AS 60034.7:2009 Rotating electrical machines
2.3 Terminal box location
When designated, the terminal box position shall be coded with a final letter in accordance with the following rules:
a) machines with feet shall be viewed from the D-end with the feet at 6 o’clock;
b) machines with flange only and with drains shall be viewed from the D-end and with the drains at 6 o’clock;
c) other configurations shall not have a coding.
3.1 Designation
In Code II, a machine is designated by the Code letters IM (International Mounting) followed by a space and four numerals.
The first, second and third numerals designate aspects of construction (see 3.2 and 3.4).
The fourth numeral designates the type of shaft extension (see 3.3).
When used, a letter following the four numerals shall designate the terminal box position, see 3.5.
3.2 Significance of the first numeral
The significance of the first numeral is given in table 3 below.
3.4 Significance of the second and third numerals
The significance of the second and third numerals is specified in tables 5 to 1 3 depending on the first numeral with which they are associated (see table 3).
3.5 Terminal box location
When designated, the terminal box position shall be coded with a final letter in accordance with the following rules:
a) machines with feet shall be viewed from the D-end with the feet at 6 o’clock;
b) machines with flange only and with drains shall be viewed from the D-end and with the drains at 6 o’clock;
c) other configurations shall not have a coding.
3.6 Examples of designations
In tables 5 to 1 3 common types of construction and mounting arrangements are illustrated by sketches, and their designations are given using a particular fourth numeral. Other fourth numerals could be applicable (see table 4). The absence of a sketch does not imply that a designation is not available.
Numerals to which a significance has been allocated in the appropriate tables may be combined to form a valid designation. Some of these designations may be impracticable.