Southwire 250-ft 12 / 2 / 2 Romex SIMpull Solid Indoor CU NM-B W/G Individual pack ( By-the-roll )

The Southwire 12/2/2 Romex SIMpull NM-B 250 ft is the specialty residential cable that solves the labor-intensive problem of running multiple AFCI-protected branch circuits in new construction bedroom and living area rough-ins. As a 12/2/2 NM-B cable, this product contains four insulated 12 AWG solid copper conductors plus a bare copper grounding conductor, allowing two completely separate 20-amp branch circuits to be installed in a single cable pull from the electrical panel to the destination junction boxes. As the Romex Extra Circuit specification (the proprietary Southwire marketing name for the 12/2/2 configuration), this cable was introduced specifically to address the labor cost of meeting current NEC AFCI requirements, which mandate AFCI protection for nearly all habitable-room 15A and 20A branch circuits in modern residential construction. As a two circuits one cable solution, the Southwire 12/2/2 Romex eliminates the need to pull two separate cables from the panel to the bedroom or living area, cutting cable-pulling labor approximately in half for projects covering multiple rooms with multi-circuit AFCI requirements. As AFCI bedroom wire, the 12/2/2 configuration is the practical labor-saving choice for new construction projects where modern code requires two AFCI-protected circuits per bedroom (typically one for general receptacles and one for adjacent space coverage), and the contractor wants to minimize the rough-in labor across multiple rooms. Every Southwire 12/2/2 Romex SIMpull NM-B 250 ft roll ships nationwide from IB Lighting with free freight. Manufacturer specifications are available at the official Southwire website.

Southwire 12/2/2 Romex Key Highlights

What 12/2/2 Actually Means (And How It’s Different)

The “12/2/2” specification is genuinely unusual in the residential cable lineup, and many electricians who have not encountered this product before find the naming convention confusing. Understanding what 12/2/2 actually contains helps clarify what it does and when to specify it.

The Southwire 12/2/2 Romex contains four insulated conductors plus a bare copper ground, configured as TWO COMPLETELY SEPARATE branch circuits within a single cable jacket. The five conductors total are:

• Black conductor: Circuit 1 hot leg.
• White conductor: Circuit 1 dedicated neutral.
• Red conductor: Circuit 2 hot leg.
• White-with-red-stripe conductor: Circuit 2 dedicated neutral. The striped marking distinguishes this neutral from the plain white Circuit 1 neutral.
• Bare copper conductor: Shared equipment grounding conductor for both circuits.

The naming convention “12/2/2” reads as: 12 AWG conductors, in a 2-conductor configuration (the first “2”), plus another 2-conductor configuration (the second “2”) — meaning two separate two-conductor circuits in one cable. The “with ground” portion is implied by the bare copper ground conductor.

This is fundamentally different from “12/2” cable (which is one circuit with one hot, one neutral, one ground) and from “12/3” cable (which is one circuit with two hots sharing a single neutral, used for three-way switches OR for multi-wire branch circuits). The 12/2/2 is uniquely designed for delivering two genuinely independent circuits through one cable run, which has specific code implications and installation advantages discussed in the sections below.

Four Insulated Conductors Plus Ground: Why Two Neutrals Matter

The defining feature of the Southwire 12/2/2 Romex is that it includes TWO SEPARATE neutral conductors, one dedicated to each of the two circuits. This is the technical distinction that makes the 12/2/2 a genuine two-circuit cable rather than a multi-wire branch circuit.

In a standard 12/2 cable, the single white neutral conductor returns the current from the single hot conductor back to the panel. In a 12/3 multi-wire branch circuit (which superficially looks similar to 12/2/2 because both have two hot conductors), the SINGLE shared neutral carries the imbalance current between the two hot circuits — this only works when the two hots are on opposite phases of the residential split-phase service, and it creates specific code requirements that make MWBC installations more complicated than standard branch circuits.

The Southwire 12/2/2 Romex avoids the multi-wire branch circuit complexity entirely by giving each circuit its OWN dedicated neutral. Circuit 1’s neutral (white) carries only Circuit 1’s return current. Circuit 2’s neutral (white-with-red-stripe) carries only Circuit 2’s return current. The two circuits are electrically independent, with no shared neutral concerns.

