SJE-Rhombus SES Controls Build-A-Panels

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Starter Boxes

Three Phase Starter Boxes

Starter Boxes Provide Three Phase Motor Control

Starter boxes provide a reliable means of controlling either one 208V three phase motor, one 240V three phase motor, or one 480V three phase motor in water, wastewater and sewage installations.

Starter boxes utilize a control switch to activate a magnetic motor contactor to run the motor on and off and have an adjustable overload that allows for easy adjustment of motor overload current.

Common applications include pump chambers, sump pump basins, irrigation systems and air compressor systems.


Starter Boxes


  • NEMA 4X indoor/outdoor enclosure
  • Hand switch for manual pump control
  • Terminal block (motor start)
  • Magentic motor contactor controls pump by switching electrical lines
  • Adjustable motor overload
  • Control breaker (208 VAC and 240 VAC versions)
  • Multi-tap transformer (480 VAC primary) provides fused 120 VAC control voltage
  • Incoming power terminal block (480 VAC version)
  • Ground lug


  • 208V, 240V and 480V models
  • For a complete listing of available options, please view the backside of the catalog page.

UL/cUL Listed

Five-Year Limited Warranty



Starter Boxes


208V and 240V Models: 14 x 12 x 6 inches (35.56 x 30.48 x 15.24 cm)
480V Models: 16 x 14 x 6 inches (40.64 x 35.56 x 15.24 cm)
NEMA 4X (ultraviolet stabilized thermoplastic with removable mounting feet for indoor/outdoor use)

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