Ryukiro 12 Gauge AWG 6 color Primary Wire Combo (50 feet Red Black Blue Yellow Green White) Stranded CCA Copper Cable Car Motorcycle Audio Video Dashboard Replacement Automotive Trailer Hook Up Harness Wiring

Why I picked up this wire kit

I’m constantly wiring 12–24 V projects—everything from auxiliary lighting and trailer hookups to benchtop robotics experiments. I wanted a single bundle that gave me enough length, decent flexibility, and clear color-coding so I could keep harnesses organized. The Ryukiro 12‑gauge wire kit checks those boxes on paper: six colors, 50 feet each, stranded copper‑clad aluminum (CCA), and GPT automotive PVC insulation rated −40°F to 195°F with oil and gas resistance. After putting it through several installs, here’s how it actually performs.

What you get

• Six spools: red, black, blue, yellow, green, and white
• 12 AWG equivalent overall size
• Stranded CCA conductors (108 strands × 0.20 mm)
• GPT-grade PVC insulation, oil and gas resistant
• Temperature rating: −40°F to 195°F

The color assortment is the right mix for most automotive and low‑voltage DC work. I used red/black for power and ground, blue/yellow for switched circuits and signals, and kept green/white for accessories and labeling flexibility. Having 50 feet of each color made it easy to run longer continuous lengths without splicing.

Build and materials

The conductor is copper‑clad aluminum. That means an aluminum core with a thin copper outer layer. CCA is lighter and generally more flexible for a given gauge, but it has higher resistance than pure copper. In practical terms, you treat it like a half‑step thinner copper wire for current and voltage drop planning. The strand count (108 x 0.20 mm) delivers a supple feel; the wire routes through tight corners and around trim panels without fighting you.

The GPT insulation is typical for automotive general‑purpose harness work: smooth jacket, decent abrasion resistance, and enough thickness to avoid nicks from plastic edges when you’re fishing through dashboards. It’s not the ultra‑high‑temp cross‑linked stuff (like GXL/SXL), but the 195°F rating covers most cabin and chassis runs.

Flexibility and handling

Routing the Ryukiro wire kit through a vehicle cabin was easy. The cable takes bends cleanly and doesn’t hold a stubborn coil memory from the spool. It strips predictably with standard gauge-matched strippers—no jacket tearing—and the strands stay together without fraying. The CCA core is soft enough that you want to avoid aggressive twisting or over‑crimping; use a quality ratcheting crimper and you’ll get solid terminations.

For soldering, extra flux helps wet the copper cladding quickly. I recommend crimp‑first, solder‑optional for vibration-prone environments, then seal with adhesive lined heat‑shrink. Ferrules are a nice upgrade at terminal blocks; they prevent strand splay and improve clamping on the softer CCA metal.

Electrical performance in real projects

I ran this wire for:

• A 12 V relay‑driven LED work‑light circuit (10–12 A total)
• A 7‑way trailer harness repair (lighting and charge line at modest current)
• A benchtop DC distribution rail for microcontrollers, servos, and sensors

In these scenarios, the wire behaved as expected: no noticeable dimming on normal runs, cool to the touch at typical accessory currents, and stable terminations with crimped, sealed connectors.

Where you should be more deliberate is in higher‑current or longer runs. Because CCA has higher resistance than full copper, voltage drop adds up sooner. For a 12 V system, you want to keep total drop around 3% for critical loads. If you’re pushing 20–30 A to an amplifier, an air compressor, or a long trailer charge line, either shorten your runs, step up one wire size, or switch to pure copper. For most accessory lighting, relay triggers, and medium‑draw circuits, this 12‑gauge CCA is fine.

Insulation, environment, and durability

GPT PVC with oil and gas resistance is appropriate for automotive interiors, chassis rails, and general harnesses that might see the occasional drip of fluids. The −40°F rating is welcome if you’re working in cold climates; the jacket doesn’t get brittle when you unspool it in winter. The 195°F ceiling means it’s fine near cabins and trunks, and in most engine bays as long as you route away from exhaust components and turbo plumbing. If your run must pass close to high‑heat sources, switch to GXL/SXL wire or add extra heat sleeving and standoffs.