This independence matters meaningfully for installation simplicity:

• No phase coordination required: The two circuits can be on the same phase or opposite phases at the panel; either works.
• No handle-tied breakers required: Standard MWBC code requires handle-tied breakers so both circuits disconnect together; 12/2/2 has no such requirement.
• No neutral overload concerns: Each circuit’s neutral carries only its own current, eliminating the rare-but-real risk of overloaded shared neutrals in unbalanced MWBC configurations.
• Independent troubleshooting: Issues with one circuit can be diagnosed and resolved without affecting the other circuit.

12/2/2 vs 12/3: The Critical Difference

The Southwire 12/2/2 Romex and the standard Southwire 12/3 NM-B Romex SIMpull both contain four conductors plus ground (looking superficially similar), but they serve completely different electrical applications. Understanding the difference is essential to specifying the right cable for your installation.

Southwire 12/2/2 Romex (this product): Two SEPARATE circuits in one cable. Black + White = Circuit 1. Red + White-with-red-stripe = Circuit 2. Each circuit has its own neutral. The two circuits are completely independent. Used for running multiple AFCI-protected circuits to bedrooms and living areas in single cable pulls. No handle-tied breakers required.

Southwire 12/3 NM-B Romex SIMpull: ONE circuit with three insulated conductors. Black + Red are two hot conductors. White is the SINGLE SHARED neutral for both hots. Used for three-way switch circuits (where Black and Red carry the switch travelers) OR for multi-wire branch circuits (where Black and Red are two separate hot legs sharing the white neutral). When used as MWBC, requires handle-tied breakers per current NEC.

The practical decision tree: choose 12/3 when you have a single three-way switch circuit OR when you have a multi-wire branch circuit with two hot legs on opposite phases sharing a single neutral. Choose 12/2/2 when you need two genuinely independent branch circuits in a single cable run, particularly for AFCI applications in new construction.

For three-way switch installations and applications where multi-wire branch circuit configuration is intentional, browse the Southwire 12/3 NM-B Romex SIMpull 250 ft. For two-separate-circuit installations in new construction, the Southwire 12/2/2 Romex (this product) is the right specification.

AFCI Bedroom Requirement: The Labor Case for the Southwire 12/2/2 Romex

The primary driver behind the introduction of the Southwire 12/2/2 Romex was the expansion of NEC Article 210.12 AFCI (Arc-Fault Circuit Interrupter) requirements in new residential construction. Understanding the AFCI code requirements clarifies why the 12/2/2 configuration delivers meaningful labor savings.

Current NEC Article 210.12 requires AFCI protection for all 15-amp and 20-amp branch circuits supplying outlets and devices in: bedrooms, dwelling unit living rooms, dining rooms, family rooms, parlors, libraries, dens, sunrooms, recreation rooms, closets, hallways, laundry areas, kitchens, and similar habitable rooms. This is nearly every room in a modern home, and the requirement applies to all new construction and to most major renovations.

The practical consequence: modern residential new construction needs many more separate AFCI-protected circuits than older code required. A typical bedroom may need two circuits (one for general receptacles, one for adjacent closet/hallway coverage). A modern kitchen may need 4 to 6 separate AFCI-protected circuits (two countertop circuits, refrigerator, dishwasher, microwave, general lighting). A finished basement may need multiple circuits with AFCI protection.

Under the traditional approach using standard 12/2 Romex, each separate circuit requires its own cable pull from the electrical panel to the destination, creating significant labor cost for the multi-circuit rough-in. Pulling four separate cables for a multi-circuit bedroom involves four separate stud-bay drilling operations, four separate cable runs through the framing, and four separate panel terminations.

The Southwire 12/2/2 Romex collapses two cable pulls into one. For a multi-circuit room needing two separate AFCI-protected circuits, the contractor pulls a single 12/2/2 cable instead of two 12/2 cables. The drilling, routing, and pulling labor is approximately half what it would otherwise be. For a typical multi-room new construction project with many multi-circuit rooms, this labor savings adds up to meaningful project economics.

