Kimbluth 12 Gauge 12/3 Marine Triplex Wire, 12 AWG, 30ft — Tinned Copper, PVC Jacket

Kimbluth 12 Gauge 12/3 marine triplex wire is a 30-foot, tinned-copper boat cable built for saltwater exposure, high temperatures, and reliable onboard power runs.

This 12/3 marine-grade cable combines corrosion-resistant tinned copper conductors with robust PVC insulation to serve lighting, battery, and general electrical needs on boats, RVs, and outdoor installations. Engineered to meet common marine standards, it balances flexibility for installation with durability against salt, heat, and abrasion so your circuits stay dependable in wet, moving, or UV-exposed settings.

How does this wire resist corrosion and interference?

Each conductor is tinned to slow oxidation and reduce galvanic corrosion when exposed to salt air or wet conditions. The tinned surface also improves electrical stability and helps lower the risk of signal or circuit interference from nearby wiring or equipment.

• Tinned copper conductors for longer life in marine environments
• Improved conductivity and reduced oxidation versus bare copper
• Better immunity to stray electrical noise for stable circuits

What protection does the insulation provide?

The cable uses a specially formulated PVC jacket that protects conductors from saltwater, fuels, battery acid, sunlight, and mechanical wear. It also remains flexible for routing through tight channels while resisting cracking at elevated temperatures and under frequent movement.

• Custom PVC resists saltwater, gasoline, and battery acid
• High abrasion resistance for chafe-prone installations
• Maintains flexibility for easier runs through compartments and conduits

Will this cable meet my boat electrical requirements?

Kimbluth 12/3 triplex is built to common marine wiring specifications for boat installations and is suitable for 12 gauge circuits up to standard marine voltage ratings. Its construction fits lighting, accessory, battery, and general-purpose wiring on vessels as well as in solar, RV, and fixed outdoor systems.

• Rated to standard marine wire voltages (up to 600V operational rating)
• Designed for dry operation up to high temperatures and wet environments at reduced ratings
• Compliant with typical UL and SAE/ABYC-style expectations for boat cable use

How do I use and install the 12/3 triplex on my boat?

Route the cable keeping bend radii gentle and secure with appropriate clamps to prevent chafe. Terminate with marine-rated connectors or soldered/tinned terminations, and protect exposed terminations with heat-shrink or marine-grade boots to maintain corrosion resistance.

• Support cable at intervals and avoid sharp bends or pinch points
• Use tinned lugs or properly sealed connectors for lasting connections
• Apply heat-shrink or sealant at terminations to keep moisture out

Who is this for: This 30-foot Kimbluth 12/3 marine cable is aimed at boat owners, DIY marine electricians, RV and solar installers, and anyone needing a durable, flexible 12-gauge triplex for outdoor or corrosive settings. Choose it when you want tinned conductors, saltwater-resistant insulation, and a ready-to-run length for lighting, battery circuits, or auxiliary power where marine-grade reliability matters.

Key product attributes:

• 30 ft length of 12 AWG, 3-conductor triplex configuration
• Tinned copper for improved corrosion resistance and conductivity
• Special PVC jacket resists saltwater, gasoline, battery acid, abrasion, and UV
• Operational voltage rating up to 600V; elevated dry and wet temperature tolerances
• Suitable for boat lighting, battery feeds, automotive, RV, solar and outdoor wiring