【Daily Topic】【Electrical Edition 20160809】
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Participation reward: 2 Wealth. Reward for correct answer: 9 Wealth. Question: What areas of electrical equipment need to be grounded?
GB50169 specifies that, in general, the metal enclosures of all live electrical devices should be grounded. Metal containers (pipes) containing flammable and explosive materials also need to be grounded, as do the neutral points of transformers, the metal parts of cable conduits, and the mounting brackets for electrical equipment.
1) Motors, transformers, electrical appliances, lighting fixtures, and the bases and enclosures of portable and mobile electrical devices. 2) Transmission devices for electrical equipment, such as the operating mechanisms of switches, etc. 3) The frame of the distribution panel. 4) The structure of indoor and outdoor power distribution installations, as well as the metal fences and doors located near live parts. 5) Enclosures of cable junction boxes and terminal boxes, outer sheaths of power cables, and steel pipes for running wires. 6) Secondary winding of the transformer. 7) Poles of power lines equipped with lightning conductors. 8) Metal and reinforced concrete pole towers of overhead power lines without lightning protection conductors, in residential areas with non-asphalt surfaces, for low ground short-circuit currents.
The metal enclosures of all charged items must be grounded; the metal containers (pipes) used for flammable and explosive materials also need to be grounded. The neutral point of transformers, the metal parts of cable ducts, and the mounting brackets for electrical equipment must all be grounded as well.
The metal enclosures of all charged items must be grounded; the metal containers (pipes) used for flammable and explosive materials also need to be grounded. The neutral point of transformers, the metal parts of cable ducts, and the mounting brackets for electrical equipment must all be grounded as well.
Generally, the metal enclosures of all charged items should be grounded; the metal containers (pipes) used for flammable and explosive substances also need to be grounded. The neutral point of transformers, the metal parts of cable conduits, and the mounting brackets for electrical equipment must all be grounded as well.
GB50169 specifies that, in general, the metal enclosures of all live electrical devices should be grounded. Metal containers (pipes) containing flammable and explosive materials also need to be grounded, as do the neutral points of transformers, the metal parts of cable conduits, and the mounting brackets for electrical equipment.
GB50169 specifies that, in general, the metal enclosures of all live electrical devices should be grounded. Metal containers (pipes) containing flammable and explosive materials also need to be grounded, as do the neutral points of transformers, the metal parts of cable conduits, and the mounting brackets for electrical equipment.
The metal enclosures of all charged items must be grounded; the metal containers (pipes) used for flammable and explosive substances also need to be grounded. The neutral point of transformers, the metal parts of cable conduits, and the mounting brackets for electrical equipment must all be grounded as well
1) Motors, transformers, electrical appliances, lighting fixtures, and the bases and enclosures of portable and mobile electrical devices. 2) Transmission devices for electrical equipment, such as the operating mechanisms of switches, etc. 3) The frame of the distribution panel. 4) The structure of indoor and outdoor power distribution installations, as well as the metal fences and doors located near live parts. 5) Enclosures of cable junction boxes and terminal boxes, outer sheaths of power cables, and steel pipes for running wires. 6) Secondary winding of the transformer. 7) Poles of power lines equipped with lightning conductors. 8) Metal and reinforced concrete pole towers of overhead power lines without lightning protection conductors, in residential areas with non-asphalt surfaces, for low ground short-circuit currents.