You have just installed a new submersible well pump, or perhaps you are replacing old wiring that has seen better days. The cable that connects your pump to the power source is not just any extension cord. It must handle constant submersion, resist corrosion, and deliver reliable power over long distances. This is where submersible pump wire 12/2 comes in. In this guide, we evaluate four top-quality options from Kalas, a trusted American manufacturer, so you can choose the right length and configuration for your well system. Whether you need a standard pre-cut length or a custom cut, these wires are built for 600-volt service and are ideal for 2-wire well pumps without a control box.
Before diving into the products, it helps to understand your well pump setup. If you are unsure about the type of pump you need, check out our guide on what pump is right for your well. It explains the differences between 2-wire and 3-wire systems, which directly affects the cable you purchase.
Pros
- UL Listed to UL83 Type THW for safety and code compliance.
- Solid copper conductors deliver superior conductivity and durability.
- Twisted wires are flexible and easy to handle during installation.
- Rated for 600V and extreme temperature ranges.
- Positive customer feedback with a 4.7-star average rating.
Cons
- No outer jacket means the cable is more susceptible to cuts and abrasion during installation.
- Fixed 100-foot length may not fit non-standard well depths, requiring splicing or a different product.
- Designed only for 2-wire pump systems without a control box, limiting compatibility with 3-wire setups.
The Kalas 100 ft 12/2 w/G Submersible Well Pump Wire Cable is a pre-cut solution for powering 2-wire well pump systems. With 12-gauge solid copper conductors and a dedicated ground, this cable is built for deep well installations where reliability matters most.
Rated for 600 volts and operating temperatures from -40°C to 75°C, the wire handles tough underground conditions. The individually insulated, twisted conductors have no outer jacket, which makes them flexible and easier to pull through conduit or well casings. The PVC insulation is UL Listed per UL83 Type THW, giving you confidence in its safety and performance.
Installation is straightforward for a 2-wire setup that does not require a control box. The color-coded red, black, and green wires simplify connections, and the 100-foot length covers many standard well depths. Users give it high marks for durability and ease of use, reflecting a solid 4.7-star average rating.
One consideration is that the lack of a protective outer jacket means you should handle the cable carefully during installation to avoid nicks or abrasions. Also, if your well pump requires a third wire or a control box, this cable is not the right match.
Overall, the Kalas 12/2 submersible well pump wire is a dependable choice for well owners seeking a quality, American-made cable. For those with a compatible 2-wire pump, it delivers excellent value and long-term performance.
Brand: Kalas
Length: 100 feet
Gauge: 12 AWG
Conductor: Solid copper
Wires: 2 conductors plus ground
Insulation: PVC, UL Listed Type THW
Voltage Rating: 600 volts
Temperature Range: -40°C to 75°C
Made in: USA
Pros
- High quality solid copper construction for superior conductivity
- UL listed for safety and compliance with electrical codes
- Made in USA with reliable manufacturing standards
- Pre-cut 200 ft length convenient for typical well pump installations
- Good value compared to big box store pricing, as noted by customers
Cons
- Some customers reported receiving slightly shorter lengths than ordered, so verify upon delivery
- No outer jacket means the wire must be handled with care to avoid kinking or damage during installation
- Designed only for 2-wire well pump systems without a control box, not for 3-wire setups
The Kalas 200 ft 12/2 w/G Submersible Well Pump Wire Cable is a purpose-built solution for homeowners and contractors installing 2-wire well pumps. This UL-listed cable is designed to deliver power safely underground, with solid copper conductors that minimize voltage drop over long runs. It is specifically intended for systems that do not use a separate control box, making it a straightforward choice for many residential deep well setups.
What sets this wire apart is its solid copper construction and twisted design. The individual conductors are insulated with durable PVC and twisted together to reduce electrical interference while simplifying pulling through conduit or direct burial. The 600V rating and wide operating temperature range (-40C to 75C) ensure reliable performance in extreme conditions, from freezing winters to hot summers. Customers consistently praise the build quality and value, noting it as a cost-effective alternative to big box store options.
