I don't think, that capacitance of cables or even bus bars will be of much importance for low frequency (e.g. up to 100 kHz) circuits. For "long distance" cables, you can refer to catalog data.
The low frequency point involves, that the analysis can be pure AC magnetics (magnetostatic + skin/proximity effect) respectively electrostatic, if capacitance really matters. FastHenry is good for arbitrary 3D conductor geometries as long as permeability of materials can be ignored. You'll possibly find some situations, where large steel mounting plates should be considered in analysis.