a. All metallic components shall be supplied with a grounding path.
NOTE This requirement includes structural elements, spot shielding, transformer cores, metal packaging of components, unused tracks on PCBs etc. Also included are cables used for testing on the ground but unused in orbit and cables that become temporarily isolated through the operation of a relay, e.g. antenna feeds when in redundant mode.
b. Conductive paths shall have a resistance to ground of less than 1012 W.
c. Cables running external to the main spacecraft body, should have the minimum thickness of dielectric insulation consistent with their primary function.
NOTE This arises from the general rule that higher electric fields can arise in thicker dielectrics.