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The APC AP4452A is a rack-mounted automatic transfer switch (ATS) designed to provide continuous power to critical loads by switching between two independent power sources without interruption. Rated at 120 volts and 20 amps with an L5-20 input configuration, this unit fits into standard rack enclosures and is intended for enterprise-level power distribution applications. It is typically installed by licensed electricians or qualified data center infrastructure technicians responsible for maintaining uptime in server rooms, network closets, and similar mission-critical environments.
The AP4452A is suited for enterprise data center and network rack installations where dual power feed redundancy is required. It accepts two separate input feeds, automatically transferring the connected load to the available source if the primary feed fails. This makes it appropriate for environments housing servers, network switches, storage arrays, and other rack-mounted equipment that cannot tolerate power interruptions. It is sold as a single unit.
Designed as an OEM-style rack automatic transfer switch for enterprise power distribution applications requiring 120-volt, 20-amp dual-feed redundancy in standard rack enclosures.
Installation should be performed by a licensed electrician in accordance with applicable NEC guidelines for branch circuit and power distribution equipment. Power down or de-energize both input feed circuits before making any wiring connections to the unit. Verify that both source circuits are properly sized and protected per local electrical code before commissioning. Do not exceed the rated 20-amp continuous load capacity of the unit.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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