Steel Square Extension Rings - 4 Inch

4" Steel Square Outlet Extension Rings are:

  • For use with 4" square boxes
  • Used when extra cubic inch capacity is needed for additional wiring
  • Available in red for fire alarm applications
Size 4" Square
Depths 1-1/2" or 2-1/8"
Material Steel
Construction Drawn or welded


  • Ideal for exposed work applications, providing an easy method for the installation of electrical devices (switches, receptacles, fans, lights, etc.)
  • Raised ground screw location in the welded boxes saves time in installation
  • Available with pre-installed ground screws and pigtails for increased labor savings
  • Knockouts are suitable for use without a bonding jumper in circuits above or below 250 volts
  • Available in two depths for differing cubic capacity requirements
  • Welded or drawn construction to match customer preference
  • Extensive cover offering to meet various customer applications and needs