND SUPPORTS

PART 3 - EXECUTION

3.1 INSTALLATION OF MI CABLES

3.2 INSTALLATION OF MC CABLES

3.3 FIELD QUALITY CONTROL

BETHANY MIDDLE SCHOOL JUNE 6, 2025

FIRE PUMP REPLACEMENT VAN ZELM #2024090.00

FIRE RATED CABLES 260520 - 1

SECTION 260520 – FIRE RATED CABLES

PART 1 - GENERAL

1.1 REFERENCES

A. Refer to the GENERAL CONDITIONS, SUPPLEMENTARY CONDITIONS and applicable parts of DIVISION 1 for other general requirements. These requirements may be repeated in this Division for emphasis or for inclusion of more stringent/additional related requirements.

Such repetition shall NOT be construed to reduce the requirements of those Divisions NOR to eliminate other requirements under those Divisions.

B. THIS PROJECT WILL BE COMMISSIONED. REFER TO COMMISSIONING

SPECIFICATION SECTIONS FOR COMMISSIONING INFORMATION AND

RESPONSIBILITIES. THE COMMISSIONING PROCESS WILL REQUIRE ADDITIONAL

LABOR, MATERIAL AND/OR OTHER COSTS WHICH MUST BE PROVIDED BY THE

CONTRACTOR AS PART OF THIS PROJECT.

1.2 SCOPE

A. 2 Hour Rated, Mineral Insulated Cable Systems, including:

1. Type MI Seamless, Metal-Shielded Cable

2. Type MC Metalclad, rated cable assembly (NOT TO BE USED IN HEALTHCARE

PROJECTS)

3. Supports

4. Terminations

5. Testing & Certification

B. Type MI Cable shall not off gas or propagate smoke.

C. Type MC Cable shall be low-smoke, halogen free.

1.3 SUBMITTALS

A. Product information including:

1. Performance, material properties, physical characteristics, bending radius.

2. Electrical characteristics: Capacity at project application voltage, ambient temperature adjustment factors, voltage drop.

3. Certified Fire Protective Rating: Rating class (# hrs), UL Listing, FM approval.

4. Support materials and requirements, including installation details.

5. Termination materials and requirements, including installation details.

6. Smoke / Flame rating of cable materials

B. Manufacturer’s Installation Instructions: Indicate application conditions and limitations of use stipulated by product testing agency specified under Regulatory Requirements.

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C. Field reports on cable testing and acceptance.

1.4 QUALIFICATIONS

A. Manufacturer: Company specializing in manufacturing the products specified in this Section, with minimum of ten years documented experience.

B. Product manufactured in North America.

1.5 COORDINATION

A. Verify and field measure cable lengths based on actual path used for installation. Accurate cable length is critical for establishing proper cable size selection.

B. Where cable routing is shown on Contract Drawings, this is an approximation. Route cable as required to meet project conditions.

C. Unless otherwise noted, MI cable assemblies are to be 2 hour rated in accordance with Underwriters Laboratories certifications directories for fire resistive cables and/or electrical circuit integrity systems.

D. Review and establish points of cable termination and transitions to other conductor types.

1.6 STANDARDS

A. All work of this Section shall conform to following standards:

1. NEMA

2. National Electrical Code (NFPA 70)

3. UL 2196, UL certifications directories FHJR and FHIT.

4. FM specification tested

5. Codes and standards in effect in the Jurisdiction of Project

1.7 UNDERWRITERS LABORATORIES LABELS

A. Equipment, materials and components, for which there are listings in UL Product Directories, shall bear UL labels.

PART 2 - PRODUCTS

2.1 BASIS OF DESIGN

A. Basis of design for this project shall be using MI type cable for 2-hour rated feeder applications.

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B. MC type cable may be considered as an alternate under certain conditions as determined by the Engineer. Without exception, MC cable shall not be used in healthcare occupancies or other critical operations facilities.

2.2 MINERAL INSULATED CABLE (MI Cable)

A. Product Description:

1. ANSI/NFPA 70, Type MI

2. UL certification FHIT.1850

3. Conductor: Copper, solid.

4. Insulation Voltage Rating: 600 volts.

5. Cable Temperature Rating: 90 degrees C.

6. Termination Temp. Rating: 90 degrees C.

7. Insulation Material: Magnesium oxide refractory mineral.

8. Metal-sheath Material: liquid and gas tight, Continuous/Seamless soft drawn copper.

9. Fire Rating: Cable assembly including supports shall have a 2-hour fire rating as listed and classified by Underwriters Laboratories, Inc.

