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ROMEX

ROMEX is a brand of electrical building wire and cable manufactured by Southwire Company, a wire and cable producer based in Carrollton, Georgia, USA. The ROMEX name is associated with nonmetallic-sheathed cable for interior wiring and with UF-B underground feeder cable for direct-burial and wet-location circuits. Southwire has produced ROMEX-branded cable since the mid-20th century, and the product line is specified in residential, commercial, and light-industrial electrical work where a factory-assembled conductor bundle with integral grounding is required. The UF-B construction consists of insulated conductors, a bare copper equipment grounding conductor, and a sunlight-resistant, moisture-resistant, flame-retardant PVC jacket that permits direct burial without a conduit raceway. Conductors are solid or stranded copper, depending on AWG size, and the jacket is gray for identification. Available configurations include 14 AWG through 8 AWG, with two or three insulated conductors plus a grounding conductor sized to the circuit. Voltage rating is 600 V, and the cable is listed to UL 493 for underground feeder applications; some constructions also carry UL 83 listing for thermoplastic-insulated wire. Temperature rating is 60°C for UF-B in wet locations and 90°C for dry locations, per the standard. These ratings make the cable suitable for branch circuits, feeder runs, outdoor lighting, pump and well circuits, and other underground or damp installations. 3G Electric supplies ROMEX UF-B underground feeder cable in multiple SKUs, covering 14 AWG, 12 AWG, 10 AWG, and 8 AWG, with two- and three-conductor constructions and coil lengths including 25 ft and 250 ft. Each SKU is identified by AWG, conductor count, conductor colors, grounding conductor size, overall length, and jacket color, so procurement and engineering teams can match the cable to the circuit schedule without ambiguity. 3G Electric supports the line with global logistics, documentation for the listed standards, and quotation on request. The catalog entries reflect the manufacturer's published specifications; buyers should confirm ampacity, voltage drop, burial depth, and overcurrent protection against the applicable electrical code for the installation.

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About ROMEX

ROMEX is a brand of electrical building wire and cable manufactured by Southwire Company, a wire and cable producer based in Carrollton, Georgia, USA. The ROMEX name is associated with nonmetallic-sheathed cable for interior wiring and with UF-B underground feeder cable for direct-burial and wet-location circuits. Southwire has produced ROMEX-branded cable since the mid-20th century, and the product line is specified in residential, commercial, and light-industrial electrical work where a factory-assembled conductor bundle with integral grounding is required. The UF-B construction consists of insulated conductors, a bare copper equipment grounding conductor, and a sunlight-resistant, moisture-resistant, flame-retardant PVC jacket that permits direct burial without a conduit raceway. Conductors are solid or stranded copper, depending on AWG size, and the jacket is gray for identification. Available configurations include 14 AWG through 8 AWG, with two or three insulated conductors plus a grounding conductor sized to the circuit. Voltage rating is 600 V, and the cable is listed to UL 493 for underground feeder applications; some constructions also carry UL 83 listing for thermoplastic-insulated wire. Temperature rating is 60°C for UF-B in wet locations and 90°C for dry locations, per the standard. These ratings make the cable suitable for branch circuits, feeder runs, outdoor lighting, pump and well circuits, and other underground or damp installations. 3G Electric supplies ROMEX UF-B underground feeder cable in multiple SKUs, covering 14 AWG, 12 AWG, 10 AWG, and 8 AWG, with two- and three-conductor constructions and coil lengths including 25 ft and 250 ft. Each SKU is identified by AWG, conductor count, conductor colors, grounding conductor size, overall length, and jacket color, so procurement and engineering teams can match the cable to the circuit schedule without ambiguity. 3G Electric supports the line with global logistics, documentation for the listed standards, and quotation on request. The catalog entries reflect the manufacturer's published specifications; buyers should confirm ampacity, voltage drop, burial depth, and overcurrent protection against the applicable electrical code for the installation.