The cable is made in the USA and comes pre-cut at 200 feet, which eliminates waste and saves time on measuring. The insulation thickness of 0.045 inches provides robust protection against moisture and abrasion. However, unlike some submersible cables, this product does not have an outer jacket. This means the three twisted wires are exposed, so careful handling is needed to prevent damage during installation. The included green ground wire adds an extra layer of safety for submersible applications.
One potential drawback reported by a small number of buyers is that the delivered length was slightly shorter than advertised. While most customers received the correct length, it is wise to double-check upon receipt, especially if your well depth is critical. Additionally, this wire is not suitable for 3-wire pump systems that require a control box, so verify your pump type before purchasing.
Overall, the Kalas 200 ft 12/2 Submersible Well Pump Wire Cable is a reliable, high-quality choice for DIYers and professionals alike. Its solid copper conductors, UL listing, and extreme temperature rating make it a trustworthy component for any 2-wire well pump installation. If you need a pre-cut, no-fuss cable that delivers performance and value, this is an excellent option.
Pros
- UL Listed for safety and code compliance
- Solid copper wire for superior conductivity
- Pre-cut 500 ft length for a complete installation
- Flexible twisted design is easy to handle and pull
- Rated for extreme temperatures and moisture
Cons
- No outer jacket, so wires require careful handling to avoid abrasion during installation
- Not for use with 3-wire pump systems that require a control box
- Only available in 12 AWG, may not suit larger pumps requiring 10 AWG or thicker wire
This Kalas 500 ft 12/2 submersible well pump wire is a purpose-built cable for 2-wire well pump systems that operate without a control box. It is an excellent choice for homeowners, well drillers, and contractors who need a long, reliable power run from the surface to a deep submersible pump.
The cable features three twisted conductors: red, black, and green ground, all made from 12-gauge solid copper. With a 600V rating and UL Listed certification per UL83 Type THW, it delivers dependable performance in demanding underground and submerged environments.
Each conductor is insulated with thick PVC rated for temperatures from -40°C to 75°C. The twisted, jacketless design allows for easy separation and termination, but it also means installers should protect the wires from sharp edges during installation.
Since this wire has no outer jacket, it is less resistant to physical damage than some jacketed cables. Additionally, it is specifically intended for 2-wire pump systems, so those with a 3-wire setup that uses a control box will need a different cable configuration.
Overall, the Kalas 12/2 submersible well pump wire stands out for its solid copper construction, generous 500 ft length, and robust insulation. For a straightforward, code-compliant wiring solution for a 2-wire well pump, this cable delivers excellent value and peace of mind.
Brand: Kalas
Length: 500 ft
Gauge: 12 AWG
Conductors: 2 wires plus ground (red, black, green)
Voltage Rating: 600 volts
Material: Solid copper
Insulation: PVC
Temperature Range: -40°C to 75°C
UL Listing: UL83 Type THW
Wire Diameter: 0.08 inches
Number of Cable Strands: 3
Part Number: 440013.5
Made In: USA
Pros
- High-quality stranded copper for reliable current transmission.
- Custom cut lengths mean no excess wire and lower project cost.
- THW rated for water submersion and high heat environments.
- Fast shipping as noted in multiple positive reviews.
- Flat shape makes pulling through conduit or tight spaces easier.
Cons
- Only available in 12-2 gauge; other gauges or configurations may not be offered.
- Does not include connectors or terminals, which must be purchased separately.
- Yellow color may not be preferred for all installations, though it aids visibility.
The KALAS 12-2 Flat Yellow Submersible Pump Cable is a premium choice for anyone installing or replacing a submersible well pump, outdoor lighting, or any 600-volt rated circuit. This THW stranded copper wire is designed to withstand moisture, heat, and the rigors of underground or underwater use. With a solid 4.6 out of 5 stars from verified buyers, it has earned a reputation for reliability and performance.
Standout features include the ability to order custom cut lengths in 10-foot increments, which means you only pay for what you need and avoid wasteful leftover coils. The 600-volt rating gives you peace of mind for higher-power applications. Stranded copper offers excellent conductivity and flexibility, making it easier to route around obstacles compared to solid core wire. The PVC jacket is THW rated, meaning it can handle wet conditions and elevated temperatures.
Build quality is first-rate: buyers describe the wire as high quality, easy to work with, and delivered on time. Several reviews highlight same-day shipping and quick arrival, which is a major plus for urgent projects. The flat yellow design helps prevent tangling and makes wire identification simple on the job site.
