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| "Voltage Drop Index" method of determining
wire size needed | Amps x Distance (one way) | = VDI
| | Voltage x Percent Loss |
| VDI | | Gauge | | Example | | 1 | = | #16 | | 10 Amps Current | | 2 | = | #14 | | 100 Feet one way distance | | 3 | = | #12 | | 24 Volt system | | 5 | = | #10 | | 2% Loss | | 8 | = | #8 | | | | 12 | = | #6 | | 10 x 100 = 20.83
24 x 2 | | 20 | = | #4 | | | 34 | = | #2 | | | | 49 | = | 1/0 | | Use #4 wire | | 62 | = | 2/0 | | | | 78 | = | 3/0 | | | | 99 | = | 4/0 | | |
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