What is the meaning of grounding gas? - Solutions - Huaqiang Electronic Network

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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 gas”. 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.