10. Over jacket may be provided where suitable for installation conditions

B. Provide and install multi-conductor cable bundle consisting of quantity of single conductors as indicated and solid uninsulated continuous ground run in center of bundle.

C. The cable shall be a solid copper conductor sized as indicated on drawings.

D. MI cable shall be provided and installed as a complete system including terminations per manufacturer’s recommendations and installation requirements.

2.3 MI CABLE WIRING CONNECTORS AND TERMINATIONS

A. Cable Termination:

1. Tyco Thermal Controls/Pyrotenax Model Quick-Term Installation Sheet 638.

2. Solid MI conductor to manufacturer’s approved solid rated lug may be used as an option to the Quick-Term Termination.

B. Cable Splice:

1. As indicated by product manufacturer.

2.4 METAL CLAD CABLE (MC Cable)

A. Product Description:

1. ANSI/NFPA 70, Type MC

2. UL certification FHIT.120

3. Conductor: Copper, stranded.

4. Insulation Voltage Rating: 600 volts.

5. Cable Temperature Rating: 90 degrees C.

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6. Termination Temp. Rating: 90 degrees C.

7. Insulation Material.

8. Metal-sheath Material: liquid and gas tight, continuously welded and corrugated copper.

9. Fire Rating: Cable assembly including supports shall have a 2-hour fire rating as listed and classified by Underwriters Laboratories, Inc.

B. Provide and install multi-conductor cable assembly consisting of quantity of single conductors encased in “Fire Roc” layer as indicated encased in overall corrugated copper armor. Copper sheath shall act as grounding conductor per NEC Section 250.

C. The individual conductors in cable assembly shall be Class B, stranded sized as indicated on drawings.

D. MC cable shall be provided and installed as a complete system including terminations per manufacturer’s recommendations and installation requirements.

2.5 MC CABLE WIRING CONNECTORS AND TERMINATIONS

A. Cable Termination:

1. Brass or stainless steel MC connectors

2. Stranded MC cable assembly conductor to approved rated lug may be used as an option.

B. Cable Splice:

1. As indicated by product manufacturer.

2.6 CABLE LADDER FOR MI FIRE RATED CABLE INSTALLATION

A. Provide where indicated or appropriate:

1. Cable tray support system shall be minimum 12” wide steel type, with rungs on 6” centers, minimum load depth of 3" and supports at 10 feet maximum intervals; meeting NEMA Standard VE-1-1991. Tray shall be by Cope, Mono Systems, Chalfant or B-Line.

2. Provide necessary hangers, fittings and supports to complete system.

3. Cable tray shall be ladder type.

2.7 HANGERS AND SUPPORTS

A. Cable assemblies shall be supported by clips or straps of structural material with minimum melting temperature of 1850°F. The support spacing shall not exceed UL listing and manufacturer’s listed spacings.

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PART 3 - EXECUTION

3.1 INSTALLATION OF MI CABLES

A. Parallel groups of cables shall be supported from below, either by horizontal angle irons or channel systems such as “Unistrut”, with vertical hanger rods at maximum of three-foot intervals.

B. Supports for cables on concrete walls shall be attached to wall with all metal expansion shields or methods as approved by Project’s Structural Engineer.

C. Installation of M.I. cable shall follow the manufacturer’s recommendations and as indicated.

D. Examination:

1. Verify that cable and factory temporary seals have remained intact, that the insulation has not been exposed to air, and that no moisture has entered cable insulation.

2. Verify that work of other trades likely to damage cable has been completed.

E. Storage:

1. Cable shall be shipped from the manufacturer with ends temporarily sealed against moisture ingress.

2. When cables are cut in the field, the end shall be sealed using standard sealing compound and PVC tape.

3. Cable shall be stored in a clean dry location.

F. Handling:

1. Cable shall be uncoiled by rolling and rotating supply reel. Do not pull from coil periphery or center.

2. Take precautions necessary to prevent damage to cable from contact with sharp objects, including pulling over foreign material or sheaves.

G. Bending:

1. Not less than five (5) times the cable diameter for cable not more than 3/4 inch.

2. Not less than ten (10) times the cable diameter for cable more than 3/4 inch.

H. Pulling:

1. For all cables up to and including #1 AWG use ten inch or larger sheaves.

2. For #1/0 through 250 kcmil inclusive, use 18 inch or larger sheaves.

3. For 350 kcmil and larger cables, use 24 inch or larger sheaves.

4. On pulls of over 360 degrees, contact manufacturer for assistance.

5. 350 and 500 kcmil cables shall not be pulled more than 360 degrees in total.

