malachi constant
Senior Member
- Location
- Minneapolis
I am a consulting engineer and am admittedly ignorant on the finer points of motor controls. Got a question from a contractor this week. My electrical plans called for a combo starter/disconnect for a 5HP 208V/3P motor. The EC has the combo on site, but the motor came with a control cabinet with an integral starter. The EC is suggesting they need to toss the combo and purchase a straight up 30A/3P non-fused disconnect.
My instinct is the combo can still be used, just the starter put in "hand" mode or whatever. This has been a good contractor to work with but they've been "uncertain" when facing the occasional motor schedule oddities. Not in a greedy way, I just get the feeling most contractors know more than I do about these things, and that may not be the case here.
Your collective thoughts are appreciated!
My instinct is the combo can still be used, just the starter put in "hand" mode or whatever. This has been a good contractor to work with but they've been "uncertain" when facing the occasional motor schedule oddities. Not in a greedy way, I just get the feeling most contractors know more than I do about these things, and that may not be the case here.
Your collective thoughts are appreciated!