Abstract
In Hong Kong buildings, large, parallel-connected single-core cables are often used to connect transformers to main low-voltage switchboards. As power consumption in buildings increases, overheating problems associated with such cable installations have become a concern. The paper investigates current distribution among parallel-connected single-core cables in a multi-phase distribution system. A general current-distribution prediction method is proposed and validated experimentally. The impact of cable, source and installation parameters, as well as the presence of a steel cable tray, is reported. The current distribution associated with the Hong Kong practice of parallel cable installations is evaluated, and recommendations for the design and installation are presented.
Published Version
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