Common Applications for the Romex Extra Circuit

The Southwire 12/2/2 Romex serves specific new construction applications where multiple AFCI-protected circuits are required in the same general area of the home. The most common applications include:

• Bedroom multi-circuit rough-ins: Running one general-receptacle circuit and one adjacent-area circuit (closet, hallway, additional outlets) from the panel to the bedroom area in a single cable pull.
• Living area multi-circuit rough-ins: Living rooms, family rooms, and similar large gathering spaces that typically need multiple circuits for receptacles, lighting, and entertainment equipment.
• Kitchen wall receptacle circuits: Some kitchen layouts use two adjacent 20-amp small-appliance circuits along the same wall, which the 12/2/2 can serve with a single cable run.
• Home office multi-circuit setups: Modern home offices often need multiple circuits (workstation receptacles, equipment receptacles, additional outlets) that can share a cable path from the panel.
• Basement finishing with multiple circuits: Finished basement areas with multiple separate circuit requirements served from a single basement panel feed.
• Bonus room or family room renovations: Adding multiple circuits to a converted attic, bonus room, or family room renovation.

For single-circuit installations where only one branch circuit is needed at the destination, the standard Southwire 12/2 NM-B Romex SIMpull 250 ft is the appropriate specification at lower cost. The 12/2/2 is specifically for the multi-circuit scenarios where the labor savings justify the cable specification.

Labor Savings vs Running Two Separate 12/2 Cables

The economic case for the Southwire 12/2/2 Romex comes down to labor savings during the rough-in phase of new construction. Understanding the labor math helps confirm when 12/2/2 is the right specification versus running two separate 12/2 cables.

For a typical multi-circuit bedroom rough-in covering 60 to 80 feet of cable run distance, here is the labor comparison:

Approach A – Two separate 12/2 cables: Drill two separate sets of holes through studs and joists (or drill larger holes that accommodate both cables in parallel). Pull two cables sequentially through the rough-in framing. Strip and terminate two cables at the panel. Strip and terminate two cables at each destination junction box. Total labor: approximately 2x the single-cable labor.

Approach B – One 12/2/2 Romex Extra Circuit: Drill one set of holes through studs and joists. Pull one cable through the rough-in framing. Strip and terminate one cable jacket at the panel (separating the four conductors into the two circuits at the panel). Strip and terminate one cable jacket at the destination junction boxes. Total labor: approximately 1.2x to 1.4x the single-cable labor.

The labor saving with the 12/2/2 approach is roughly 30 to 40 percent compared to running two separate cables. For a typical new construction single-family home with multiple multi-circuit rooms (say 6 to 10 multi-circuit applications throughout the home), the cumulative labor saving can be several hours of skilled electrician time, which translates to meaningful project economics.

The trade-off is the higher per-foot cost of the 12/2/2 cable compared to equivalent length of standard 12/2. At $299.99 for 250 feet ($1.20 per foot) versus approximately $0.80 per foot for standard 12/2, the 12/2/2 is meaningfully more expensive per foot. The labor savings need to outweigh the material cost premium for the 12/2/2 specification to be economically justified — which it generally does for projects with substantial multi-circuit AFCI rough-in work.

SIMpull Jacket Technology

The Southwire 12/2/2 Romex uses Southwire’s proprietary SIMpull jacket technology, which delivers the same easy-pull characteristics across the entire Romex SIMpull cable family. SIMpull is more than a marketing name; it refers to specific surface treatment of the cable jacket that reduces pulling friction during installation.

The SIMpull jacket reduces pulling friction by approximately 50 percent compared to traditional Romex jackets. For the 12/2/2 cable specifically, this matters meaningfully because the slightly larger cable diameter (compared to standard 12/2) could otherwise increase pulling resistance. The SIMpull treatment maintains the easy-pull performance even in the larger cable format.

Practical benefits of SIMpull during 12/2/2 installation:

• Faster long pulls: Cable feeds through bored stud holes and around corners with less effort, speeding the rough-in pace.
• Reduced crew fatigue: On long pulls or high-resistance routings, the lower pulling force reduces physical strain on the crew.
• Less cable damage: Lower pulling force reduces the risk of jacket damage or conductor stretching during difficult pulls.
• Consistency across cable family: Electricians who have used standard Southwire SIMpull NM-B Romex know what to expect from the 12/2/2 cable; no surprises from a different brand or jacket technology.

