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Basic use of lighting supplies

Basic use of lighting supplies

Basic use of lighting supplies


Where there is light, there is human civilization. Tens of thousands of years ago, human beings have learned to use natural fire to prevent cold, barbecue and light. More than 3000 years ago, people began to use simple lamps to carry candles and write the history of civilization. From rough stone lamps to bronze lamps, ceramic lamps to modern electric lamps, the historical changes of lamps and lanterns have been deeply imprinted by the times, and are also the epitome of social economy and culture.

From bamboo, wood, iron, bronze, jade, silver to pottery and porcelain, the lamps reflect the evolution and development of texture.

Back in history, light and fire are inseparable. Where there is fire, there is light. In ancient times, human ancestors used branches to light a fire. This is the earliest lamp in human history. At that time, the torch was even the most advanced.

In the Neolithic Age, oil lamps using oil as fuel began to appear. First, the skull of wild animals, clam shells or stone grooves were used as lamps. Later, porcelain lamps, copper lamps and iron lamps were made of ceramics and metals. Each lamp had a wick in it to fully burn and produce less black smoke. In order to keep the oil lamp from smoking, people invented a lamp with a lampshade. Later, people invented candles made of solidified oil, which are easy to use and carry. In the 18th century, people improved the oil lamp, raised the oil pool of the oil lamp, and connected the lamp cap with the oil pool with an oil pipe. Due to sufficient oil supply, the lamp flame is vigorous and bright. In 1745, people made kerosene lamps, and soon gas lamps appeared. Electricity was discovered in the early 19th century. Since then, the lamp and electricity have been inextricably linked.

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National standards for terminals 2022-11-22 17:50:00
This standard is equivalent to the international standard IEC455 (1988) General Rules for the Identification and Application of Alphanumeric Systems for Equipment Terminal Blocks and Specific Conductor Terminals. Subject Content This standard specifies various methods for identifying terminals of electrical equipment (hereinafter referred to as equipment), and formulates a general rule for identifying equipment terminals and specific wire terminals with an alphanumeric system. This standard is applicable to the identification of terminal blocks of equipment (such as resistors, fuses, relays, contactors, transformers, rotating motors, etc.) and combinations of these equipment, as well as the identification of specific wire ends. If necessary, the detailed application of these general rules to some products and the necessary auxiliary identification methods can be given in the relevant standards. recognition methods One or more methods can be used to identify equipment terminals and specific wire terminals: a. The marking system of related products can be used to determine and identify the actual or relative position of equipment terminals or specific wire terminals; b. Use the marking system of relevant products to determine and identify the color marking of equipment terminal blocks and specific wire terminals; c. Graphical symbols specified in GB5465 shall be adopted. If auxiliary symbols are required, they shall be consistent with the figures in GB4728; d. The alphanumeric symbols specified in Chapter 5 of this standard shall be used.
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