Connecting with the grounding busbar is called grounding. This is a common saying (may also be a foreign language, a foreign word), which is to anthropomorphize several lines on the electrical line, each line is called a gas. For example: a household switch panel, if there is only one power cord in the junction box, it is called “single gasâ€. If there are two power cords in the junction box, it is called "double gas". Similarly, the grounding wire is also called a gas, called "ground gas."
Grounding gas is also a special term in electrical measurement. In order to prevent the influence of static field voltage on the measurement of insulation between cables or transformers, motors, etc., a ground end of the megohmmeter is connected to the outer casing of the cable jacket or electrical appliance.
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