No Handle-Tied Breakers Required (Critical Difference from MWBC)

One of the most important code distinctions between the Southwire 12/2/2 Romex and 12/3 multi-wire branch circuits is the breaker handle-tie requirement. Understanding this difference helps you specify the right panel hardware for your installation.

For multi-wire branch circuits (12/3 used as MWBC), NEC Article 210.4(B) requires that all branch circuit ungrounded conductors be disconnected simultaneously, which is accomplished using handle-tied breakers or a two-pole breaker. This requirement exists because the two hot conductors share a single neutral, and disconnecting only one hot leaves the neutral carrying potentially unbalanced current that could be hazardous during service or troubleshooting work.

For the Southwire 12/2/2 Romex, the two circuits each have their own dedicated neutral, so the handle-tie requirement does NOT apply. The two circuits can be served by two separate independent breakers in the panel, each disconnecting independently. This simplifies the panel installation and allows independent operation of the two circuits — useful when one circuit needs to be serviced or de-energized without affecting the other.

However, the two circuits in a 12/2/2 still need to be on the SAME multi-wire branch circuit hardware configuration is genuinely simpler than MWBC. The two circuits each go to their own AFCI breaker (typically two single-pole AFCI breakers, occupying two adjacent or non-adjacent slots in the panel), with no handle-tie hardware required.

For the AFCI breaker selection, each circuit served by the Southwire 12/2/2 Romex requires its own AFCI-protected breaker per NEC Article 210.12 if the circuit serves AFCI-required spaces. This is two AFCI breakers per 12/2/2 cable, which is a real material cost consideration to include in project budgeting.

Southwire 12/2/2 Romex Specifications

Southwire 12/2/2 Romex FAQs

Who the Southwire 12/2/2 Romex Is Built For

The Southwire 12/2/2 Romex serves a specific buyer profile: electrical contractors handling residential new construction projects with substantial multi-circuit AFCI rough-in work. This is a specialty product for a specialty application, not a general-purpose residential cable.

The primary buyer is the new construction electrical contractor running multi-circuit rough-ins in single-family homes, townhomes, condominiums, or multi-family residential projects. For these contractors, the Southwire 12/2/2 Romex delivers meaningful labor savings on the rough-in phase, with multiple multi-circuit rooms per home benefiting from the single-cable-pull approach. A typical new construction single-family home with 6 to 10 multi-circuit applications might save several hours of skilled labor across the rough-in phase.

The secondary buyer is the major remodel contractor handling significant whole-room or multi-room renovations where current AFCI code requires upgrading the electrical system. For these projects, the Southwire 12/2/2 Romex serves the same labor-saving function during the renovation rough-in phase.

The tertiary buyer is the experienced DIY homeowner doing major personal projects (basement finishing, addition construction, garage workshop conversion) where multiple AFCI-protected circuits need to be installed in the same general area. For these buyers, understanding the 12/2/2 specification and panel hardware requirements before purchase is important; this is not a general-purpose cable for casual DIY work. Browse the broader IB Lighting electrical wire collection for related products and supporting supplies.

Southwire 12/2/2 vs Two Separate 12/2 Cables: When the Specialty Cable Wins

The economic decision between the Southwire 12/2/2 Romex and running two separate Southwire 12/2 NM-B Romex cables comes down to project scale and labor cost. Understanding when each approach is more cost-effective helps you specify the right cable for your specific project.

The Southwire 12/2/2 Romex wins when: the project has multiple multi-circuit rough-ins (typical new construction single-family home), the contractor’s labor cost is meaningful relative to material cost, the rough-in path between panel and destination is long enough that two separate cable pulls would consume significant time, or the project specifically requires multiple AFCI-protected circuits in the same general area of the home. For these scenarios, the 30 to 40 percent labor saving on the rough-in phase outweighs the higher material cost per foot.

The two separate 12/2 cables approach wins when: the project has only one or two multi-circuit applications (where the labor saving on the single cable doesn’t justify the specialty cable purchase), the rough-in path is short (minimizing the labor difference), the two circuits at the destination need to terminate in physically separate locations far enough apart that one cable cannot reasonably serve both, or the project budget specifically constrains material costs more than labor costs.

