Add_1_SECTION_16_11_00_RACEWAYS.pdf

MAHG10-1032

SECTION 16110 - RACEWAYS

PART 1 - GENERAL

1.01 DESCRIPTION

A. Raceways indicated on Drawings and specified herein shall be complete in all respects including all necessary and incidental fittings, hangers and appurtenances required for a complete installation.

B. Install all conductors in metallic raceways.

PART 2 - PRODUCTS

2.01 RIGID CONDUIT

A. Galvanized Rigid Conduit (GRC) in all sized may be used throughout project without regard to location or application. Any portion of a raceway using galvanized rigid conduit shall not be joined with IMC, EMT, or PVC. Refer to Article 346 NEC for further restrictions.

2.02 METALLIC CONDUIT

A. Intermediate metal conduit (IMC) or electric metallic tubing (EMT) in all sizes may be used throughout project without regard to location or application. Refer to Article 345 NEC for further restrictions.

2.03 FLEXIBLE METALLIC CONDUIT

A. shall not be used.

2.04 POLYVINYL CHLORIDE CONDUIT (PVC)

A. PVC may be used only in applications expressly noted on drawings or specified herein. Use PVC below grade for wiring to security lighting.

B. Minimum construction shall be schedule 40 with manufacturer's recommended fittings/solvent applied.

2.05 ELECTRICAL METALLIC TUBING (EMT)

A. Electrical Metallic Tubing (EMT) up to and including 1" size may be used in all indoor applications in dry locations and shall not be embedded in concrete, earth or run exposes in wet locations.

PART 3 - EXECUTION

3.01 LAYOUT

A. Plans are diagrammatic and judgement shall be exercised to install electrical work in a practical manner to function properly and to fit building construction and finish. Items not shown or specified which are required to produce a complete, operative and finished system shall be provided.

Section 16 11 00_1-3

B. Cooperate with others in laying out work so that this phase of the work will properly fit the building and other Contractor requirements. Exact location of various outlets shall be determined from dimensions on general construction drawings or as may be determined on the job. Do not scale drawings for exact location of any outlet. Locations and characteristics of equipment furnished under other sections of the contract shall be determined from other Contractor's shop drawings or layouts prior to locating outlets.

C. The right is reserved to change the location of any outlet improperly installed to fit equipment or finish. Also to change the exact location of any outlet before initial installation. Unless otherwise shown or directed, the outlet boxes shall be located with center lines at elevations above finish floor lines or below ceiling lines as indicated.

D. Raceways exposed to view will be run perpendicular or parallel to the planes of the building structure. Where concealed in or below grade construction, raceways will take the most direct route between exit points. Raceways may be exposed to view only in the Mechanical Room.

3.02 INSTALLATION

A. Where several conduits are run together, they shall be neatly paralleled with concentric and true radii. All bends shall be true and even without kinks or flats. Seal the exposed ends of conduits during construction to prevent the entry of foreign materials. Clean and dry all conduits before installing conductors.

B. All empty conduit shall have a nylon pull cord (not nylon jet line) installed. This pull cord shall be free from knots and splices from box to box. Provide labeled tags on the pull cord to identify the location of each end.

C. Provide expansion fittings for conduits passing through structural expansion joints.

D. All raceway systems shall be concealed unless otherwise shown.

E. Conduits shall terminate with bushings of solid insulating plastic material utilizing two lock nuts where lock nuts are permitted. Where lock nuts are not permitted, conduit shall terminate with threaded hub connections equal to "Scru-tite". If it is not possible to install two lock nuts, then OZ type B or equal insulated bushings shall be utilized with one lock nut.

F. EMT crimp type connectors shall be installed with two opposing operations of the crimping tool to assure electrical continuity.

G. Where conduits are stubbed up from the floor and are not mechanically bonded to the terminal enclosure, then OZ type BL or equal insulated grounded bushings shall be utilized and grounded as specified hereinafter. Threads on steel conduit shall be protected with corrosion resistant conductive compound similar and equal to that manufactured by the Crouse-Hinds Company. Where concrete encasement is required, it shall be a minimum of 3" thick and shall be colored red when the voltage of the circuit enclosed within the conduit is above 600 volts. Raceways that are stubbed out below grade from transition to direct burial cable will have the ends of the raceways closed with Johns-Manville "Duxseal" or equal after the conductors are installed to prevent entry of foreign matter into the raceway.

H. At all connections to equipment, unions or flanges shall be utilized to facilitate maintenance, repair, or replacement. Flexible connection shall be utilized as specified hereinafter.

Section 16 11 00_2-3

I. Where raceway systems join equipment of dissimilar metals, they shall be made with fittings specially approved for the application.

END OF SECTION

Section 16 11 00_3-3