fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
I'm looking for constructive criticism on the following, and if you think it is merited, support in the form of comments from you on 11-20 Table 430.250. Thanks, Jim Williams
4 Comment:
Table 430.250 Full-Load Current, Three-Phase Alternating-Current Motors
The following values of full-load currents are typical for motors running at speeds usual for belted motors and motors with normal torque characteristics.
The voltages listed are rated motor voltages. The currents listed shall be permitted for system voltage ranges of 110 to 120, 220 to 240, 440 to 480, and 550 to 1000 600 volts.
5 Statement of Problem and Substantiation.
Restore the previous value of 600 volts. The same current for motors that differ in voltage by about a factor of two is unlikely.
Adding a column may be appropriate for higher voltage motors.
It appears to be a case of search and replace run amuck.
4 Comment:
Table 430.250 Full-Load Current, Three-Phase Alternating-Current Motors
The following values of full-load currents are typical for motors running at speeds usual for belted motors and motors with normal torque characteristics.
The voltages listed are rated motor voltages. The currents listed shall be permitted for system voltage ranges of 110 to 120, 220 to 240, 440 to 480, and 550 to 1000 600 volts.
5 Statement of Problem and Substantiation.
Restore the previous value of 600 volts. The same current for motors that differ in voltage by about a factor of two is unlikely.
Adding a column may be appropriate for higher voltage motors.
It appears to be a case of search and replace run amuck.