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frontpage Posted by mkzmkz • Feb 16, 2025
frontpage Posted by mkzmkz • Feb 16, 2025

75-Feet Southwire 8/3 Romex SIMpull Stranded Indoor CU NM-B W/G Wire

+ Free Shipping

$152

$200

24% off
Lowe's
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Lowe's has 75-Feet Southwire 8/3 Romex SIMpull Stranded Indoor CU NM-B W/G Wire (63949207) for $152.28. Shipping is free.

Thanks to Community Member mkzmkz for posting this deal.

Features:
  • Southwire's Romex SIMpull type NM-B may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90°C
  • NM-B cable is primarily used in residential wiring as branch circuits for outlets, switches, and other loads
  • NM-B cable may be run in air voids of masonry block or tile walls where such walls are not wet or damp locations
  • Voltage rating for NM-B cable is 600 volts
  • Copper conductors are annealed (soft) copper
  • Southwire's SIMpull designed for easier pulling, resulting in easier installation
  • UL listed

Editor's Notes

Written by StrawMan86 | Staff
  • 4.6 out of 5 stars rating at Lowe's based on 100+ customer reviews.
  • Refer to the original post & forum comments for additional details & discussion.

Original Post

Written by mkzmkz
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Lowe's has 75-Feet Southwire 8/3 Romex SIMpull Stranded Indoor CU NM-B W/G Wire (63949207) for $152.28. Shipping is free.

Thanks to Community Member mkzmkz for posting this deal.

Features:
  • Southwire's Romex SIMpull type NM-B may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90°C
  • NM-B cable is primarily used in residential wiring as branch circuits for outlets, switches, and other loads
  • NM-B cable may be run in air voids of masonry block or tile walls where such walls are not wet or damp locations
  • Voltage rating for NM-B cable is 600 volts
  • Copper conductors are annealed (soft) copper
  • Southwire's SIMpull designed for easier pulling, resulting in easier installation
  • UL listed

Editor's Notes

Written by StrawMan86 | Staff
  • 4.6 out of 5 stars rating at Lowe's based on 100+ customer reviews.
  • Refer to the original post & forum comments for additional details & discussion.

Original Post

Written by mkzmkz

Community Voting

Deal Score
+26
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Price Intelligence

Model: Southwire 75-ft 8 / 3 Romex SIMpull Stranded Indoor Non-Metallic Wire (By-the-roll) | 63949207

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Sort: Lowest to Highest | Last Updated 7/2/2025, 11:23 AM
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Lowe's$159.98

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Top Comments

mkzmkz
75 Posts
46 Reputation
Most typical use is electrical stove/range. For EV charges, you'd want to go with 6 guage if you can (and your panel allows it).
NeatOstrich900
69 Posts
14 Reputation
Highly recommended to over size wiring for EV charging.
Masejoer
2848 Posts
596 Reputation
And if not hard-wired, a quality 14-50R if going for 40A continuous - not the $10 things sold at the big box stores. $50+ Hubbell HBL9450A or equivalent for reliability.