Common Applications

  • Residential branch circuits — ROMEX UF-B 14 AWG 2-conductor with 14 AWG ground for outdoor receptacles and lighting
  • Detached garage and outbuilding feeders — ROMEX UF-B 8 AWG 3-conductor with 10 AWG ground for subpanel supply
  • Well pump and water system circuits — ROMEX UF-B 12 AWG 2-conductor with 12 AWG ground for buried pump runs
  • Landscape and post lighting — ROMEX UF-B 10 AWG 2-conductor with 10 AWG ground for direct-burial lighting circuits
  • Agricultural and yard equipment supply — ROMEX UF-B 10 AWG 3-conductor with 10 AWG ground for outdoor equipment feeders
  • Commercial exterior circuits — ROMEX UF-B 8 AWG 3-conductor with 10 AWG ground for buried feeder runs to remote loads

Frequently asked questions

Common questions about ROMEX from 3G Electric.

What is ROMEX UF-B underground feeder cable listed to?

ROMEX UF-B cable is listed to UL 493, the standard for underground feeder and branch-circuit cable. Some constructions in the line also carry UL 83 listing for thermoplastic-insulated wire. The cable is rated 600 V and is intended for direct burial, wet locations, and outdoor circuits where a raceway is not used. The gray PVC jacket is sunlight-resistant, moisture-resistant, and flame-retardant. Temperature ratings are 60°C in wet locations and 90°C in dry locations. Buyers should verify the specific SKU's listing and temperature rating against the project specification and the applicable electrical code before installation.

What conductor sizes and configurations are available in the ROMEX UF-B line from 3G Electric?

3G Electric carries ROMEX UF-B in 14 AWG, 12 AWG, 10 AWG, and 8 AWG. Configurations include two insulated conductors (black and white) and three insulated conductors (black, red, and white), each with a bare copper equipment grounding conductor sized to the circuit. Coil lengths in the current catalog include 25 ft and 250 ft. Jacket color is gray. Each SKU is defined by AWG, conductor count, conductor colors, grounding conductor size, and overall length, so the correct cable can be selected directly from the circuit schedule.

Can ROMEX UF-B cable be installed without conduit?

ROMEX UF-B is designed for direct burial and does not require a conduit raceway for that application. The jacket is rated for wet locations and sunlight exposure, so it can also be run outdoors where supported. Installation must follow the applicable electrical code, including minimum burial depth, protection where the cable emerges from the ground, and support intervals. Where physical damage is likely, or where local code requires it, a raceway or other protection may still be necessary. The cable's UL 493 listing covers underground feeder and branch-circuit use; the installer is responsible for confirming that the specific routing and depth meet the code in force at the site.

What is the difference between ROMEX UF-B and standard NM-B cable?

ROMEX UF-B is an underground feeder cable listed to UL 493, with a jacket rated for direct burial, wet locations, and sunlight exposure. Standard NM-B cable is intended for dry, interior locations and is not rated for burial or wet exposure. UF-B uses a solid PVC jacket over the conductor assembly, while NM-B uses a paper-and-plastic sheath within an outer jacket. Both include a bare copper equipment grounding conductor. For outdoor circuits, feeder runs to detached structures, well pumps, and similar applications, UF-B is the appropriate construction. NM-B should not be substituted in wet or buried locations.

How does 3G Electric support ROMEX UF-B orders?

3G Electric lists ROMEX UF-B SKUs with the manufacturer's published specifications, including AWG, conductor count, conductor colors, grounding conductor size, overall length, jacket color, and standards. The catalog covers multiple sizes and coil lengths so buyers can match the cable to the circuit schedule. 3G Electric provides global logistics and quotation on request. For projects requiring documentation, the listed standards and SKU-level specifications are available to support submittals. Buyers should confirm ampacity, voltage drop, and code compliance for their specific installation.

Does 3G Electric supply ROMEX products?

Yes — 3G Electric (S) Pte. Ltd. supplies ROMEX products. We stock the ROMEX catalog and supply genuine factory-original products with full manufacturer warranty and technical support.