Complete Rewire Wire Size
Hi all, I feel pretty competent about this since I am a journeyman electrician and I have good experience with 12v wiring. Its just that I have never rewired a travel trailer, just class B RVs.
All wiring will be gutted except exterior clearance lights since the trailer was a kit and built by someone who didn't know what they were doing at all. Anyway...
Plan is for 2 golf cart GC-2 6vs in series on the tongue, progressive dynamics 4000 45A DC mighty mini converter/and AC DC load center, 30 amp ac service.
The DC loads are going to be:
-refrigerator DC element 10 AMPS ( very small old manual change 3 way)
-water pump 4 AMPS
-4 x interior light fixtures 4 AMPS (12W standard bulbs) bulbs
-outdoor light 1 AMP
-fantastic fan 3 AMPS
-furnace 3.5 AMPS
-2 cig lighter ports 30AMPS ( fuse each at 15 amps, probably will never see that level of current)
-300W samlex Pure sine wave inverter (fused 30 amps)
Total 85.5AMPS max theoretical including 30A combined from some imaginary high current cig lighter load.
put a terminal style MRBF 80A fuse on positive of battery. Run #4 wire from fuse about 6 ft to positive bus bar inside a trailer compartment near the mighty mini (probably blue sea brand). Run 2 negative cables from the battery, one #4 from battery negative to the trailer frame and another #4 to a negative bus bar (close to the positive one)
Have a #6 wire going from bus bar to 50A auto reset breaker and then to the mighty mini's positive fuse compartment lug. Attach a #6 positive wire from mighty mini converter output to the second positive lug in the mighty mini fuse board lug. Attach matching size negative wires from bus bar to mighty mini lug and converter output respectively.
Install #8 wire from positive bus to 30A auto reset breaker and then to samlex inverter, with a matching negative wire from negative bus. total wire length 2 feet probably.
consolidate all 12 v branch circuit negative wires onto negative bus bar, all positives to each respective fuse terminal in the mighty mini.
for 120v, put the 30 amp service cord onto a 30A breaker, which in turn supplies and protects the AC bus. 15A breaker for converter supply, 15 amp for convenience receptacles, 15A for an electric on demand hot water. Neutral wires of branch circuits to neutral bus, bond wires to ground bus. Jumper from ground bus to trailer frame. I recall something about having to take a separate chassis bond wire from converter case to trailer frame, but that is for discrete converters like a PD 9100 series I think, not a combination panel like the mighty mini.
phew. A bit of an Essay. Is this more or less what everyone else would do?
All wiring will be gutted except exterior clearance lights since the trailer was a kit and built by someone who didn't know what they were doing at all. Anyway...
Plan is for 2 golf cart GC-2 6vs in series on the tongue, progressive dynamics 4000 45A DC mighty mini converter/and AC DC load center, 30 amp ac service.
The DC loads are going to be:
-refrigerator DC element 10 AMPS ( very small old manual change 3 way)
-water pump 4 AMPS
-4 x interior light fixtures 4 AMPS (12W standard bulbs) bulbs
-outdoor light 1 AMP
-fantastic fan 3 AMPS
-furnace 3.5 AMPS
-2 cig lighter ports 30AMPS ( fuse each at 15 amps, probably will never see that level of current)
-300W samlex Pure sine wave inverter (fused 30 amps)
Total 85.5AMPS max theoretical including 30A combined from some imaginary high current cig lighter load.
put a terminal style MRBF 80A fuse on positive of battery. Run #4 wire from fuse about 6 ft to positive bus bar inside a trailer compartment near the mighty mini (probably blue sea brand). Run 2 negative cables from the battery, one #4 from battery negative to the trailer frame and another #4 to a negative bus bar (close to the positive one)
Have a #6 wire going from bus bar to 50A auto reset breaker and then to the mighty mini's positive fuse compartment lug. Attach a #6 positive wire from mighty mini converter output to the second positive lug in the mighty mini fuse board lug. Attach matching size negative wires from bus bar to mighty mini lug and converter output respectively.
Install #8 wire from positive bus to 30A auto reset breaker and then to samlex inverter, with a matching negative wire from negative bus. total wire length 2 feet probably.
consolidate all 12 v branch circuit negative wires onto negative bus bar, all positives to each respective fuse terminal in the mighty mini.
for 120v, put the 30 amp service cord onto a 30A breaker, which in turn supplies and protects the AC bus. 15A breaker for converter supply, 15 amp for convenience receptacles, 15A for an electric on demand hot water. Neutral wires of branch circuits to neutral bus, bond wires to ground bus. Jumper from ground bus to trailer frame. I recall something about having to take a separate chassis bond wire from converter case to trailer frame, but that is for discrete converters like a PD 9100 series I think, not a combination panel like the mighty mini.
phew. A bit of an Essay. Is this more or less what everyone else would do?