83 Comments

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Feb 19, 2025
173 Posts
Joined Nov 2009
Feb 19, 2025
sidosido
Feb 19, 2025
173 Posts
Quote from LavenderStar9827 :
Check again dude... Plug in outlets have a neutral.
Tesla has nema 6-50 adapters. The wall connector doesn't have a neutral terminal. The nema 14-50 outlet has a neutral, but it isn't used.
Feb 19, 2025
840 Posts
Joined Jun 2018
Feb 19, 2025
JasonStern
Feb 19, 2025
840 Posts
Obligatory not a licensed electrician, consult a professional, check local building codes, etc. warning.
This is too thin for level 2 charging. My Tesla charger runs 6/3 and even then I cap charging at 32A, even though everything is rated at 50A. When in doubt, go heavier and under utilize it. Bad things are less likely to happen going that path rather than the opposite. And in most cases, the cost differences aren't that significant. Refer to:
https://www.tesla.com/support/cha...installing
That said, this 8/3 would be great for most dryers, convectional ovens, and small campers - devices rated ideally below 30A peak.
Most wires, including this one, is rated to 600V - which you aren't going to get off a typical breaker box. Continuous amperage is what you need to worry about and adjust your wiring size accordingly. Again, when in doubt, go one gauge higher.
2
Feb 19, 2025
840 Posts
Joined Jun 2018
Feb 19, 2025
JasonStern
Feb 19, 2025
840 Posts
Quote from JasonStern :
Obligatory not a licensed electrician, consult a professional, check local building codes, etc. warning.
This is too thin for level 2 charging. My Tesla charger runs 6/3 and even then I cap charging at 32A, even though everything is rated at 50A. When in doubt, go heavier and under utilize it. Bad things are less likely to happen going that path rather than the opposite. And in most cases, the cost differences aren't that significant. Refer to:
https://www.tesla.com/support/cha...installing [tesla.com]
That said, this 8/3 would be great for most dryers, convectional ovens, and small campers - devices rated ideally below 30A peak.
Most wires, including this one, is rated to 600V - which you aren't going to get off a typical breaker box. Continuous amperage is what you need to worry about and adjust your wiring size accordingly. Again, when in doubt, go one gauge higher.
Continuing this (same obligatory warning), there are indoor and outdoor rated wires. Use the appropriate one for your application. Make sure to use a conduit. For outside installations, avoid metallic conduits, as they tend to attract and retain heat during the summer. The goal again is to try to prevent the wire from getting hot enough to melt the insulation and cause a short. Make sure all conduit junctions are properly waterproofed.
Feb 19, 2025
24 Posts
Joined Jul 2023
Feb 19, 2025
LavenderStar9827
Feb 19, 2025
24 Posts
Quote from sidosido :
Tesla has nema 6-50 adapters. The wall connector doesn't have a neutral terminal. The nema 14-50 outlet has a neutral, but it isn't used.
How about you read the message I responded to. And what he responded to. The guy was talking plug-in chargers. Not the hardwired wall connector.
2
Feb 19, 2025
173 Posts
Joined Nov 2009
Feb 19, 2025
sidosido
Feb 19, 2025
173 Posts
Quote from LavenderStar9827 :
How about you read the message I responded to. And what he responded to. The guy was talking plug-in chargers. Not the hardwired wall connector.
Exactly. Plug in chargers don't use the neutral either.
Feb 20, 2025
558 Posts
Joined May 2008
Feb 20, 2025
mstang1988
Feb 20, 2025
558 Posts
Quote from LavenderStar9827 :
All sorts of wrong....
Let's check the ampacity charts. All romex/nm-b has to use the 60c table. For continuous load you use 80% of rating.

55amps * .8 = 44 amps. 44 < 48 amps. You will also be on an 60 amp breaker. This is for copper. It's time to size up to 4awg.

https://media.distributordatasolu...kHerea.pdf

Tell me about this all sorts of wrong though.
2
Feb 20, 2025
558 Posts
Joined May 2008
Feb 20, 2025
mstang1988
Feb 20, 2025
558 Posts
Quote from b67 :
I use #6 thhn
THHN is derated in some situations as well. I don't know them all but I seem to recall when it's in an insulated wall (due to reduced thermal dissipation characteristics), when in a raceway/conduit maybe?, etc.

