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id:
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tags:
  - destiny/fleeting
  - type/idea
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# Voltage Drop

> [!info] Ohm's Law
> $$
> V = I \times R \quad R = \frac{ V }{ I }
> $$

$$
Vd = \frac{ I \times R \times L \times M }{ P }
$$

$$
L = \frac{ Vd }{ I \times M } \times \frac{ P }{ R }
$$

where

- $Vd$ = Maximum Voltage Drop in volts
- $I$ = Current in Amps
- $R$ = Resistance in ohms per foot
- $L$ = Length of wire one way in feet
- $M$ = Multiplier
  - $2$ for 1-phase
  - $\sqrt{3}$ for 3-phase
- $P$ = Number of parallel runs