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I am installing a wall charger 150 ft from the panel. What guage wire should i use?
- Thread starter ajmacho95
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Operator64
Member
perfect advice
Sometimes you have to speak the language so they will understand without clouding the waters.
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You still are not providing the information someone might need to try to help you. Are you installing in conduit? are you running it in the wall, or surface mount?
Or, said another way, given how you are asking you likely should engage an electrician.
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Cheburashka
Active Member
What's the deal with all the condescending replies?
6/3 with ground THHN.
Nassau Cable has good prices. I would use outdoor rated cable and still put it inside some flex conduit. Make sure to use lube to snake the wire through.
nassaunationalcable.com
This would work well.
6/3 with ground THHN.
Nassau Cable has good prices. I would use outdoor rated cable and still put it inside some flex conduit. Make sure to use lube to snake the wire through.
6/3 Unshielded VNTC Tray Cable W/ Ground TC-ER THHN Insulation PVC Jacket 600V
6/3 W/GROUND THHN/PVC Power TC-ER Applications: Tray Control Cable THHN/PVC 600V is an electrical cable suitable for all cable trays indoors and outdoors. THHN/PVC tray cables perform identically well in moist and dry locations. The cable is rated at 90°C for dry and 75°C for wet applications...
nassaunationalcable.com
This would work well.
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What's the deal with all the condescending replies?
6/3 with ground THHN.
Nassau Cable has good prices. I would use outdoor rated cable and still put it inside some flex conduit. Make sure to use lube to snake the wire through.
6/3 Unshielded VNTC Tray Cable W/ Ground TC-ER THHN Insulation PVC Jacket 600V
6/3 W/GROUND THHN/PVC Power TC-ER Applications: Tray Control Cable THHN/PVC 600V is an electrical cable suitable for all cable trays indoors and outdoors. THHN/PVC tray cables perform identically well in moist and dry locations. The cable is rated at 90°C for dry and 75°C for wet applications...
This would work well.
You cant surface run THHN, so since we dont know how this person is planning on installing it, that may or may not be the appropriate wire. I dont find it condescending to say "you arent providing the information needed to answer your question", but perhaps you see that differently.
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Thanks i am having a contractor do the install. I am buying the wire so as to use my credit card for material.However he told me to buy 8/3. Obviously i am not the professional it just seems 6/3 would be better. I dont want to save a coupl hundred and have problems later.What's the deal with all the condescending replies?
6/3 with ground THHN.
Nassau Cable has good prices. I would use outdoor rated cable and still put it inside some flex conduit. Make sure to use lube to snake the wire through.
6/3 Unshielded VNTC Tray Cable W/ Ground TC-ER THHN Insulation PVC Jacket 600V
6/3 W/GROUND THHN/PVC Power TC-ER Applications: Tray Control Cable THHN/PVC 600V is an electrical cable suitable for all cable trays indoors and outdoors. THHN/PVC tray cables perform identically well in moist and dry locations. The cable is rated at 90°C for dry and 75°C for wet applications...
This would work well.
Last edited by a moderator:
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thx i am having a contractor do the install the wire will be inside and underground for about 15feet but we will put the wire in pvc while underground
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the wire will be under the house for about 25ft then undreground for about 10-15 feet then in the attic for the remainder. Down the inside of the wall and out, connecting to the charger from there
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Gauss Guzzler
Safety Score = 42
For a 40A charge on a 50A circuit you can *generally* use individual strands of #6 THHN in metal/plastic/rigid/flexible conduit, or any type of 6/2 or 6/3 multiconductor molded cable. All modern wall chargers are 240V-only, meaning that they do not have a Neutral terminal so you only need 2 conductors ("/2") plus #10 ground. Use loose wires in conduit if practical, metal clad "MC" cable for more difficult runs, or Romex "NM" cable for the cheapest/easiest installation - but note that Romex can only be run inside a wall, attic, or basement. There's also an underground "UF" form of Romex which may be easiest for your application.
But your case isn't "general" at 150ft. Here you should check that the voltage drop is below NEC's 3% guidance:
But your case isn't "general" at 150ft. Here you should check that the voltage drop is below NEC's 3% guidance:
- #6 resistance is 0.49 Ohm/1000 ft
- 150' run thru 2 conductors totaling 300 feet
- 0.49 Ohm x 300'/1000' = 0.147 Ohms
- Voltage drop = Current x Resistance = 40A x 0.147 Ohms = 5.9V
- 5.9V / 240V = 2.5% voltage drop
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Midnightsun
Active Member
Install #4 copper just in case you want to increase the power output in the future, this also happens to be the largest size the Tesla Wall connector can accept in its lugs.
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Contractor but hes installed tesla chargers before juat not this far away. Hes also remodeled my 2 of my units andd done so much work for me. So a few pointers and he'll be good
Last edited by a moderator:
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I was going to use romex . If thats not good which should I use? FYI I am making sure my contractor uses the correct materials
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I believe the post you quoted from @Gauss Guzzler has the specific recommendations they are making regarding cabling.
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Cheburashka
Active Member
Definitely use 6/3.
Personally I would use the wire I linked, but there's different options that will work.
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Operator64
Member
Ahhhhh I would highly suggest a QUALIFIED licensed and insured electrician the house you save could be your own
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