A standardized table detailing physical dimensions for electric motors manufactured according to standards set by the National Electrical Manufacturers Association (NEMA). These tables are often distributed in Portable Document Format (PDF) for ease of sharing and accessibility. The information contained allows engineers and technicians to quickly determine the mounting compatibility and overall size of a motor, crucial for design, replacement, and maintenance activities. For instance, a user can consult such a chart to confirm if a replacement motor with a specific frame designation will fit into an existing piece of equipment.
Reliance on these charts streamlines equipment design and maintenance. The standardization reduces the need for custom motor mounts and allows for simpler motor replacement procedures. Their historical context stems from the need to ensure interchangeability between motors produced by different manufacturers, thereby fostering competition and innovation within the motor industry. This common reference also lowers costs associated with custom engineering for each application.
