Bond. The electrical interconnection of conductive parts designed to maintain a common electric potential. Ground. A conducting connection between an electric circuit or equipment and the earth, or to some conducting body that serves in place of the earth. Resistance: when you measure the voltage drop across a known circuit (but not with reference to a known mass or volume). Resistivity: when you measure the voltage drop across a known mass or volume. Continuity: when you measure the voltage drop across an unknown circuit, typically a multi-path network. EARTHING, 737 MAX, LIGHTNING, AIRPLANES, GROUNDING, BOEING, ELECTRICAL, JETS, GROUNDING & EARTHING BELOW-GRADE ELECTRODES, BONDING ABOVE-GRADE GROUNDING & EARTHING SYSTEMS, GROUNDING & EARTHING PRINCIPLES, GROUNDING DEVICES