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I. Splicing:

1. All fire rated splices shall be made in the factory.

2. In the event a field splice is necessary, it must be approved by the Engineer and:

a. Made in the field by manufacturer’s field technician, or

b. Made in the field by personnel trained by the cable manufacturer using manufacturer’s components.

J. Terminations:

1. Field made terminations shall be made with cable manufacturer’s termination kits only.

Stripping tools, crimping and compression tools available from the manufacturer shall be used for proper cable termination.

2. Terminations must be completed immediately once started to avoid moisture ingress from surrounding air. Prior to completing each termination, test insulation resistance and follow manufacturer’s drying procedures until insulation resistance reaches an acceptance level.

3. Connections to ferrous cabinets for single conductor cables shall incorporate brass plates 1/4 inch thick by 4 inch wide by length as required with 1/2 inch, 3/4 inch, 1 inch per 1- 1/4" inch drilled and tapped holes. Install per manufacturers’ drawing.

4. For applications using 90 degree C rating of cable, lugs shall be rated 90 degrees C.

K. Sheath induction reduction:

1. When multi-phase circuits have paralleled single conductors, cables shall be run in groups having one of each phase and neutral in each group.

2. Each set of paralleled conductors shall be separated by at least two single cable diameters.

3. Each group of cables shall be fastened tightly together, at least once between each support on horizontal runs and twice on vertical runs, using 1/2 inch wide by 0.030 inch thick stainless steel straps.

L. Exposed or Surface installations:

1. Cable may be secured directly to fire rated building structure using an approved method such as one, or any combination, of the following:

a. Straps: 1/2 inch wide x 3-1/2 inch long by 0.030 inch thick stainless steel or copper straps. Each strap shall contain two 1/4 inch holes for securing with 3/16 inch by minimum 1-3/4 inch long steel anchors.

b. Steel struts and cable tray: Use only the steel strut framing system and support recommended by Pyrotenax. Aluminum or other materials are not acceptable.

c. Other approved method.

d. Cable supports shall not exceed six (6) feet on center horizontally or vertically.

e. Cables shall be installed parallel to building lines.

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M. Wall or floor penetrations:

1. Provide sleeve to protect cable and penetration opening during pulling.

2. Provide approved sealing of all penetrations.

N. Neatly train and lace cable inside boxes, equipment, and switchboard.

O. Embedded Installations:

1. Cables will be run in the same trifoil configuration as exposed installations.

2. Protect against damage during pulling, and during concrete pouring or backfill and tamping.

3. Where cables emerge from grade, provide PVC conduit, metal plate or angle iron. This protection shall minimally extend from 18 inches below grade to 8 ft. above grade.

3.2 INSTALLATION OF MC CABLES

A. Parallel groups of cables shall be supported from below, either by horizontal angle irons or channel systems such as “Unistrut”, with vertical hanger rods at maximum of three-foot intervals.

B. Supports for cables on concrete walls shall be attached to wall with all metal expansion shields or methods as approved by Project’s Structural Engineer.

C. Installation of MC. cable shall

1. Be installed in accordance with applicable sections of the NEC.

2. Be installed in accordance with UL certification FHIT.120, Electrical Circuit Integrity

Systems.

3. Be installed in accordance with Manufacturer’s installation instructions.

D. Examination:

1. Verify that cable has remained intact, and that no moisture has entered cable insulation.

2. Verify that work of other trades likely to damage cable has been completed.

E. Exposed or Surface installations:

1. Cable may be secured directly to fire rated building structure using an approved method such as one, or any combination, of the following:

a. Steel struts and cable tray: Use only the steel strut framing system and support recommended by Manufacturer. Aluminum or other materials are not acceptable.

b. Other approved method.

c. Cable supports shall not exceed three (3) feet on center horizontally, or six (6) feet vertically.

d. Cables shall be installed parallel to building lines.

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F. Wall or floor penetrations:

1. Provide sleeve to protect cable and penetration opening during pulling.

2. Provide approved sealing of all penetrations.

G. Neatly train and lace cable inside boxes, equipment, and switchboard.

3.3 FIELD QUALITY CONTROL

A. Inspect cable for physical damage and proper connection.

B. Measure tightness of bolted connections and compare torque measurements with manufacturer’s recommended values.

C. Verify continuity of each conductor.

D. Prior to energizing cables, measure insulation resistance of each cable. Tabulate and submit for approval.

E. Provide certification from cable manufacturer that installation is in accordance with their requirements.

END OF SECTION

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