18 AWG M22759/32 Tefzel Wire for Motorsport Wiring
18 AWG M22759/32 Tefzel wire is commonly used in motorsport, performance automotive, race car and custom wiring harness builds where compact size, low weight, heat resistance, chemical resistance and long-term reliability matter.
18 AWG is a practical choice for medium-current wiring circuits where 20 AWG may be too small but larger power cable is not required. It is commonly used for coil power, injector power, solenoids, small pumps, actuator wiring, lighting, PDM outputs and general motorsport harness construction.
12Volt Motorsports stocks 18 AWG Tefzel wire in common colours for professional harness construction. We are based in Altona Meadows, Melbourne and ship Tefzel wire Australia-wide.
What is 18 AWG Tefzel Wire Used For?
18 AWG Tefzel wire is typically used for circuits that need more current capacity than 20 AWG while still keeping the harness compact. Typical uses include coil power wiring, injector power wiring, small solenoids, actuator wiring, lighting circuits, small pumps and medium-current PDM outputs.
It is not normally used for high-current loads such as large fuel pumps, thermofans, main battery feeds or starter circuits. For those circuits, a larger wire size should be selected based on current draw, run length, voltage drop, connector rating and circuit protection.
Common 18 AWG Tefzel Wire Applications
| Application |
Suitability |
| Coil power wiring |
Commonly suitable depending on coil current, run length and circuit protection |
| Injector power wiring |
Commonly suitable depending on injector type, current draw and grouping |
| Solenoids and actuators |
Often suitable depending on current draw and duty cycle |
| Small pump wiring |
May be suitable for small pumps where current draw and voltage drop are confirmed |
| Lighting circuits |
Suitable for many low to medium-current lighting circuits |
| PDM outputs |
Suitable for medium-current outputs when the PDM current limit protects the wire and load |
| Large fuel pumps or thermofans |
Usually too small. Use a larger wire size selected for the actual load |
How Do I Choose the Right Tefzel Wire Size?
Wire size should be selected based on current draw, circuit length, voltage drop, ambient temperature, bundling, connector rating, terminal rating, fuse rating and PDM current limit. Do not choose wire size from current draw alone.
18 AWG is useful for medium-current motorsport wiring, but high-current circuits and long cable runs may need a larger wire size. Always check voltage drop and make sure the fuse or PDM output protects the wire and connected device.
For a more detailed reference, download our Tefzel wire size, colour and ampacity chart.
Download the Tefzel Wire Size, Colour and Ampacity Chart
What Should I Use With 18 AWG Tefzel Wire?
18 AWG Tefzel wire is commonly used with Raychem DR25 heatshrink, adhesive-lined heatshrink, Deutsch DT connectors, Deutsch DTM connectors, ECU plugs, splice sleeves, labels and harness documentation.
Raychem DR25 is used as the outer harness sleeving. Adhesive-lined heatshrink is used for sealing, splice protection and strain relief. Deutsch DT connectors are commonly used for medium-current motorsport wiring branches, while Deutsch DTM connectors are commonly used for smaller signal and low-current branches.
Why Buy 18 AWG Tefzel Wire From 12Volt Motorsports?
12Volt Motorsports is a Melbourne-based motorsport wiring specialist. We do not just sell Tefzel wire, Raychem DR25 and harness materials. We use these products in real custom wiring harness builds, ECU installations, PDM wiring, engine bay wiring and motorsport electrical systems.
If you are unsure whether 18 AWG is the right size for your circuit, contact us before ordering. We can help you choose the right wire size, colour, DR25 size, connector and related harness materials.
Related Motorsport Wiring Products
Need Advice?
Call us on 0458 102 134 or email 12voltmotorsports@gmail.com. We are happy to help you work out whether 18 AWG Tefzel wire is suitable for your wiring project.
Frequently Asked Questions
Where can I buy 18 AWG Tefzel wire in Australia?
12Volt Motorsports stocks 18 AWG M22759/32 Tefzel wire in Australia in common motorsport wiring colours. We are based in Melbourne and ship Australia-wide.
What is 18 AWG Tefzel wire used for?
18 AWG Tefzel wire is commonly used for coil power, injector power, solenoids, small pumps, actuator wiring, lighting, PDM outputs and medium-current motorsport wiring circuits.
Is 18 AWG Tefzel wire suitable for coil wiring?
18 AWG Tefzel wire is commonly used for coil power wiring, but the correct size depends on the coil current draw, run length, connector rating and circuit protection.
Can I use 18 AWG Tefzel wire for fuel pumps?
18 AWG may be suitable for some small pumps, but most fuel pump circuits need larger wire selected for current draw, run length, voltage drop and circuit protection.
Can I use 18 AWG Tefzel wire for thermofans?
Usually no. Thermofans often have high current draw and high inrush current, so larger wire is normally required. Size the circuit based on the fan current, cable length, connector rating and protection method.
Do you ship 18 AWG Tefzel wire Australia-wide?
Yes. We ship 18 AWG Tefzel wire to Sydney, Brisbane, Adelaide, Perth, Canberra, Hobart, Darwin and everywhere in between.