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Feb 20, 2025
558 Posts
Joined May 2008
Feb 20, 2025
mstang1988
Feb 20, 2025
558 Posts
Quote from Cryotek :
Depends on what you're using it for. They're fine for intermittent use. The problem is with repeated longer duration use like charging an EV, which is exacerbated by using aluminium wiring that expands and contracts more and will short sooner. Just because something meets code doesn't mean it's fit for the purpose it'll be used for. Using a 50a socket for a few hours a year is completely different than using it for 10-20 hours a week.
The conventional wisdom is to use copper wiring, an industrial grade socket (eg Hubbell or similar), and check the wiring of the socket yearly and re-torque to make sure the wire isn't backing out.
This is true or even better, hard wire.
Feb 20, 2025
174 Posts
Joined Jun 2004
Feb 20, 2025
iamhere9
Feb 20, 2025
174 Posts
If you are in Detroit area pronto sells for lot less, much better deal. limited delivery areas though, but you can always pick up

https://proshop.prontohomedeliver...y-the-roll
Feb 21, 2025
7 Posts
Joined Mar 2021
Feb 21, 2025
VioletHose884
Feb 21, 2025
7 Posts
Quote from scraejtp :
All kinds of things. An EVSE (electric vehicle charger) is a typical use. 40A circuit, good for 32A continuous. Typically do not need 8/3 though, 8/2 (no neutral) would be sufficient.
Please don't suggest this. You always need to have a tolerance with your maximum current rating. Get 6 gauge for a 50A flow if you're going to be charging an EV. And please don't suggest using only a 2 wire cable. You need at least ground. Ideally even neutral to be code-compliant to install a GFCI breaker (you're most likely to install this in a garage or wet room) so you need 4 wires.
6
Feb 21, 2025
140 Posts
Joined Mar 2021
Feb 21, 2025
CyanLeopard7900
Feb 21, 2025
140 Posts
Quote from LivelyKestrel847 :
Is this a good deal, ok or a slick deal?
Neither. Regular Menards price is 156 and they brought 11% back…
Feb 22, 2025
167 Posts
Joined May 2014
Feb 22, 2025
Tubageekster
Feb 22, 2025
167 Posts
Quote from SilentAgnostic :
no it's not. 60a breaker for 48a continuous... my wire size is fine.
You're both right, but you're more right. You were referring to a 60 amp breaker and a 48 amp charging rate. That is acceptable with 75 degree wiring methods and 6 AWG wire, which is what you said you installed.
He was referring to an 60 amp charging rate which would require a 75 amp breaker and 4 AWG wire. But that is a very uncommon setup. I don't know of many chargers that charge at that rate. Most are 48 amps max. That's why I say you're more right.
1
Feb 22, 2025
1,727 Posts
Joined Nov 2009
Feb 22, 2025
RonPaulFan
Feb 22, 2025
1,727 Posts
Quote from nalc :
Good price but 8/3 is arguably one of the least useful combinations.
30A dryer or water heater circuits will usually be 10 AWG, and 50A stove or EV charging stations will be 6 AWG.
8/3 is rated for 40 amps which is in no man's land - there aren't any 40A standard receptacles. Typically in a residential applications you would see 8 AWG circuits for like a 4 ton AC compressor, a cooktop or in-wall oven, or a hardwired EV charging station. Of those, only the in-wall oven actually needs the 3rd (neutral) wire so most would use 8/2. Probably why this is on sale.
#8 can be used on a 50A receptacle with a 40A circuit breaker. NEC (National Electric Code) Table 210.24.

Stoves / Ranges rarely have all of their 4 or 5 electric burners on 100% and oven on at 100% at the same time.
Feb 22, 2025
2,111 Posts
Joined Sep 2008
Feb 22, 2025
soarwitheagles
Feb 22, 2025
2,111 Posts
Can I use this 8/3 Romex for 240 volts?

Second time I have asked and still waiting for a clear answer...

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Pro
Feb 22, 2025
858 Posts
Joined Jun 2005
Feb 22, 2025
scraejtp
Pro
Feb 22, 2025
858 Posts
Quote from soarwitheagles :
Can I use this 8/3 Romex for 240 volts?

Second time I have asked and still waiting for a clear answer...
Yes. It will actually provide 120 and 240 if all wires are connected, but 240V only is fine too.

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