Instructions / Assembly

NBK Motor Installation and Safety Instructions

General Information

High voltages and moving parts around motors and motor driven equipment can cause serious or fatal

injuries, so be careful when installing, operating and maintaining electrical equipment. Be familiar with

and follow all local electrical and safety codes, as well as NEMA MG2, (Safety Standard for Construction

and Guide for Selection, Installation and Use of Electrical Motors and Generators), the National Electrical

Code (NEC), and the Occupational Safety and Health Act (OSHA).

Copies of the National Electrical Code may be ordered from the National Fire Protection Association on

their web site: www.nfpa.org, or contact your local government inspection agency. NEMA Standards

(including MG2) may be ordered from the National Electrical Manufacturers Association, on their

website: www.nema.org. Contact the U.S. Government Department of Labor for availability of OSHA

requirements.

For hazardous locations (explosive atmospheres) as defined by Article 500 of the NEC and local codes, an

explosion-proof motor may be required. Refer to both Article 200 of the NEC and your local government

inspection agency or insurance company inspector for guidance and detailed information on proper

motor selection and protection.

Most motors are equipped with thermal protectors which prevent damage due to overloading and

stalled conditions. These motors have the words “Thermally Protected” on the nameplate. The

protector may be of the automatic or manual type. An automatic protector turns the motor off if it is

overloaded or operated under abnormal conditions; after a cool down period it turns the motor back

on. Motors with manual protectors have a red button which pops up if the protector trips. After a cool

down period the protector can be re-set by pushing this button until a click is heard. The motor will then

re-start immediately.

MOTORS WITH AUTOMATIC RESET THERMAL PROTECTORS SHOULD NOT BE USED WHERE UNEXPECTED

STARTING OF THE EQUIPMENT MIGHT CREATE A HAZARD, APPLICATIONS SUCH AS POWER TOOLS,

FOOD CHOPPERS, ETC. SHOULD USE MOTORS WITH MANUAL RESET PROTECTORS.

Motors not provided with thermal overload protection should be installed using proper remote

overcurrent protection against burnout under abnormal conditions of above-rated load or a stalled

motor. Selection of this device should be done by a qualified electrician.

All moving parts must be guarded to prevent personal injury. Guard all propeller fans, exposed blowers,

couplings, belts, sheaves, flywheels, and etc. Keep fingers and foreign objects away from ventilation and

other openings. Do not insert any object into the motor. Remove the shaft key before running the motor

without a connected load to avoid the key flying out. (Caution: shaft keyway edges are sharp) Be careful

when touching the exterior of a motor that is in use, as it may be hot enough to be painful or cause

injury. This condition is normal for most motors when operated at rated load and voltage.

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NBK Motor Installation and Safety Instructions General Information High voltages and moving parts around motors and motor driven equipment can cause serious or fatal injuries, so be careful when installing, operating and maintaining electrical equipment.
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Initial Motor Inspection: • After opening the shipping carton, check the nameplate and general construction features to confirm the correct motor or blower was received. • Inspect the motor for damage. If damage is detected, the motor should be placed back in the shipping carton, and a claim filed with the carrier immediately. Do not attempt to install or use a damaged motor.
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Connecting Power to the Motor: CAUTION! Connecting line voltage to two of the “Speed” lead wires (i.e. the High Speed and the Low Speed) will burn the motor winding creating a fire or shock hazard. Should this occur, even for a short period, the motor must be thoroughly inspected for damaged coils by a qualified motor service shop before being put into use. CAUTION! Make sure lead wires are secured to prevent contact with moving parts in the equipment.