Knowledge for Selecting Copper Bars (Main Bars and Branch Bars) - Ensuring Safety by Selecting According to Official Guidelines
【Before】 The selection of the cross-sectional area of the copper bar based on the flowing current has been done using the catalog values from copper bar manufacturers. However, since the allowable current values differ among manufacturers even for the same cross-sectional area, we have prioritized safety by selecting larger cross-sectional areas of copper bars, which has led to increased material costs. ↓ 【After】 When determining the cross-sectional area of the copper bar based on the rated current, it is common to refer to the Japan Electric Power Control System Industry Association standard JSIA303 for cabinet-type distribution boards (III04-2). When prioritizing safety, it is possible to apply the above formula to select the necessary cross-sectional area. *For more details, please refer to the catalog or feel free to contact us.
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**Effect** The copper bar that conducts electricity is selected based on the standards set by the Japan Electric Distribution Control System Industry Association standard JSIA303, cabinet-type distribution boards (III04-2), and the standard specifications for public works (electric equipment construction edition) supervised by the Ministry of Land, Infrastructure, Transport and Tourism. *For more details, please refer to the catalog or feel free to contact us.*
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For more details, please refer to the catalog or feel free to contact us.
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Company information
Hoshimoto Co., Ltd. is a manufacturer that has been producing and selling industrial handles, locks, hinges, handles, copper busbars, and pressed, machined, and cast products for control panels, cubicles, and distribution boards since its establishment. Leveraging the characteristics of manufacturing and sales, we are committed to product development with the motto of creating what is needed. In addition to standard catalog items, we also respond to commissioned processing based on our available equipment (press machines, benders, NC lathes, machining centers, header machines, zinc die casting, milling machines, etc.) as needed. We have obtained ISO 9001:2000 and ISO 14001 certification.