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Electrical Junction Boxes
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4" Octagon Extension Rings
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1-1/2" Deep with Conduit Knockouts
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1-1/2" Deep with Conduit Knockouts
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Application:
These extension rings with conduit knockouts
provide added wire capacity to existing octagon (8B) boxes
and serve as outlet boxes for surface conduits.
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Advantages::
Garvin Industries electrical box extension
rings prevent the labor-intensive removal of older outlet
boxes, connectors and devices when extra wire capacity is
needed. Adapter slots on the bottoms of the extension rings
allow easy, slide-on attachment to existing electrical junction
boxes.
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Field Names::
Extension rings, extension box, 8B extension
collar, add-a-depth box, 8B extension ring, 4-O extension
box, box extender, junction box adapter, 8BO extension
box, octagon extension ring, octagon extension, 8B octagon
extension, ceiling extension ring, 4” ceiling extension ring.
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Click on links below to view more details about the products.
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4 Styles Available Below
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Item #:
55151-1/2
1-1/2” Deep, 4" Octagon Extension Ring with (4) 1/2" Side Conduit Knockouts
1-1/2” deep, 4" octagon extension rings with (4) 1/2" side conduit knockouts are used to provide added wire capacity to existing octagon (8B) boxes a
(more....)
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Item #:
55151-S
1-1/2” Deep, 4" Octagon Extension Ring with (2) 1/2", (2) 3/4" Side Conduit Knockouts
1-1/2” deep, 4" octagon extension rings with (2) 1/2", (2) 3/4" side conduit knockouts are used to provide added wire capacity to existing octagon (
(more....)
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Item #:
55151-3/4
1-1/2” Deep, 4" Octagon Extension Ring with (4) 3/4" Conduit Knockouts
1-1/2” deep, 4" octagon extension rings with (4) 3/4" side conduit knockouts are used to provide added wire capacity to existing octagon (8B) boxes a
(more....)
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Item #:
55151-VT
1-1/2” Deep, 4" Octagon Plenum Extension Ring with (4) 1/2" Conduit Knockouts
1-1/2” deep, 4" octagon plenum extension rings with (4) 1/2" side conduit knockouts are used to provide added wire capacity to existing octagon (8B)
(more....)
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Cart Summary
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