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Naonak

Member
Dec 22, 2015
808
1,377
Kansas
I have installed a second HPWC in my garage and I'm upgrading my circuit to a 100a to feed both chargers. I plan on putting the signaling wire between the two - the manual calls for an 18awg TP shielded wire.

Does anyone know what the best wire to use for this is? I have tons of CAT5e and CAT6 wire around, but it's all 22 or 24 AWG. Looking into 18AWG wire, I find that the TP variety is unreasonably and ridiculously expensive, whereas the non-twisted version is super cheap. What kind of signaling is going through those wires and does it really need a twisted wire? Is the signaling that fragile that a little interference is going to cause it to fail?

Any experience that people have with the install of multiple HPWCs would be great, or any suggestions on how to proceed!

Thanks!
 
If anyone in the future wants to use 18 AWG single twisted pair, it's often marketed as in-wall speaker wire. Any low-voltage installer will have it on hand which is probably why Tesla specifies it. Belden 5300UE would be a good example. Not all in-wall speaker wire is twisted but the good stuff is. I'm certain any Cat3+ or similar should also work well, and if you're paranoid you can group up the pairs to get the equivalent of 18 AWG.
 
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Daniellane

The Tesla Guy
Supporting Member
Aug 13, 2017
2,831
3,827
Camas, Washington
I have installed a second HPWC in my garage and I'm upgrading my circuit to a 100a to feed both chargers. I plan on putting the signaling wire between the two - the manual calls for an 18awg TP shielded wire.

Does anyone know what the best wire to use for this is? I have tons of CAT5e and CAT6 wire around, but it's all 22 or 24 AWG. Looking into 18AWG wire, I find that the TP variety is unreasonably and ridiculously expensive, whereas the non-twisted version is super cheap. What kind of signaling is going through those wires and does it really need a twisted wire? Is the signaling that fragile that a little interference is going to cause it to fail?

Any experience that people have with the install of multiple HPWCs would be great, or any suggestions on how to proceed!

Thanks!
Doing this installation tomorrow. Had the same wire question. ~30’ run.
Just got back from my local Home Depot.
Only 28 cents per foot for 18 gauge shielded 2 conductor. Under $17 for 60 feet.
00AD818F-673E-4E79-9E6B-1487F872D9DC.jpeg
 

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