Harbor-Freight 3 in 1 Motors?

As far as I know, ground is on the schematic as P.E.

The standard harness with one wire left unconnected seems like the most likely theory.
 
OK, here's what I did: Hooked up my multimeter in continuity test mode and checked the Green [110v input]wire - no ground. (That was pretty obvious). The Green/Yellow wire with the "E" label - got ground to both motor frames, the enclosure, the machine frame, ways, gears, etc. The two unmarked Green/Yellow wires - no ground.

So, I knew I had to attach the input Green wire to the enclosure, and the Green/Yellow "E" wire as well. Taking Robert at his word, I also attached the other two Green/Yellow wires to the enclosure stud as well.

Plugged it in, started it up...Both motors turn over, forward and reverse, indicator light comes on, shutoff works.

I'm guessing it's 'right'...

Thank you all again for your help! :)

wiring5a.jpg
 
Richie B. said:
Sorry; I should have been clearer - I put the tape on the wire ends. They all have a small ring connector on the end. Pic below - View attachment 90732 When I took the metal shield off, the wire rings were not connected to anything, but a small nut fell out. There is one screw for the 'panel' that is longer than the other three. I taped up the wire ends to see if the motors would run without them. They do - both forward & reverse. I can only guess that they are grounds for each individual motor, and that when I unscrewed the 'panel' to replace the plastic grommet nut for the input 110v wires, a small metal nut fell off and the wires came loose. I have the small metal nut. I'm going to test continuity between each motor body and the end of any of the wires and see if they are 'grounds'. That is about the limit of my diagnostic skills in electric circuits. Everything seems to work without the wires being connected to anything.
Click to expand...
Your assumption is correct, all four wires should be bolted to the frame of the machine. While everything "works" without the ground wires being attached, it does not provide a safe return path to ground in the event of an electrical short within the equipment.
 
BTW: If you're wondering why an 'electrically challenged' dummy like me is poking around in electrical enclosures, it's because on the 44142 3in1, the gears for changing the feed are in the enclosure. They have to be manually unbolted, removed, and exchanged. There is some oil seepage into the 'sump' of the enclosure which I periodically wipe out.

Last time I was threading a shaft, I noticed chips in the sump. Looking around for entrance areas was when I saw the input wire grommet had worked loose and was letting chips in. It's about a one inch hole, and the input wires were resting on the sharp edge of the steel enclosure.

So that's why I was poking around in electrical boxes. :D

enclosure.jpg

enclosure.jpg
 
Last edited:
Not actually always. In electronic equipment, it may be used for example on the center-tap of the 6.3 VAC filament winding of a filament or power transformer. And may or may not be grounded, depending. But in electrical (as opposed to electronic) equipment, it would be a fairly safe assumption that it meant safety ground on any equipment not made in North America, where the standard is Green with no stripe.

Robert D.

John Hasler said:
Green/yellow is always ground. http://en.wikipedia.org/wiki/Electrical_wiring#Colour_code
Click to expand...
 
wa5cab said:
Not actually always. In electronic equipment, it may be used for example on the center-tap of the 6.3 VAC filament winding of a filament or power transformer. And may or may not be grounded, depending. But in electrical (as opposed to electronic) equipment, it would be a fairly safe assumption that it meant safety ground on any equipment not made in North America, where the standard is Green with no stripe.

Robert D.
Click to expand...

In electronic equipment all bets are off as to color codes.

Green-no-stripe is by far the most common for safety ground in the USA but green-yellow is allowed by the code, as is bare.
 
You must log in or register to reply here.
Back
Top