Potential drawbacks are minor: the wire comes bare without any connectors or terminals, and it is only available in the 12-2 (12 AWG, two conductor) configuration. If you need a different gauge or more conductors, you will need to look elsewhere. Also, while yellow is highly visible, some may prefer a different color for aesthetic reasons.
Overall, the KALAS 12-2 submersible pump cable delivers exactly what it promises: high quality, custom lengths, and robust construction. It is an excellent choice for well pumps, water features, and other outdoor electrical projects. Backed by strong customer reviews, this wire offers great value for both DIYers and professionals.
Buying Guide: What to Look for in Submersible Pump Wire 12/2
Cable Length: Measure Twice, Buy Once
The distance from your well head to the pump motor and then to your power source determines the length you need. Pre-cut lengths like 100 ft and 200 ft are convenient for standard installations. For deeper wells, the 500 ft option gives you plenty of slack. If your distance is unusual, the cut-to-length option from Kalas lets you order exactly what you need in 10-foot increments. Always add a few extra feet for service loops and connections.
Solid vs. Stranded Conductors
The pre-cut Kalas wires use solid copper conductors, which are excellent for fixed installations because they resist corrosion and offer low resistance over long runs. The cut-to-length option features stranded copper, which is more flexible and easier to pull through conduit or tight spaces. For most submersible pump installations, solid wire is preferred for its durability, but stranded wire can be a lifesaver when routing is tricky.
Insulation and Voltage Rating
All four products are rated for 600 volts, which is the standard for residential well pumps. The insulation is THW type for the cut-to-length cable and a tough PVC coating on the pre-cut wires. This insulation resists water, oil, and sunlight, making it safe for direct burial or continuous submersion. Never use ordinary Romex or indoor wiring for submersible applications.
Wire Configuration: 2 Wires Plus Ground
These cables include two insulated conductors (black and red) plus a bare or green ground wire. This 12/2 w/G configuration is specifically for 2-wire well pumps that do not require a separate control box. If you have a 3-wire pump, you would need a different cable. For a deeper understanding of well pump wiring, browse our Replacement & Parts category.
Final Thoughts
After reviewing these Kalas offerings, we recommend the 200 ft 12/2 w/G Submersible Well Pump Wire Cable for most standard residential wells, as it strikes a balance between length and affordability. For shallower wells or shorter runs, the 100 ft 12/2 w/G Submersible Well Pump Wire Cable is a cost-effective choice that still delivers the same quality. If your installation requires a custom length, the cut-to-10-foot-increments option offers unmatched flexibility. All of these wires are made in the USA and carry a solid reputation for reliability. Pair your cable with a quality pump kit from our Well Pump Kit for Home guide to complete your setup.
Frequently Asked Questions
What size wire do I need for a submersible pump?
For most residential submersible pumps, 12 gauge wire (12/2 or 12/3) is sufficient for runs up to about 200 feet. For longer distances or higher horsepower pumps, you may need 10 gauge. Always check your pump manufacturer’s specifications and local electrical codes. Our well pump kit buying guide can help you match wire gauge to pump size.
Can I use 12/2 Romex for a submersible pump?
No. Romex is not rated for wet or underground locations. Submersible pump wire has a special insulation that withstands constant moisture and pressure. Using Romex can lead to short circuits, corrosion, and pump failure. Always use a cable specifically labeled as submersible pump wire, like the Kalas options reviewed here.
What is the difference between 12/2 and 12/3 submersible pump wire?
12/2 wire has two insulated conductors plus a ground, and it is used for 2-wire pumps that have the starting components built into the motor. 12/3 wire has three insulated conductors plus a ground, and it is required for 3-wire pumps that use a separate control box above ground. Check your pump’s wiring diagram before purchasing. If you are considering a pump upgrade, our soft start well pump guide explains how these systems work.
How long does submersible pump wire last?
High-quality submersible pump wire like Kalas can last 20 years or more when properly installed and protected from physical damage. The PVC insulation resists degradation from water and soil chemicals. However, lightning strikes or power surges can damage the wire insulation over time. Regular inspection of the wire at the well head is recommended.
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