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Deal.ai › Southwire › Electrical Cables
Southwire
Southwire 50' 12/3 NM W/G Indoor Wire Purple

Southwire 50' 12/3 NM W/G Indoor Wire Purple

Best price now

$129.99at Ace HardwareChecked Nov 10

Compared across 3 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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Price facts

  • Last seen at $129.99 at Ace Hardware on Nov 10.
  • Checked at 3 stores.

Our take on the Southwire 50' 12/3 NM W/G Indoor Wire Purple

This is a 50-foot coil of Southwire 12/3 NM-B non-metallic sheathed cable with a bare ground wire, in purple. The 12-gauge copper conductors handle 20-amp circuits, so it suits kitchen, laundry and other general-purpose branch wiring inside walls and ceilings. It is the standard Romex-style cable most electricians reach for, and it costs more per foot than 14/2 because it carries more copper and an extra conductor. Buyers pick 12/3 when a circuit needs a neutral at the switch or a 240-volt feed; for plain 20-amp outlets, 12/2 does the same job with less bulk and less copper.

Best for20-amp branch circuits in kitchens, baths and laundry roomsWiring a switch loop or smart switch that needs a neutral240-volt runs to a water heater or baseboard heaterIndoor runs through studs, joists and ceiling cavities
Pros
  • 12-gauge copper supports 20-amp circuits
  • Three conductors plus ground cover switch loops and 240V loads
  • NM-B sheath is rated for dry indoor locations
  • Purple jacket makes the run easy to identify in a crowded panel
  • Sold in a 50-foot coil that handles most single-room runs
Cons
  • Not for wet locations, outdoors or buried conduit
  • Stiffer and harder to pull than 14/2
  • More copper and an extra conductor than 12/2, so it costs more
  • Cut lengths are not returnable once uncoiled

Southwire 50' 12/3 NM W/G Indoor Wire Purple prices at every store

  • Ace HardwareNew

    In stock

    $129.99Free shippingChecked Nov 10
    Visit Ace Hardware
  • Lowe'sNew

    In stock

    $137.00Free shippingChecked Nov 10
    Visit Lowe's
  • Blain's Farm & FleetNew

    In stock

    $169.99Checked Nov 10
    Visit Blain's Farm & Fleet

Store links may earn us a commission. Some prices via Klarna.

Southwire 50' 12/3 NM W/G Indoor Wire Purple price history

$129.99$129.99
Nov 9Nov 10

Lowest price we've seen: $129.99 on Nov 9 at Ace Hardware. Tracked across 3 stores since Nov 9.

What reviewers say

Electricians and DIYers treat Southwire NM-B as the baseline cable: the jacket strips cleanly, the conductors are true 12-gauge and the ground is included. Complaints center on stiffness in cold weather and on the price premium over 12/2 for jobs that don't need the third conductor.

What people mention
  • JacketPraisedOwners say the sheath strips cleanly and holds up to pulling through studs.
  • GaugePraisedBuyers confirm the conductors are true 12-gauge copper.
  • StiffnessCriticisedReviewers find it stiff and hard to work with in cold weather.
  • ValueMixedSome say the extra conductor is worth it for switch loops; others call it overkill for plain outlets.
  • Coil memoryCriticisedThe wire keeps its curl, which makes it awkward to fold into small boxes.

From Ace Hardware

  • 50 ft. length
  • Romex Type NM-B non-metallic sheathed cable
  • With ground wire

About the Southwire 50' 12/3 NM W/G Indoor Wire Purple

This is a 50-foot length of Southwire 12/3 indoor electrical wire with a ground. It is Romex Type NM-B non-metallic sheathed cable.

The sheath is purple.

Length
50 ft.
Wire size
12/3 with ground
Type
Romex NM-B non-metallic sheathed cable
Use
Indoor
Color
Purple
Brand
Southwire

Specifications

Color
PurpleSource

Questions and answers

Is 12/3 the right cable for a 20-amp circuit?
Yes. The 12-gauge conductors are rated for 20-amp circuits. The third conductor is there for a neutral at the switch or a 240-volt load, not for extra amperage.
Can I use this outdoors or underground?
No. NM-B is rated for dry indoor locations only. For outdoor or buried runs, use UF cable or conduit-rated conductors.
What is the difference between 12/2 and 12/3?
12/2 has black, white and ground. 12/3 adds a red conductor, which lets you run a switch loop with a neutral or feed a 240-volt appliance. Both carry 20 amps.
Can this go in conduit?
It can be run in conduit indoors where code allows, but the sheath makes it bulky. Many electricians pull individual THHN conductors instead.
What is in the box?
One 50-foot coil of 12/3 NM-B cable with a bare ground wire. Boxes and staples are not included.
Where is the Southwire 50' 12/3 NM W/G Indoor Wire Purple cheapest?
At Ace Hardware, for $129.99, as of our latest check.
Where can I buy the Southwire 50' 12/3 NM W/G Indoor Wire Purple?
3 stores we checked sell it, including Ace Hardware, Blain's Farm & Fleet, Lowe's.

Stores we've priced the Southwire 50' 12/3 NM W/G Indoor Wire Purple at

  • Ace Hardware deals and prices
  • Blain's Farm & Fleet deals and prices
  • Lowe's deals and prices

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