Physical and mounting constraints
The AF55SDLN is a panel board front trim from the AF series, measuring 55-1/2 inches by 20 inches wide, designed for surface mounting. The NEMA 1 enclosure rating means it provides indoor protection against incidental contact with live components — no gasket seal against moisture or dust, so plan for a dry, climate-controlled electrical room.
What the NEMA 1 rating means for the installation
NEMA 1 is the most basic indoor enclosure category. It keeps fingers and falling dirt away from energized parts but does not exclude dripping water, condensation, or airborne particulates. For a panel board front trim, that is standard — the trim itself is the access cover over the breaker or switchgear interior, not a standalone cabinet. Verify the back box or gutter space behind it is similarly rated or in a conditioned space.
