Grand General – 3-Conductor Parallel Primary Wire (Sold by the Foot)

Build clean, reliable trailer and marker-light circuits with Grand General Parallel Primary 3-Wire. This bonded “zip” style cable runs three insulated, stranded copper conductors in parallel for fast routing and easy ID/termination—perfect for semi-trucks, utility trailers, RV, marine and upfit jobs.

How pricing & cutting works (READ THIS)

• Sold by the foot – set Quantity = total feet you want (e.g., Qty 20 = 20 feet).
• We ship one continuous length per line item whenever possible. If you need multiple separate pieces (e.g., 10ft + 10ft), add separate line items or tell us in Order Notes.
• By-the-foot lengths are coiled (no spool). Whole spools available only if you purchase full-roll footage.

Choose your gauge (variants)

• 18 AWG – SKU 55310 (Grand General)
  
• 16 AWG – SKU 55311
  
• 14 AWG – SKU 55317
  

What it is

• 3 conductors in parallel (bonded) – individually insulated copper wires held side-by-side for neat runs; easily peel/split apart at the ends for termination. (Parallel bonded trailer/primary wire description)
• Stranded copper with PVC insulation; general-purpose primary wiring used widely for trailer lights and low-voltage DC circuits.

Typical uses

• Trailer running/marker/turn/brake light circuits
• Aux lighting, utility bodies, RV and marine low-voltage wiring
• Clean 3-wire harness runs where bonding keeps conductors together

Key specs

• Construction: 3 parallel, bonded stranded copper conductors with PVC insulation (primary wire).
• Manufacturer: Grand General (Parallel Primary 3-Wire series).
• Original packaging options: 25 ft / 100 ft / 500 ft rolls (we cut per-foot from roll for you).
• Prop 65: This product can expose you to chemicals including DEHP and lead/lead compounds. See www.P65Warnings.ca.gov.
• Warranty: 6-month limited (manufacturer).

Color ID

Each conductor is individually insulated for identification. Note: exact conductor colors may vary by production lot/manufacturer spec. If a specific color set (e.g., brown/yellow/green) is critical for your install, please contact us before ordering and we’ll confirm the current stock.

FAQ

Q: Is this the same as “trailer cable” or “zip cord”?
It’s the bonded/parallel style many techs call “zip,” commonly used for trailer/marker lighting. It’s three independent primary wires bonded together for a tidy run and easy separation at the ends.

Q: What voltage/ratings does it meet?
This style of bonded primary wire is widely used for 12V/24V DC lighting circuits with PVC primary insulation; if you require a specific spec (e.g., SAE J1128 GPT or temperature rating), reach out and we’ll confirm the exact rating on our current Grand General stock before you buy.

Q: Can you ship it on a spool?
By-the-foot orders ship coiled. If you need a spool, purchase a full-roll length (subject to availability).

Q: I need one continuous 150 ft piece—can you do that?
Yes—enter Quantity 150. We cut continuous lengths up to the roll length in stock. Add a note if you need multiple custom cuts.

Pro tips

• Plan your run lengths and add a little extra for service loops and terminations.
• Protect runs with loom/conduit where abrasion is possible and use proper strain reliefs.
• Use quality crimp connectors and heat-shrink for weather-exposed areas.

Local pickup / GEO

Order online or pick up at The New Vernon Truck Wash Chrome Shop (Barstow, California). Our team can help you choose the right gauge and accessories (loom, connectors, heat-shrink) for a clean install.