For DIY homeowners, the calculation is typically different from contractor economics. DIY homeowners often value their own time less explicitly, which can shift the economics toward two separate 12/2 cables. However, for DIY projects with multiple multi-circuit applications, the simplified single-cable rough-in of 12/2/2 may still be appealing for the project workflow improvement even if the material cost is higher.

Installation Best Practices for the Southwire 12/2/2 Romex

Installing the Southwire 12/2/2 Romex follows the same general practices as standard NM-B Romex installation, with several considerations specific to the multi-conductor nature of the cable. Most installation challenges are handled through proper planning at the panel and destination box level.

Plan panel hardware in advance: Each 12/2/2 cable terminates at two separate AFCI breakers in the panel, plus one shared connection to the equipment ground bar. Verify panel capacity for the additional AFCI breakers before committing to the 12/2/2 specification. Each AFCI breaker occupies a single slot in the panel.

Plan destination box configuration: A 12/2/2 cable terminating at a single electrical box brings both circuits to that location, increasing box fill calculations per NEC Article 314. Verify box capacity for the additional conductor count. For installations where the two circuits terminate in physically separate boxes, each box only contains its circuit’s conductors, simplifying the box fill.

Drilling and routing: Drill stud and joist holes sized for the 12/2/2 cable diameter, which is slightly larger than standard 12/2. Plan routing carefully to ensure adequate clearance through the framing. The SIMpull jacket reduces pulling friction, but planning the route still matters for installation efficiency.

Identify circuits at termination: The black hot and white neutral comprise Circuit 1. The red hot and white-with-red-stripe neutral comprise Circuit 2. Label both circuits clearly at the panel and at the destination boxes to prevent confusion during termination, future troubleshooting, or future modifications.

Maintain bend radius: The minimum bend radius for NM-B cable is 5 times the cable diameter. The 12/2/2 has a slightly larger diameter than standard 12/2, so plan bend radii accordingly. Sharp bends can damage the conductor insulation and create future failure points.

Strip and prepare carefully: When stripping the jacket at termination points, take extra care because the four insulated conductors are tightly packed against each other inside the jacket. Cut the outer jacket to expose 8 to 12 inches of conductor, then strip individual conductor insulation as needed for termination. The four insulated conductors plus the bare ground require careful organization at each termination point.

Termination at Panels and Devices

Terminating the Southwire 12/2/2 Romex at panels and destination devices requires understanding how the two circuits separate from the single cable. The process is straightforward but differs from standard 12/2 termination in important ways.

At the electrical panel, the 12/2/2 cable enters through a single cable clamp or knockout. Once inside the panel, the four insulated conductors and the bare ground are separated for individual terminations:

• Black conductor: Lands on the load terminal of Circuit 1’s AFCI breaker.
• White conductor: Lands on the neutral bus for Circuit 1’s return.
• Red conductor: Lands on the load terminal of Circuit 2’s AFCI breaker.
• White-with-red-stripe conductor: Lands on the neutral bus for Circuit 2’s return (visually distinct from Circuit 1’s neutral via the red stripe).
• Bare copper ground: Lands on the equipment ground bus (shared by both circuits).

At each destination box where one of the circuits terminates: bring the cable into the box through the appropriate clamp, strip 8 to 12 inches of outer jacket, separate the conductors, terminate the conductors for that specific circuit, and pass the remaining conductors through to the next box (or coil neatly inside the same box if both circuits terminate at the same location).

For installations where the two circuits terminate at physically separate destinations, the 12/2/2 cable typically routes to a junction box where the cable splits: at the junction, both circuits’ conductors are split between two cables that continue to the separate destinations. This is a common pattern when the 12/2/2 carries two circuits from the panel to a general home area, then the circuits split at a centralized junction to serve different rooms or device clusters.

Browse the complete IB Lighting electrical wire and cable collection, compare with the standard single-circuit Southwire 12/2 NM-B Romex SIMpull 250 ft, compare with the three-conductor Southwire 12/3 NM-B Romex SIMpull 250 ft for three-way switch and MWBC applications, browse the smaller-gauge Southwire 14/3 NM-B Romex SIMpull 250 ft for 15-amp three-conductor applications, explore other Southwire products, or visit our customer FAQ hub. Manufacturer technical sheets are available at the official Southwire website.