What size wire Should I use for an 80' run from battery bank to RV trailer for 50 amp hook up
Wire size
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12 volts = 4/0, 600 watt circuit
24 volts = 2/0, 1200 watt circuit
48 volts = 2 AWG, 2400 watt circuit
240/120 volts 6 AWG, 12,000/6000 watt circuit. Code minimum which you could use on any voltage regardless of distance or voltage of 50 amps.Last edited by Sunking; 04-19-2018, 12:36 PM.MSEE, PE -
As Sunking mentioned it all depends on the voltage in that 80 foot cable.
The size wire will be greatly different between a 240V AC circuit and 48V DC circuit.
By the way. Most RV's that require a 50 amp hook up need it for the Air Conditioners. (My Class A is like that). Those puppies will require a lot of surge capacity for the DC to AC inverter or it will shut down due to the voltage being too low.Comment
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The 80' line would be 240 V from the 48 V inverter And I won't be using both air conditioners at the same timeComment
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Thank you sunking And super moderator You mentioned the surge capacity that the air conditioners from the RV would be pulling I have a 48 V 4400 Magnus sign invertor I believe it has a 8500 W Surge capacity do you think that could handle The air conditionerComment
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My concern for you are the wires between the 48V battery system and the inverter. An 8500 W unit can see close to 200 Amps so I hope those wires are big enough and they are protected by the correct size fuse.Comment
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Good thing it will be in an RV so he can get out quickly if he makes a poor crimp on a connector or a connection vibrates loose while driving. May be a moot point because I doubt his batteries will last long. Me thinks he does not realize a 200 amp load requires a 2000 AH battery. At 48 volts weighs around 5000 pounds.Last edited by Sunking; 04-19-2018, 02:37 PM.MSEE, PEComment
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I like the way you put it Out there Sun king I would say you're correct I don't know what it requires to have a 200 amp loadSo I guess my measly 450 amp hour battery bank is not going to cut itComment
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If you want to include solar for your RV I would focus on running specific loads from the inverter and not try to power the entire RV.Comment
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