Capacitor Start/Induction Run Submersible Motor Control, 1/2 hp

Myers SMC-IR0521-01 – 1/2 HP Submersible Motor Control Box, 230V The Myers SMC-IR0521-01 is a submersible motor control box engineered for use with 3-wire, 1/2 HP, 230V submersible motors operating at 60 Hz. This unit provides the necessary starting and running components to support pump operation in residential water systems. Designed with field serviceability and outdoor installation in mind, it is housed in a NEMA 3R-rated steel enclosure. Key Technical Specifications: Motor Compatibility: 3-wire, 1/2 HP submersible motors Voltage: 230 VAC Frequency: 60 Hz Enclosure Rating: NEMA 3R, weather-resistant Mounting Style: Wall-mounted, pre-punched knockouts for conduit Dimensions: 4.9 in W × 2.8 in D × 8.5 in H Reset Feature: External manual overload reset Finish: HardBond™ powder coating for enhanced corrosion resistance Warranty: 1-year limited Product Features: Heavy-Duty Internal Components – Includes a start capacitor, run capacitor, and relay rated for high-load cycling and durability in demanding pump systems. Corrosion-Resistant Enclosure – Finished with a HardBond™ protective coating to extend service life in humid or wet locations. Overload Protection – Integrated thermal overload with external reset minimizes downtime and provides quick serviceability. Large Terminal Lugs – Accepts wire up to #4 AWG for secure, high-current connections. Flexible Conduit Access – Multiple knockout sizes accommodate standard electrical conduit fittings. Wiring Reference Guide – Internal schematic included for straightforward field connections. Installation Considerations: This motor control box should be installed by a licensed electrician or qualified pump installer to ensure electrical safety and compliance with NEC and local code requirements. Mount vertically in a location protected from direct spray but accessible for service and reset access. Confirm voltage and motor match before energizing the control. Contractor Use Case: The SMC-IR0521-01 is commonly deployed in 4" residential well systems requiring dependable motor starting control. Its robust mechanical relay and weather-sealed housing make it suitable for outdoor pump installations including pump houses, well pits (with proper ventilation), and exterior wall-mount setups.