For outdoor exposure, PVC isn’t the most UV‑resistant insulation. If this wire will be in direct sunlight—trailer frames, roof racks—protect it inside split loom or conduit, and secure it at reasonable intervals to prevent chafe. The jacket holds up well against edge clips and grommets when properly supported.

Color coding that actually helps

Six distinct colors across 50‑foot spools sounds minor, but it pays off. I could designate red for constant 12 V, yellow for ignition/switched, blue for outputs to relays, green for sensors, white for returns/signal grounds, and black for chassis grounds. It makes your continuity checks easier months later. The jacket doesn’t have printed gauge/standard markings, but the color diversity makes labeling simpler with heat‑shrink markers.

Compatibility with connectors and tools

• Ring and spade terminals: Use 12–10 AWG insulated or non‑insulated terminals with a ratcheting die. The softer CCA benefits from proper compression; cheap crimpers will under‑crimp and pull out.
• Weather‑sealed connectors: Works well with Deutsch DT and Weather Pack once you match the seal size to the jacket OD.
• Terminal blocks and set screws: Add ferrules to avoid strand cold flow and retightening down the road.
• Soldering: Use rosin flux and moderate heat. Don’t wick solder far under insulation to avoid stiff points that can fatigue.

Where it shines

• 12/24 V accessory circuits: lights, relays, switches, sensors
• Trailer lighting repairs and moderate charge/aux lines (short to moderate length)
• Benchtop robotics, R/C, model rail, and drone ground stations
• Replacement harnesses where flexibility and color coding matter

The kit’s value is primarily in convenience: enough length per color to complete real runs, consistent jacket quality, and manageable flexibility for tight routing.

Limitations to know before you buy

• It’s CCA, not pure copper. Plan for slightly more voltage drop and derate your expectations for high‑current runs.
• GPT isn’t the best choice for sustained under‑hood hot zones. If you’re near exhaust manifolds or turbos, use higher‑temp cross‑linked wire or additional heat protection.
• PVC isn’t ideal for long‑term direct sun. Use loom or conduit for outdoor, UV‑exposed runs.

These aren’t deal‑breakers for the intended use, but they’re worth planning around.

Tips for best results

• Fuse to wire capacity, not device rating, and place fuses close to the source.
• Keep return (ground) runs the same gauge as feed for low‑noise systems.
• For 20+ amp loads or long round‑trip distances, step up the gauge or move to copper to keep voltage drop in check.
• Support runs every 12–18 inches in vehicles and protect pass‑throughs with grommets.
• Label both ends. The color variety helps, but end labels save time later.

Alternatives worth considering

• Pure copper automotive wire (GXL/SXL/TXL) if you need higher temperature ratings, better resistance to abrasion, or lower voltage drop.
• Tinned copper marine wire if you’re in high‑corrosion or saltwater environments.
• Heavier gauge CCA for long runs at moderate currents if you prefer to stay with CCA but want headroom.

Bottom line

The Ryukiro 12‑gauge wire kit hits a practical sweet spot for low‑voltage automotive and hobby projects: six useful colors, 50 feet each, flexible stranded construction, and an insulation package that stands up to oils, fuel splashes, and typical cabin/chassis temperatures. In my installs, it routed cleanly, crimped reliably with the right tools, and performed as expected for accessory‑level loads.

Recommendation: I recommend this kit for 12/24 V projects where organization, flexibility, and value matter—LED lighting, relay panels, trailer lighting, and general harness repairs. If your use case involves sustained high current, extended runs, under‑hood heat, or harsh outdoor exposure, choose pure copper in a higher‑temp insulation or bump the gauge. For everything else in the low‑ to medium‑draw category, this kit is a dependable and convenient choice.