Safety electric wire

Abstract

The invention discloses a safety electric wire, which comprises at least two core wires, wherein one of the two core wires is provided with a ring-shaped cross section, all core wires except for the core wire with the ring-shaped cross section are respectively coated with an insulation layer, the core wire with the ring-shaped cross section is wrapped outside the core wires with the insulation layers, and an outer jacket is wrapped outside the core wire with the ring-shaped cross section. Due to the adoption of the safety electric wire, the direct discharging from the phase core to the ground can be prevented, so that high safety can be realized.

Description

technical field [0001] The invention relates to an electric wire, in particular to a safety electric wire. Background technique [0002] Electrical fires account for about 30% to 40% of fire accidents, among which those caused by aging wires and short circuits are the first. Wire short circuit is generally divided into two types: short circuit between core wires and short circuit between phase core and ground. When a short circuit occurs between the core wires, since the loop resistance is small and the short circuit current is large, the fuse will be blown immediately and the circuit will be cut off, so no fire will be caused. When a short circuit (leakage) between the phase core and the ground occurs, due to the large grounding resistance, the leakage current value is usually not enough to blow the fuse, so the short circuit discharge process will continue, so the high temperature caused by the discharge arc will often became the source of the fire. [0003] The existin...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect of insufficient safety of the electric wire structure in the prior art, and to provide a safe electric wire that can avoid the direct discharge and short circuit of the phase core to the ground, thus having extremely high safety

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