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HomeMy WebLinkAbout260520 - METAL-CLAD CABLES TYPE MC-600v AND LESS.pdfMatt the Miller’s Carmel, IN L’Acquis Number 12056 Section 260520 Metal Clad Cables – Type MC – 600 Voltas and Less Page 1 of 4 March 23, 2012 Section 260520 Metal Clad Cables – Type MC – 600 volts and Less PART 1 � GENERAL 1.01 SUMMARY A. This section includes: 1. Metal clad cables � Type MC (600 volts and less). 1.02 RELATED DOCUMENTS A. Section 26 05 00 � Basic Electrical Requirements. 1.03 REFERENCES A. Review the Drawings and all sections of the Specifications for equipment furnished by other Contractors and the Owner throughout the entire project. B. See references noted in Specification Section 26 05 00, Paragraph 1.03. C. U.L. 1569 – Metal Clad Cables. D. U.L. 1479 � Test Procedure for Through Penetration Fire Rating. 1.04 SYSTEM DESCRIPTION A. Provide Type MC Cable were specifically allowed by the Contract Documents. 1.05 SUBMITTALS A. Submit shop Drawings and Product Data under provisions of Division 01 and Section 26 05 00. 1.06 QUALITY ASSURANCE A. Cable provided shall be NRTL certified and shall meet referenced requirements 1.07 DELIVERY, STORAGE AND HANDLING A. Deliver, Store and handle materials in accordance with Section 26 05 00. 1.08 PROJECT CONDITIONS A. Install all wire and cable in conduit, unless specifically indicated otherwise B. Conductor insulation to be selected in accordance with tables under Paragraph 2.3 based upon application. Matt the Miller’s Carmel, IN L’Acquis Number 12056 Section 260520 Metal Clad Cables – Type MC – 600 Voltas and Less Page 2 of 4 March 23, 2012 1.09 SEQUENCING AND SCHEDULING A. Sequence and Schedule work in accordance with Division 01 and Section 26 05 00. 1.10 WARRANTY A. Warranty in Accordance with requirements of Division 01 and Section 26 05 00. PART 2 � PRODUCTS 2.01 METAL CLAD CABLE � TYPE MC (600 VOLTS AND LESS) ACCEPTABLE MANUFACTURERS A. AFC Cable Systems. B. Allied Tube & Conduit. C. Aetna Insulated Wire Company. D. Southwire Company. 2.02 MATERIAL SELECTION A. Uses Permitted Under Base BidUnder an Alternate Bid: Type MC cable may be used in lieu of conduit and wire for branch circuiting under the following conditions:: 1. Installed concealed above finished ceilings in ceiling spaces. 2. Installed indoors above the ground floor slab and concealed within walls. 3. Unfinished Areas: Installed indoors exposed higher than 8’�0 above finished floor. 4. To serve new receptacles and switches in existing walls. This method may only be utilized vertically between a junction box located in the ceiling space within 1 foot of the wall and the new device outlet box. Properly support all Type MC cable or flexible conduit outside of the wall. B. Uses Not Permitted: 1. Uses prohibited by the National Electrical Code. 2. Below grade and exterior locations. 3. Switchboard and panelboard feeders. 4. Finished Areas: Exposed below finished ceilings. 5. Unfinished Areas: Installed indoors exposed below 8’�0 above finished floor. Matt the Miller’s Carmel, IN L’Acquis Number 12056 Section 260520 Metal Clad Cables – Type MC – 600 Voltas and Less Page 3 of 4 March 23, 2012 6. Within boiler rooms and mechanical rooms. 7. Circuits with overcurrent protection ratings greater than <60 amperes. 2.03 MATERIALS A. Metal clad cable shall be constructed in strict accordance with National Electrical Code Article 330 and Underwriters Laboratories, Inc., Standard for Metal Clad Cables. B. The cable shall bear the U.L. label. C. Cable shall have passed U.L. test procedure 1479, Through Penetration Fire Rating. D. Cable shall be listed for use in for environmental air handling spaces. E. Cable Construction: 1. Factory assembly of one or more insulated circuit conductors enclosed in an armor of interlocking metal tape, or smooth or corrugated metallic sheath. 2. Armor shall be steel. Aluminum armor is not acceptable. 3. Cable Conductors: a. Conductors used for cables shall be 98 percent conductivity copper, manufactured within the last two years, 600 volt insulation. b. Conductor smaller than 12 AWG not permitted except 14 AWG may be used for control with current less than 10 amps and wire length less than 50 feet. c. 8 AWG or larger conductors stranded. d. Conductor insulation shall be Type THHN and rated 90 degrees C. (dry locations) or greater. e. Insulated green equipment grounding conductor. f. Additional grounding conductors as required to satisfy requirements for a low�impedance fault�return path to clear the overcurrent protection device due to a ground fault. g. Provide oversized neutrals as indicated in the Contract Documents. Separate neutrals per phase may be provided in lieu of oversized neutrals. 2.04 ACCESSORIES A. Provide bushings inserted into end of cable at each connection to protect conductors from abrasion on edge of armor Matt the Miller’s Carmel, IN L’Acquis Number 12056 Section 260520 Metal Clad Cables – Type MC – 600 Voltas and Less Page 4 of 4 March 23, 2012 PART 3 � EXECUTION 3.01 INSTALLATION A. Installation of MC cable shall be in accordance with Article 330 of the National Electrical Code. B. Provide sheave wheels or pulleys at adequate distances along the routes of the cable pulls to pull the cables without damage. Short distance pulls over smooth surfaces may not require wheels or pulleys. Cable armor shall not separate enough to expose the cable interior. C. Pulling force shall be applied to the conductors and not the armor. D. Cable Support: 1. All supports shall be listed for use with Type MC cable. 2. In accordance with Section 330.30(A) of the National Electrical Code, cable shall be supported and secured at intervals not exceeding 6�ft. 3. In accordance with Section 330.30(D) of the National Electrical Code, cable shall not be required to be supported and secured where the cable is fished, between access points, where concealed in finished buildings or structures and supporting is impracticable. E. Bends: In accordance with Section 330.24 of the National Electrical Code, cable bends shall not exceed seven times the external diameter of the metallic sheath. F. Cable Connectors: Provide connectors listed for use with Type MC cable. G. Maximum Conductor Count Per Cable: For branch circuit wiring, do not group more than nine conductors in one cable. Conductors include all phase conductors and the neutral conductors, switch legs and travelers. Adjust conductor sizes to be in accordance with the derating requirements of Section 310 of the National Electrical Code. 3.02 CONSTRUCTION A. Splices: Splice only in accessible junction or outlet boxes. Connect conductors 8 AWG and smaller with compression connectors or wire nuts. Connect conductors 6 AWG and larger with compression or hy�dent type connectors. END OF SECTION 260520