Looking for historical information on pre-NEMA Century Electric motor frame sizes. Specifically the "lettered" frame sizes in wide use prior to the mid 1920s. I collect these old motors and would like to better understand the rhyme and reason behind the nomenclature.
Examples:
M7
M6X
RM10
P2
P10B
RS6
10L
6H
6J
Examples:
M7
M6X
RM10
P2
P10B
RS6
10L
6H
6J
Attachments
-
1.3 MB Views: 5
-
2.5 MB Views: 6
-
2.3 MB Views: 5
-
1.3 MB Views: 6
-
2.7 MB Views: 6
-
799.7 KB Views: 6