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The SIEMENS s56d is a door-in-door front assembly designed for surface-mounted panelboard enclosures. This front assembly measures 56 inches high by 20 inches wide and provides access to the interior of the panelboard without fully opening the outer door. It is engineered for use with P1 and P2 NEMA Type 1 enclosures and is typically installed by licensed electricians during new construction or panel replacement projects where code-compliant, organized electrical distribution is required.
This front assembly is suited for commercial and light industrial applications where surface-mounted panelboard installations are standard. The door-in-door configuration allows service technicians to access circuit breakers and internal components quickly while maintaining the enclosure's integrity. It is a practical solution for facilities requiring frequent panel access without compromising enclosure protection.
Designed to fit typical P1 and P2 NEMA Type 1 panelboard enclosures that are 20 inches wide, as stated by the manufacturer.
Installation should be performed by a qualified, licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. Always de-energize the panelboard and verify the absence of voltage before beginning any work on or near the enclosure. Confirm enclosure dimensions and mounting configuration match the s56d specifications prior to installation. Do not alter or modify the front assembly, as doing so may void compliance with the enclosure's NEMA Type 1 rating.
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