What does motor frame size ND160L represents? What is the frame size of induction motor?

If an existing motor is to be replaced with a new motor for the same driven system, the following things should be matched.

1. The vertical distance between the ground and the center of the motor shaft.
2. The distance between motor foot bolt holes lying parallel and perpendicular to the shaft axis must be the same.
3. The power rating should be the same.

To ease the above process, International Electrotechnical Commission (IEC) standardized the motor frame size with a frame code.

For example, FRAME ND 160L is engraved in the motor nameplate, 160 represents the vertical distance between the ground and the center of the motor shaft, L represents “large”. L for large, S for short, and M for medium represents the extent of the distance between two bolt holes lying parallel to the axis of the motor shaft.