Cut Sheet

Commercial Products
Switch and Outlet BOxeS and cOverS
Visit our website at www.appletonelec.com or contact us at [phone].
© February 2015
1419
NEC/CEC:
UL Standard: 514A
UL Listed: E2527
NEMA: OS-1
4” Octagon Box Extension Rings
With Knockouts
Depth
(inches)
Wiring Cubic
Inch Capacity
Clamp
Type
Knockout Description
Weight per 100
kg (lb)
Catalog Number 
(Universal No.)
Sides Ends Bottom
1-1∕2 15.5
—
(4)1/2”
— —
16.78
(37.0)
4OE-1/2
(551511/2)
1-1/2" Deep
1-1∕2 15.5
—
(2)1/2”
(2)3/4”
— —
17.69
(39.0)
4OE-3/4
(551513/4)
1-1/2" Deep
1-1∕2 15.5
—
(2)1∕2”
— —
44.91
(99.0)
4OE-SPL
(55151-SPL)
1-1/2" Deep
 3-1/2” Cover Hole Centerline.