Requirements for secondary equipment distribution boxes
Choose the right box based on environment (indoor/outdoor), load capacity, and durability. It takes the incoming power and safely distributes it to different circuits throughout your building. secondary unit substation is a close-coupled assembly consisting of enclosed primary high voltage equipment, three-phase power transformers, and enclosed secondary low-voltage equipment. This document represents the minimum requirements and specifications for the installation of the electrical underground distribution systems fed from padmounted transformation, serving Secondary Service Accounts, to be transferred to Oncor Electric Delivery Company ownership. You must make safety your top priority when working with low voltage distribution boxes.
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