General Construction Specifications
PART 1 - GENERAL
01 WORK INCLUDED
A. Work specified under this section is to include control wiring less than 120 volts, motors and motor controllers not furnished as an integral part of or in motor control centers, drip pans, contactors, and switches.
02 RELATED WORK
A. Refer to Division 16, ELECTRICAL SPECIFICATIONS, for requirements of that Division.
B. Electrical installations shall comply with the applicable edition of the National Electrical Code.
C. Starters, switches, etc. shall be installed in appropriate NEMA approved enclosures.
03 SUBMITTALS
A. Submit manufacturer's product data to Architect for approval in accordance with Section 15010.
PART 2 - PRODUCTS
04 MANUFACTURERS
A. Provide motors as manufactured by U.S. Motors, Century/Gould, General Electric, or Marathon.
B. Provide motor starters, switches, and contactors by Allen-Bradley, Westinghouse, General Electric, ITE/Siemens or Square D.
05 MOTORS
A. Electric motors shall be new NEMA Standard, sized and designed to operate at full load and full speed continuously without causing noise, vibration, and temperature rise in excess of their rating.
Motors on belt driven shall have slide rails with adjusting screws for belt tension adjustment.
B. Temperature Rating shall be based on Class A insulation, except where otherwise indicated or required for the intended service.
C. Starting capability shall be as required for the service indicated, but not less than five starts per hour.
D. Phase and Current: For motor sizes up to 1/6 HP shall be the Contractor's option; sizes up through 1/2 HP shall be single-phase capacitor-start; sizes larger than 1/2 HP shall be squirrel-cage, induction, polyphase. Provide two separate windings on two-speed polyphase motors. Refer to Division 16 sections for actual current characteristics.
E. Service factor shall be 1.15 for polyphase motors and 1.35 for single-phase motors. Service factor shall include belt and/or drive losses.
F. Construction shall be General Purpose, continuous duty, Design "B".
G. Frames shall be in accordance with the latest NEMA Standards.
H. Bearings shall be ball or roller type, designed for thrust where applicable. Bearing shall be regreasable except provide permanently sealed bearings where not accessible for greasing. Sleeve-type bearings are acceptable only for light-duty fractional HP motors.
I. Enclosure types shall be open drip-proof for normal concealed indoor use, guarded where exposed to employees or occupants. Weather-protected Type II enclosures for outdoor use, except weather-protected type I where adequately housed.
J. All motors shall be "Quiet" rated except where otherwise indicated.
06 STARTERS AND SWITCHES
A. All starters and switches shall be provided in NEMA Type I general purpose enclosure with padlock ears and supports for mounting where indicated.
B. Manual switches shall be provided on all motors 1/2 HP and smaller, except where automatic control or interlock is indicated. Provide overload protection where not protected by panelboard circuit-breaker or fused disconnect switch. Provide indicating pilot light, with green lens, for each switch.
C. Magnetic starters shall be provided for all larger than 1/2 HP motors, and for smaller motors on automatic control or with interlock switch. Include manual-reset trip-free overload protection relay on each phase, under-voltage release, auxiliary interlocks, and other control devices as shown on interlock wiring diagrams. Starters shall be combination type with fused and/or unfused disconnect switches unless otherwise noted on the drawings or in the schedules.
D. Starters shall have 120 volt control transformers individually fused from the line side of the starter using two cartridge fuses. Transformer fuses shall be sized to carry the holding coil circuit and other connected devices.
E. All starters shall be furnished with pilot light and with pushbutton station or selector switch as indicated on the interlock diagrams. Pilot lights shall be manufacturer's standard unit, oiltight. Pushbutton station shall be momentary contact type with green start button, red stop button, and a legend plate. Selector switches shall be standard knob maintained contact type with legend plates. Pilot lights shall be 120 volt lamps, with green glass color cap.
F. Starters and switches shall be labeled in accordance with Section 16195, Electrical Identification.
G. Starters for motors 50 H.P. and larger shall have capacitors built in to correct the power factor to a minimum of 85% at 75% load factor. Capacitors shall be connected between the contactor and the overloads.
H. Starters for motors larger than 30 HP shall be part-winding type reduced voltage starters, unless otherwise noted.
07 CONTACTORS
A. Contactors shall be of magnetic type, mounted in NEMA Type 1 general purpose enclosure, U.L. listed, and rated for over 100,000 cycles.
B. Contacts shall be double break, silver alloy. They shall be convertible from normally open to normally closed, or vice versa, without removing any wiring. All contacts shall be color coded to indicate status. Coils shall be of molded construction and rated for continuous duty. Terminals shall be provided with pressure wire connectors.
08 DRIP PANS
A. Where possible to run elsewhere, do not run mechanical piping directly above electrical or electronic work which is sensitive to moisture; otherwise, provide drip pans under mechanical piping, sufficient to protect the electrical work from drippage. Locate pan immediately below piping and extend a minimum of 6" on each side of piping and lengthwise 18" beyond the being protected. Fabricate pans 2" deep of 16 gage reinforced galvanized sheet metal with rolled edges and soldered or welded seams. Provide 3/4" copper drainage piping, properly discharged.
PART 3 - EXECUTION
09 INSPECTION
A. Check each piece of for defects verifying that all parts are properly furnished and installed, that all items function properly, and that all adjustments have been made.
010 INSTALLATION
A. Mechanical work shall include the setting in place of all motors. Wiring shall be furnished and installed by Division 16, Electrical.
B. Starters, switches, and contactors which are not furnished as an integral part of mechanical shall be delivered, at the job site, to the Installer of electrical equipment. Mounting and wiring of all starters, switches and contactors shall be by Division 16.
C. Control wiring less than 120 volts shall be installed under this Division. Wiring, wiring devices, etc. shall comply with Division 16 Specifications and installation shall otherwise comply with the applicable edition of National Electrical Code.
D. Power wiring and control wiring 120 volts and above shall be installed under Division 16. Contractor shall provide wiring diagrams, submittal data, etc. to the electrical installer and shall otherwise coordinate this work.
END OF SECTION
