Electrical safety distance refers to the safe and reliable distance to human body and objects. Approaching the charged body without danger. Such as between the charged body and the ground, between the charged body and the charged body, between the charged body and the human body, and between the charged body and other facilities and equipment.
You should keep a certain distance. Usually, when working near distribution lines, transformers and distribution devices, the safe distance, maintenance and operation of lines, transformers and distribution devices should be considered.
In order to prevent the insulation of electrical equipment from being damaged, the grounding voltage of the metal shell of electrical equipment should be limited to a safe value to avoid electric shock and harm to human body, and the part of electrical equipment equivalent to conductor should be grounded.
Such as lighting appliances, transformers, mobile or handheld electrical equipment and other electrical appliances shell and metal base; Control, protection and distribution panel frame; Some transmission equipment of electrical equipment; Brackets or pedestals of various electrical equipment in the substation; Metal shell of household appliances.
Steel bars or metal frames of reinforced concrete structure of indoor and outdoor distribution devices and metal doors or metal fences close to live parts; Metal shell, cable skeleton and screw pipe of junction boxes and junction boxes for AC and DC power cables.