Basic knowledge of switch socket and electrician
1. Overview of electrical products
Electrician products cover a wide range, it is a device that provides power and electrical control to end users, including switch & socket, circuit breakers, integrated wiring, security systems, etc., also known as building electrical accessories.
Electrical products in a narrow sense usually only refer to switches and sockets in building electrical accessories.
2. Explanation of common terms used by electricians
Circuit: a conductive loop composed of metal wires and electrical and electronic components.
Voltage: The potential or potential difference between two points in volts (V). The voltage usage of different countries in the world is also different. For example, Japan uses 110V voltage, and China uses 220V-240V.
Electric current: The movement of positively or negatively charged particles (such as electrons), accompanied by observable effects such as heat, magnetic field, or chemical changes. The unit is A (ampere). Current is the amount of charge passing through a certain section of the wire per unit time. The current depends on the cross-section area of the wire. The larger the cross section area, the larger the current.
Overcurrent: A phenomenon that exceeds the rated current of the device. Long-term overcurrent will cause the temperature of power supply carriers such as wires, switch & socket, and multi-functional movable socket to rise.
Overload: The phenomenon of exceeding the rated power of the equipment. Increased overload, accompanied by increased current. The long-term overload will cause the temperature of the power supply carrier such as the wire, switch & socket and multi-functional movable socket to rise.
Short circuit: In the operation of the power system, an infinite current flows when an abnormal connection occurs between the phase line and the phase line or between the phase line and the ground line (neutral line) (Same as no load or infinitesimal load value). The value is much larger than the rated current.
The short circuit generates high temperature instantly, which can easily cause fire.
In the actual work of electricians, there are ways to easily produce short circuits, such as wrong wiring, excessive load and excessive current, which lead to the melting of the wire insulation rubber and the short circuit formed by the sticking of the live wire and the neutral wire. Short circuit is an extreme manifestation of overcurrent.
Disconnect (Open circuit): Refers to the fault that the electrical circuit is disconnected, such as the power wire is cut off.