GXL 10 AWG tinned automotive wire — stranded tinned copper conductor, cross-linked polyethylene insulation, sold per metre

Elevate Automotive

10 AWG GXL Tinned Automotive Wire

GXL-10-BK

10 AWG GXL tinned automotive wire. Tinned copper conductor, cross-linked polyethylene insulation, SAE J1128 rated. Sold per metre in a full colour range.

SoldPer metre

Gauge10 AWG / 6mm²

Max current40A up to 3m

$5.80

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Universal fitment12V, 24V, 36V and 48V dual-battery, DC-DC charger, fuse block and lighting circuits. SAE J1128 primary wire is rated up to 60V DC.

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A 10 AWG GXL tinned automotive wire, sold per metre in a full colour range. Runs mid-to-high-current DC circuits like fridge dedicated feeds, sub-panel fuse-block feeds up to 25A, single-bar driving lights, horn and accessory relays. Fits 4WD cabin and canopy wiring, caravan house-side distribution, boat DC panels and workshop bench wiring. For DC-DC chargers, direct dual-battery feeds carrying full charge current, air compressors or winches, step up to 6 B&S (13.3 mm²) or heavier — see the notes under the current-rating table.

Cross-linked polyethylene insulation with a general-purpose wall, thicker than TXL's extra-thin wall, so it takes more abrasion in chassis runs and engine bays. Stranded tinned-copper conductor resists oxidation in marine and bilge environments. Meets SAE J1128 GXL, rated from −40°C to +125°C, and holds up to petrol, diesel, engine oil and common solvents.

Match the gauge to the current draw and the run length. Under-size the cable and it heats up, drops voltage and eventually fails. Winches, starter motors and big inverters draw 200A or more; they need much heavier cable like 2 AWG or 1/0 AWG, not GXL primary wire.

Cable size guide

Match the AWG to the current draw AND the run length. When in doubt, step up one size.

AWG	Max amps at 3m	Max amps at 4.5m	Max amps at 6m	Common uses
10 AWG (this cable)	40A	30A	25A	Fridge dedicated feeds, sub-panel fuse-block feeds (≤25A total), single-bar driving lights, horn and accessory relay feeds
14 AWG	20A	15A	10A	Relays, fuel pumps, horns, ignition coils, individual headlight circuits
18 AWG	10A	7.5A	5A	Sensors, LED signal lights, switch feeds, dash indicators, CAN-bus wiring

Not for DC-DC chargers: Redarc's BCDC Wiring Kit guide specifies 8 AWG (7.7 mm²) minimum on every BCDC model, including the smallest 25A unit at the shortest run. Not for air compressors: ARB Twin draws 45A continuous, which exceeds 10 AWG once derated for engine-bay bundling. Not for winches, starter motors or 1000W+ inverters (200A+): use 2 AWG to 1/0 AWG (35 mm² to 50 mm²). Not for direct dual-battery feeds carrying full charge current (50–100A): use 6 B&S (13.3 mm²) minimum.

14 AWG TXL Automotive Wire $2.20

18 AWG TXL Automotive Wire $1.60

Tinned copper — corrosion resistance for marine and bilge use
General-purpose XLPE — thicker wall than TXL, extra abrasion resistance
SAE J1128 rated — same automotive spec OEMs use
−40°C to +125°C — engine bay or chassis run
Chemical resistant — oil, fuel and solvents
Sold per metre — full colour range for wire ID

Conductor

Gauge: 10 AWG

Material: Tinned copper

Insulation

Material: XLPE (cross-linked PE)

Wall thickness: General-purpose

Resistance: Oil, fuel, abrasion

Current rating

Up to 3m: 40A

Up to 4.5m: 30A

Up to 6m: 25A

Compliance

Standard: SAE J1128 GXL

Temp range: −40°C to +125°C

12V, 24V, 36V and 48V dual-battery, DC-DC charger, fuse block and lighting circuits. SAE J1128 primary wire is rated up to 60V DC.

Dual-battery and auxiliary power feeds

DC-DC chargers, fuse blocks and distribution panels

Marine, 4WD and off-grid solar wiring

Low-current signal or sensor wiring. Use 18 AWG, a thinner gauge saves weight and cost.

Household mains wiring. This is DC automotive spec, not AC-rated.

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.

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