CA-ON Multi-conductor wire

[Susquatch]

The video I watched showed two wiring schemes. One with 5 conductors and the other with just 3.

I'd bet one is with power feed through the switch, and the other is separate to power input and just switches the capacitor connection.

 

[trlvn]

I'd bet one is with power feed through the switch, and the other is separate to power input and just switches the capacitor connection.

Nope, it switches power too. The scheme is explained in the last section of this video:

You need to watch the whole video though. BTW, his 5 conductor/3 conductor wiring schemes are specific to a certain style of rotary drum switch operating a 240 V single phase motor. The approach would be different for a 120 V system and very different again for a 3 phase motor.

AIUI, which no sane person should rely on, is that the 3 wire solution works in a somewhat similar fashion to a 3-way light circuit. Power needs to pass through the run windings but polarity doesn't matter. Polarity does matter to the start windings since that gets the motor to start turning the desired direction. So Forward and Reverse on the switch changes the polarity of the start winding and connects both hots to the run winding. At least that's how I'm seeing it. Watch the video...2, 3, 4 times? I may actually try this if the ice storm keeps us inside this weekend.

BTW, the presenter puts a disconnect ahead of the drum switch for safety. When the drum switch is "Off", there is still a live circuit to one of the hots. There are other styles of drum switch where this wouldn't be necessary.

Craig
(Consult an actual electrician--which I am certainly not--if there is any doubt.)

 

[Aarknoid]

I'll finally grok how it works with only 3 leads to the motor.

Sorry, unrelated but wanted to recognize Heinlen scifi reference.

 

[Susquatch]

Watch the video...2, 3, 4 times?

Uhg.......

Might be easier to poke my good eye out with a sharp stick.

I'm not sure I even have the courage to watch it once!

I'm too tired tonight. Maybe tomorrow!

 

[trlvn]

Sorry, unrelated but wanted to recognize Heinlen scifi reference.

I can't find an emoji for 'taking a bow'?

Craig
(I enjoyed Heinlein's writing years ago but I think grok has passed into the general lexicon now. Right?)

 

[BaitMaster]

Digikey is one of the best companies out there to deal with. The amount of crap I’ve fixed by ordering parts from them would make any guys knees weak. Like fixing million dollar machines with a 10 cent part and 8$ of shipping, but a whole bunch of times over and over for years. I love them.

Them and automation direct.

I would have a real hard time giving either of those companies up for any reason….. no Canadian equivalents that I know of. Not even close.

I love them. LOL.