A-A-1 943B
3.2.2 Voltage and frequency. Unless otherwise specified the motor for the fans shall be designed for a rated voltage of 120 volts alternating current +/- 10 percent and a rated frequency of 60 hertz + 5 percent.
3.2.3 Insulation. Insulation shall be Class A or B in accordance with National Electrical Manufacturers Association (NEMA) Standard No. MC-1.
3.2.4 Switch. The switch shall have one off and not less than two on speed positions.
3.2.5 Power cord and Plug. The flexible cord shall be rated for use at a voltage not less than the rated voltage for the type as specified in paragraph 3.2.2 of this document. The fans shall be furnished with a three wire power supply cord with an integral ground. The power supply cord shall have a minimum overall length of eight feet. The power supply cord shall be terminated with the plug style as specified in paragraph 2.1, Table 1.
3.2.6 Blade assembly. The blade assembly shall consist of a complete air screw having at least three impact resistant plastic blades molded together with a hub or central support.
3.2.7 Guard and protective housing. The guard or protective housing shall completely enclose the face, perimeter and reverse side of the fan blades and associated moving parts. Additionally, the guard or protective housing shall be designed to permit access to the blade assembly and associated moving palm without the use of special purpose tools.
3.2.8 Tilt adjustment. The tilt adjustment shall operate through a minimum angle range of 180 degrees, from straight up to straight down. The tilt angles shall be construed as angles formed by the motor shaft axis and the horizontal plan.
3.2.9 Codes and standards. Fans shall conform to the applicable requirements of the codes and standards specified in 3.2.9.1 through 3.2.9.3.
3.2.9.1 NFPA. Wiring shall conform 10 National Fire Protection (NFPA) Standard No. 70, The National Electrical Code.
3.2.9.2 NEMA. Motors shall conform to National Electrical Manufacturers Association (NEMA) Publication No. MG-I .
3.2.9.3 UL. Fans shall conform to the requirements of Underwriters Laboratories Inc. (UL) Standard No. UL 507.
3.3 Materials. Materials not specified herein shall be of the quality specified by the manufacturer and shall conform to the manufacturer’s own drawings, specifications, standards, and quality assurance procedures.
3.3.1 Finish and color. The fans shall be finished according to the manufacturer’s standard commercial practice.
3.4 Performance. The fans shall conform to performance requirements expressed in paragraphs 3.4.1 through
3.4.3.
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