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NEMA 4 Control Box

NEMA 4 Control Box

Replaces NEMA 3R Control



The NEMA 4, Watertight pump controls are equipped with Circuit Breakers, or Motor Starter Protectors, that provides overload, short circuit protection, and locked rotor by disconnecting power to the pump if any of these conditions occur, also serves as a manual across-the-line motor control which includes a reset button to resume pumping once conditions have been corrected. 

All controls have through the door rotary On-Off switch, except 3/4 & 1HP, 115 & 230 volt models which utilize an On-Off toggle switch located on bottom of enclosure. 

Single phase controls also include, start and run capacitors. 3/4 and 1HP models are also equipped with a 6 foot power cord with 3 prong plug.  ENCLOSURE - Fig. A & B: Door is fabricated from 16 gauge steel and the body of 14 gauge, ANSI-61 gray polyester powder finish inside and out. Continuous hinged cover with stainless steel clamps and screws to assure a watertight seal. Oil resistant neoprene gasket. 

  • ENCLOSURE - Fig. C: Same as above except, does not have Stainless clamps, but has quarter turn latch.

  • START RELAY: Single Phase - For Capacitor Start and Motor Protection

  • SWITCH - Toggle: Used on 3/4 & 1HP Single Phase - “ON-OFF” toggle, UL listed

  • SWITCH - Rotary: Used on 2Hp through 50HP - The door locking device prevents opening of the control cabinet door in the “ON” position of the motor starter protector. 

  • CAPACITORS: Single Phase - 3/4 through 6HP: Start and/or Run capacitors as required

  • FUSE: Single Phase - 3/4 & 1HP, 20 amp with 12 gauge fuse holder

  • Built and Labeled to UL 508A standard with NEMA 4 rating.

  • CIRCUIT BREAKER: Thermal magnetic, molded case, for short circuit protection. UL listed, CSA certified, IEC rated.  

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  • MOTOR START PROTECTION (MP): Motor starter protectors features a manual On-Off switch, Class 10 bimetallic overload relay and magnetic trip elements for short circuit protection.


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