Power & fuses (early sheet)

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power_fuses 2014 RAM 1500 Carputer — SHEET 1: POWER & FUSES (rev 3.10) LINE THICKNESS = wire gauge (THICKER = heavier wire / more current).   RED = positive (fused)   BLUE = negative (NEVER fused)   GREEN = the one chassis bond Gauge→thickness:  2 AWG ▉   4 AWG ▆   6 AWG ▄   8 AWG ▃   10-16 AWG ▂ Every battery fused at its + terminal · Trunk fused BOTH ends · High-current returns to the − bus bar, never chassis · Inverter − goes DIRECT to bus bar, never chassis cluster_starter STARTER SIDE cluster_front FRONT cluster_bed BED starter Starting battery + 2nd lead-acid (winch buffer) dcdc VEVOR 40A DC-DC charger starter->dcdc 6 AWG · 50A fpos FRONT + BUS BAR dcdc->fpos 6 AWG · 50A cfbox Computer fuse/relay box (Pi · router · controller · always-on loads) fpos->cfbox 6-8 AWG · 40-60A bpos BED + BUS BAR fpos->bpos TRUNK +  2 AWG FUSE BOTH ENDS · 100-125A fneg FRONT − BUS BAR ★ STAR GROUND ★ frame FRAME / CHASSIS fneg->frame GROUND BOND 2-4 AWG ★ ONLY chassis tie ★ bneg BED − BUS BAR fneg->bneg TRUNK − 2 AWG b100 Front 100Ah LiFePO4 b100->fpos 100A @ term b100->fneg cfbox->fneg conv 12V→19V converter cfbox->conv 10A (via ESP32 relay) opti OptiPlex 5080 conv->opti 7-10A opti->fneg b440 Bed 440Ah LiFePO4 (removable) Anderson SB175 b440->bneg cont MAIN CONTACTOR 150-200A (NO=fail-safe open) b440->cont 4 AWG · 100-150A @ term pcr PRE-CHARGE Bosch relay + 50W 5Ω resistor b440->pcr 16-18 AWG cont->bpos 4 AWG pcr->bpos thru 5Ω resistor inv Inverter (gate to bed-present) inv->bpos 2-4 AWG · 100-150A inv->bneg DIRECT mppt MPPT (EPEVER) mppt->bpos 6-8 AWG · 40A mppt->bneg pv 400W panels pv->mppt PV

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