Branch Sizing Helper
Pick a branch fuse & wire that fit your amps and keep voltage drop in check. Assumes copper, short runs, 12 V DC.
| Load Current (A) | — |
|---|---|
| Suggested Fuse (A) | — |
| Recommended Wire | — |
| Est. Voltage Drop | — |
Tip: size the fuse to protect the wire, not just the device.
Heuristics use conservative ampacity (Blue-Sea-style) and DC copper resistances at 20 °C. Always verify with your component manuals and environment.