This section contains the requirements for equipment and installation (including manholes, switch vaults and pull boxes) relating to the Sub-transmission, Distribution, and Control of electric power ranging from 600-Volts to 25,000-Volts, such as substations . This section contains the requirements for equipment and installation (including manholes, switch vaults and pull boxes) relating to the Sub-transmission, Distribution, and Control of electric power ranging from 600-Volts to 25,000-Volts, such as substations . Covers wiring, placement, standards, and expert tips for a compliant setup. A distribution box is the heart of any electrical system. It takes the incoming power and safely distributes it to different circuits throughout your building. Shall not be installed in vulnerable to foreign solid impact, strong vibration, liquid. Article 408 covers the requirements for switchboards and panelboards that control power and lighting circuits (Fig.
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