A Common Electrical Mistake

Bryan demonstrates A Common Electrical Mistake. It is common for techs to mix up compressor common with capacitor common or transformer common. Be uncommon and don't make these common errors.

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[mrgreen]

I've started in the trade doing commercial HVAC, so residential seems like it should be easier to understand, but doesn't seem like it to me lol.

[dannycalk]

Great explanation, of telling how it is done. Don't forget the common on a 3-phase delta breaker. Take care these delta breakers are and can be killers.

[m.garcia]

This is where schematics come in. If your unsure refer to schematic. Once you hook up the terminals wrong and short the compressor you will never forget. It's all part of the learning process!

[bikerbobcat]

I still have trouble finding which terminals are start/run because the plugs are so hard to remove and the comps are way down in the bottom of condensers.

[hvacservicementor]

Turns out, common is pretty common! Don't forget about the Com terminal on a spdt switch!

[TheTommyboy]

We've all had to let tbe Smoke out a time, or two.

[danielj.patterson]

Am I the only one that keeps wincing whenever they say “high voltage”? High voltage is reserved for 600+ Volts. So a 24V transformer, or a 120V outlet and a 240V capacitor are all common “domestic” voltages. High voltage is reserved meaning you’re going to need special tools, special PPE and in general there will be a fence or a placard designating high voltage as such. It will all carry enough amperage to kill you so treat it as such, you don’t have to say something is “high” voltage because it carries two hot legs. It’s actually lowering the amperage draw on each leg to lessen the load on the motor.

[cranium]

How about guys wiring in a 3 pole contractor and not check phase rotation.

[scrambler]

I had this kick my ass on one of the first compressor change-outs I ever did back in the day, couldn't understand why the brand new scroll wasn't doing anything - after swapping the wires and having it fire up I just kinda stood there confused and then looked at the old wiring diagram and put two and two together....like you said, I assumed 'common was common'.

[DOWNUNDER.]

After forty years in the trade my head is around what your saying. But it it still sounded like "Whose on first"
If you have no idea what Iam talking about google whose on first.
Iam not being critical i couldn't of explained it any better, and probably not as well.
I just see humour everywhere

[dangda-wwde]

What were u just saying there, i didnt get it.

[davidkarpen]

Probably the most important electrical lesson in hvac ever

[blackishpariah]

Over here looking like a blue collar Mr Beast

[lesliedaisley]

Bro I would love to work alongside you you are like a HVACR fountain

[jericosha]

I love the graphic illustrations. I screenshot them and keep them in a folder for reference

[dannycalk]

Does this mean that S and R come together inside the compressor, there by letting the herm wire apply the power boost to the R terminal to give it that extra kick that it needs to get started. ??

[Matts_Crafty]

when in doubt read the schematic or find it.... Great video!

[saurisco]

01:05 what's the 2 PRs in the scheme?
And what is RC (run capacitor?) and why is it connected that way?
Thank you in advance you're great 👍🏻

[randywaldrep]

It helped me a bunch my C wire came off of the Capacitor.

[darkhourent]

Capacitor gets power from what leg the compressor run is on .