Find the correct fuse amperage for any DC circuit in your van based on wire gauge and load.
Standard rule: Fuse = Load Amps × 1.25 (125% safety margin)
Motors & pumps: Use slow-blow fuse rated 150-200% of running amps
Inverters: Fuse = (Inverter Watts ÷ Voltage) × 1.25
Critical: Fuse must be ≤ wire ampacity rating
| Wire Gauge (AWG) | Max Ampacity | Recommended Fuse |
|---|---|---|
| 14 AWG | 15A | 10A-15A |
| 12 AWG | 20A | 15A-20A |
| 10 AWG | 30A | 20A-30A |
| 8 AWG | 40A | 30A-40A |
| 6 AWG | 55A | 40A-50A |
| 4 AWG | 70A | 50A-60A |
| 2 AWG | 95A | 70A-80A |