Cut Sheet

Commercial Products
Switch and Outlet BOxeS and cOverS
Visit our website at www.appletonelec.com or contact us at [phone].
© February 2015
1459
NEC/CEC:
UL Standard: 514A
UL Listed: E2527
NEMA: OS-1
4” Octagon Concrete Boxes and Back Plates
Depth
(inches)
Wiring Cubic
Inch Capacity
Knockout Description
Weight per 100
kg (lb)
Catalog Number
(Universal No.)
Sides Ends Bottom
4" Octagon Concrete Boxes with 1/2” and 3/4” Single Row Knockouts 
2 25.0
(4)1∕2”
(4)3∕4”
— —
23.59
(52.0)
OCR2
(54531)
2-1∕2 31.0
(4)1∕2”
(4)3∕4”
— —
31.75
(70.0)
OCR2-1/2
(54541)
3 37.0
(4)1∕2”
(4)3∕4”
— —
37.65
(83.0)
OCR3
(54551)
3-1∕2 43.0
(4)1∕2”
(4)3∕4”
— —
45.36
(100.0)
OCR3-1/2
(54561)
4
49.0
(4)1∕2”
(4)3∕4”
— —
51.26
(113.0)
OCR4
(54571)
4" Octagon Back Plate, No Stud 
Flat — — —
(3)1∕2”
(2)3∕4”
13.61
(30.0)
OCP
(54712)
4" Octagon Back Plate, with 3/8" Fixture Stud 
Flat
— — —
(2)1∕2”
(2)3∕4”
13.15
(29.0)
OCP-3/8
(54717)
 Not rated for ceiling fan usage.
 Rings furnished with screws for back plates. Back plate mounting holes are designed to slide onto ring screws.