Installation of wireless devices, audio, emergency
equipment, or other accessories in a vehicle can sometimes be a daunting
task. With TESSCO's exclusive Wireless Solutions® installation
accessories, you'll get the highest quality at competitive prices for a
good job the first time.
Typical Low Voltage Wire Sizes Guide
| Air Conditioning- 10 GAUGE | Heater Switch- 10 GAUGE |
| Alternator- 10 GAUGE | Horn Button- 13 GAUGE |
| Ammeter- 10 GAUGE | Horn To Relay- 10 GAUGE |
| Cigarette Lighter- 14 GAUGE | Ignition Switch- 12 GAUGE |
| Clock- 18 GAUGE | Low-Amps Circuits- 18 GAUGE |
| Coil Wire- 16 GAUGE | Parking Lights- 16 GAUGE |
| Dome Lights- 16 GAUGE | Radio To Fuse Blocks- 14 GAUGE |
| Driving Lights- 14 GAUGE | Single Bulbs- 18 GAUGE |
| Gauges- 14 GAUGE | Starter To Relay- 16 GAUGE |
| Generator (Charging)- 10 GAUGE | Stoplights- 16 GAUGE |
| Generator To Starter- 16 GAUGE | Tail Lights- 16 GAUGE |
| Headlight Circuit- 14 GAUGE | Turn Signals- 16 GAUGE |
| Headlight Switch To Fuse Block- 12 GAUGE | CD To Fuse Block- 14 GAUGE |
| Heater Leads- 16 GAUGE | Windshield Wiper & Washer- 14 GAUGE |
For safety and best
resultsWhen circuit is longer than 10 feet, always use the next
larger gauge size, which is the next lower even number.
Wire Gauge Selection Table 12 Volt Circuit
| AMPS | 3' | 5' | 7' | 10' | 15' | 20' | 25' |
| 0 to 5 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| 6 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| 7 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| 8 | 18 | 18 | 18 | 18 | 18 | 16 | 16 |
| 10 | 18 | 18 | 18 | 18 | 16 | 16 | 16 |
| 11 | 18 | 18 | 18 | 18 | 16 | 16 | 14 |
| 12 | 18 | 18 | 18 | 18 | 16 | 16 | 14 |
| 15 | 18 | 18 | 18 | 18 | 14 | 14 | 12 |
| 18 | 18 | 18 | 16 | 16 | 14 | 14 | 12 |
| 20 | 18 | 18 | 16 | 16 | 14 | 12 | 10 |
| 22 | 18 | 18 | 16 | 16 | 12 | 12 | 10 |
| 24 | 18 | 18 | 16 | 16 | 12 | 12 | 10 |
| 30 | 18 | 16 | 16 | 14 | 10 | 10 | 10 |
| 40 | 18 | 16 | 14 | 12 | 10 | 10 | 8 |
| 50 | 16 | 14 | 12 | 12 | 10 | 10 | 8 |
| 100 | 12 | 12 | 10 | 10 | 6 | 6 | 4 |
| 150 | 10 | 10 | 8 | 8 | 4 | 4 |
2 |
| 200 | 10 | 8 | 8 | 6 | 4 | 4 | 2 |
For more information contact TESSCO at 800-472-7373 or by email.
