1.5.5 SwitchPros Ground Bus¶
Type: Low-Current Ground Distribution Bus Bar
Model: Blue Sea 2105 MaxiBus
Manufacturer: Blue Sea Systems
Product Page: Blue Sea 2105 MaxiBus
Specifications¶
- Capacity: 250A AC/DC continuous, 300V AC / 48V DC max
- Terminals: 12x #10-24 screws, 2x 5/16"-18 studs
- Location: Near SwitchPros controller (engine bay or rear cabin area)
- Full Specs: Blue Sea 2105
Stud/Terminal Assignment¶
| Stud/Terminal | Connection | Wire Gauge | Distance | Max Current | Notes |
|---|---|---|---|---|---|
| Stud 1 (5/16") | Chassis Ground (INPUT) | 1/0 AWG ✓ | Variable | ~100A total | Primary bus ground - to frame rail |
| Stud 2 (5/16") | [Available] | - | - | - | Future high-current ground |
| Terminal 1 (#10-24) | SwitchPros controller | 14 AWG ✓ | ~2 ft | <1A | Controller logic ground (via harness) |
| Terminal 2 (#10-24) | Headlights (LP6) - pair 1 | 16 AWG ✓ | ~10 ft | ~8A | See Headlights |
| Terminal 3 (#10-24) | Headlights (LP6) - pair 2 | 16 AWG ✓ | ~10 ft | ~8A | See Headlights |
| Terminal 4 (#10-24) | Tail/brake/reverse (PMU OUT21+22) | 16 AWG ✓ | ~12 ft | ~6A | Integrated unit, single ground wire |
| Terminal 5 (#10-24) | DRL/Parking (PMU OUT14) | 16 AWG ✓ | ~10 ft | ~8A | Front marker/DRL lights |
| Terminal 6 (#10-24) | Roof lights (8x XL Sport) | 14 AWG ✓ | ~8 ft | ~18A | Single circuit via XL Linkable harness |
| Terminal 7 (#10-24) | Ditch lights | 16 AWG ✓ | ~8 ft | ~8A | Auxiliary lighting |
| Terminal 8 (#10-24) | Rock lights | 16 AWG ✓ | ~6 ft | ~5A | Auxiliary lighting |
| Terminals 9-12 (#10-24) | [Available] | - | - | - | Future expansion (4 terminals) |
Utilization: 9 of 14 used (1 stud + 8 terminals used, 1 stud + 4 terminals available)
Purpose: Lighting ground return for all SwitchPros-controlled loads
Installation¶
Mounting: Near SwitchPros controller (rear cabin area)
Ground Path: Bus → chassis ground (1/0 AWG, handles ~100A total lighting load) → frame rail → START battery negative bus
Critical: Clean metal-to-metal connection to chassis, accessible for lighting ground wires