[ VD = 2 \times K \times I \times L / A ]
$$V_d = \frac2 \times L \times I \times \rhoA$$ electrical cable size
[ R = \rho \fracLA ]
Finally, cables must be protected against short circuits. A massive current surge during a fault can turn a cable into a fuse—vaporizing the conductor. [ VD = 2 \times K \times I