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Top Hat – High Volume Wire Cover

Top Hat – High Volume Wire Cover

The Top Hat – High Volume Wire Cover is a box extension and cover plate all in one. This patent pending design adds an extra 35 cubic inches of box fill to a 4×4 junction box. The Top Hat allows to leave your wires sticking straight out of the box for easy installation. No need to worry about coiling up your wires in order to fit a flat cover plate.

Patent Pending.


5 Pack

9 In Stock$33.99 CAD

Box of 50

32 In Stock$315.99 CAD
$33.99 CAD


  • ULC Approved for USA and Canada
  • Adds 35.8 cubic inches to the existing junction box
  • Plenum Rated
  • Made in USA
  • Suitable for use in air handling spaces
  • Designed for 4×4 junction boxes in dry locations
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Top Hat Flyer


Top Hat Spec Sheet



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