10 AWG GXL Tinned Automotive Wire — Per Metre

Q: What does 10 AWG actually mean?
AWG = American Wire Gauge, the standard sizing system for automotive and electrical wire. Lower number = thicker wire = more current capacity. 10 AWG is a thick automotive gauge for dual-battery feeds, DC-DC charger wiring and fuse block distribution. 14 AWG steps down for relays and ignition-level loads, 18 AWG is thin (sensors, LEDs).

Q: What does GXL mean, and how is it different from TXL?
Both are wire construction specs under SAE J1128 using the same cross-linked polyethylene (XLPE) insulation. The difference is wall thickness: GXL uses a general-purpose wall, thicker than TXL's extra-thin wall, which gives it more resistance to abrasion and cuts at the cost of a slightly larger outer diameter. Ours is also tinned-copper for extra corrosion resistance, making it a good pick for chassis runs, engine bays and marine or bilge environments where a thinner wall would wear faster.

Q: What does SAE J1128 actually cover, does it include IP rating or corrosion resistance?
SAE J1128 is the automotive-industry standard for primary wire, everything the wire itself needs to survive under a bonnet. To meet it, the wire is tested and rated for: voltage (rated up to 60V DC, so it covers 12V, 24V, 36V and 48V systems); temperature (−40°C to +125°C without going brittle or softening); chemical resistance (insulation doesn't crack when exposed to petrol, diesel, engine oil, brake fluid, transmission fluid or ethanol); flame retardance; and minimum insulation thickness plus strand construction per gauge. What it does NOT cover: IP ingress rating (that's IEC 60529, a separate spec for enclosures and connectors, a bare wire has no IP rating on its own); salt-spray corrosion (comes from the tinned copper conductor plus the terminals and boots you crimp on, not the J1128 wire spec itself); and UV rating for permanent outdoor exposure. Short version: J1128 covers the wire; you spec sealed connectors and adhesive-lined heat-shrink separately for weatherproof terminations.

Q: Can I use 10 AWG for a full dual-battery setup?
For most DC-DC and dual-battery feeds under 40A on runs up to 3m, yes. Longer runs or higher-draw setups (winches, big inverters, 200A+ loads) need much heavier cable like 2 AWG to 1/0 AWG, not GXL primary wire. Check your DC-DC or inverter's rated current and run length against the size guide above before wiring.

Q: How is this sold, per metre or on a spool?
Sold per metre. Order the quantity you need per colour, no minimum, no fixed spool sizes.

Q: What's the temperature range?
−40°C to +125°C, so it holds up in the engine bay, chassis runs and marine bilges as well as the cabin. Insulation resists oil, fuel and common solvents.

Q: What crimp terminals fit 10 AWG?
Standard 12–10 AWG terminals, usually yellow-coded on insulated terminal ranges. Non-insulated (open barrel) OEM-style terminals or lugs need to be matched to the exact wire cross-section (5.26 mm² for 10 AWG).

Q: Is this bare copper or tinned copper?
Tinned. The strands are electroplated with a thin tin coating over the copper, which stops oxidation from air, moisture and salt spray. Bare copper corrodes into a green oxide layer over time in marine and bilge environments, which increases resistance and heats the connection. Tinned copper looks silver rather than orange when you strip the insulation. Costs a little more upfront; lasts a lot longer in wet or salty environments.