My knowledge of motors is embarrassingly limited. I need to install a cord and plug to a 115/230V, 1/2 HP Dayton 6K039 hazardous location definite purpose motor. It's to be plugged into a standard 120V wall receptacle. It has seven leads: P1,P2,T8,T3,T2,T5,T4. The high voltage skematic shows P1 as the ungrounded line, P2 is designated "tape", T8,T3,and T2 are to be taped together and finally T5 and T4 are designated line. Does this mean that P1 is my neutral, P2 is capped off, T8, T3 and T2 are spliced together and T5 and T4 are spliced to the hot leg of my cord? There is also a low voltage skematic showing P1 as the ungrd. line again but now P2, T8 and T3 are shown to be taped and T2,5 and 4 as line. Any help would be greatly appreciated.
Help w/ Motor Hook Up
- Thread starter ddcawley
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Ed MacLaren
Senior Member
Re: Help w/ Motor Hook Up
There are different connections for thermally protected single phase motors, depending on whether or not the start-winding current flows through the thermal protector's heater.
The P2 lead is a by-pass around the heater. Any current drawn by windings connected to it does not flow through the heater.
In the high-voltage connection that you have described above, the start-winding current does flow through the thermal protector's heater. This can sometimes result in the protector tripping if the motor starts repeatedly.
This is the connection (below) I have most often seen for general purpose motors. In this one the start-winding current does not flow through the thermal protector's heater.
Ed
[ June 26, 2004, 08:02 PM: Message edited by: Ed MacLaren ]
There are different connections for thermally protected single phase motors, depending on whether or not the start-winding current flows through the thermal protector's heater.
The P2 lead is a by-pass around the heater. Any current drawn by windings connected to it does not flow through the heater.
In the high-voltage connection that you have described above, the start-winding current does flow through the thermal protector's heater. This can sometimes result in the protector tripping if the motor starts repeatedly.
This is the connection (below) I have most often seen for general purpose motors. In this one the start-winding current does not flow through the thermal protector's heater.
Ed
[ June 26, 2004, 08:02 PM: Message edited by: Ed MacLaren ]
- Location
- Illinois
- Occupation
- retired electrician
Re: Help w/ Motor Hook Up
ddcawley,
Don
ddcawley,
If you have a standard receptacle why do you need an expensive hazardous location motor?
Don
stew
Senior Member
- Location
- federal way,washington
Re: Help w/ Motor Hook Up
soeeyr ed I hope you didnt read my first post. my eyes were not fucused right and I misread the diagram. Good call.I think baldor does it the other way and leaves the thermal always in the total circuit. Will try to confirm that if I can ever find my darn baldor diagram book.
[ June 27, 2004, 01:36 AM: Message edited by: stew ]
soeeyr ed I hope you didnt read my first post. my eyes were not fucused right and I misread the diagram. Good call.I think baldor does it the other way and leaves the thermal always in the total circuit. Will try to confirm that if I can ever find my darn baldor diagram book.
[ June 27, 2004, 01:36 AM: Message edited by: stew ]
stew
Senior Member
- Location
- federal way,washington
Re: Help w/ Motor Hook Up
You also need to check article 501.3(B)(6). It would be better if this is some ind of portable operation to run the cord out to a plug that was not within the hazardous location.
You also need to check article 501.3(B)(6). It would be better if this is some ind of portable operation to run the cord out to a plug that was not within the hazardous location.
Re: Help w/ Motor Hook Up
If this is a hazardous location then the lights, switches, receptacles etc. in the room would need to be explosion proof, with appropriate conduit, j-boxes, conduit seals etc. Not just the motor. (Sounds like you are trying to use a EP motor in an area with general purpose wiring.)
[ June 28, 2004, 11:24 PM: Message edited by: sparkie001 ]
If this is a hazardous location then the lights, switches, receptacles etc. in the room would need to be explosion proof, with appropriate conduit, j-boxes, conduit seals etc. Not just the motor. (Sounds like you are trying to use a EP motor in an area with general purpose wiring.)
[ June 28, 2004, 11:24 PM: Message edited by: sparkie001 ]
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