Hi there.

Been prototyping a busbar made from 16mm2 strained copper, but the strained copper is difficult to work with.

Now, I was trying to calculate the wire size using stiff copper wire, for example 3x4mm2 twisted.

So how do you calculate it?

what I mean is, I have two wires going down the length of the pack consisting of 3x4mm2 that’s a total of 24mm2, on the positive side and also on the negative side. Total of 48mm2.

using this calculator i will need 50mm2. https://www.solar-wind.co.uk/info/dc-cable-wire-sizing-tool-low-voltage-drop-calculator

however watching many YouTube videos they don’t even use this wire gauge - so maybe I’m miscalculating something.

im calculating a 48volt system, 3% loss, wire length 1 meter, 200 amp and that gives me 50mm2 wire gauge. Can’t get my head around it, is the 200amp for the entire 14 packs? The current will run through all packs, so I assume it’s 200 amp for each..

Help me

by the way, see my prototype on strained copper busbar.

I have also attached a picture of the underground bunker that i build for my batteries. The wife thinks I’m an idiot.

Been prototyping a busbar made from 16mm2 strained copper, but the strained copper is difficult to work with.

Now, I was trying to calculate the wire size using stiff copper wire, for example 3x4mm2 twisted.

So how do you calculate it?

what I mean is, I have two wires going down the length of the pack consisting of 3x4mm2 that’s a total of 24mm2, on the positive side and also on the negative side. Total of 48mm2.

using this calculator i will need 50mm2. https://www.solar-wind.co.uk/info/dc-cable-wire-sizing-tool-low-voltage-drop-calculator

however watching many YouTube videos they don’t even use this wire gauge - so maybe I’m miscalculating something.

im calculating a 48volt system, 3% loss, wire length 1 meter, 200 amp and that gives me 50mm2 wire gauge. Can’t get my head around it, is the 200amp for the entire 14 packs? The current will run through all packs, so I assume it’s 200 amp for each..

Help me

by the way, see my prototype on strained copper busbar.

I have also attached a picture of the underground bunker that i build for my batteries. The wife thinks I’m an idiot.