Cut Sheet

Commercial Products
Switch and Outlet BOxeS and cOverS
Visit our website at www.appletonelec.com or contact us at [phone].
© February 2015
1421
NEC/CEC:
UL Standard: 514A
UL Listed: E2527
NEMA: OS-1
4” Square Boxes - 1-1/2" Deep
With Knockouts
Depth
(inches)
Wiring Cubic
Inch Capacity
Knockout Description
Weight per 100
kg (lb)
Catalog Number
(Universal No.)
Sides Ends Bottom
1-1∕4 18.0 (10)1∕2”
— (5)1∕2”
27.67
(61.0)
4SL-1/2
(52141-1/2)
1-1/4" Deep, Drawn
1-1∕2
21.0 (12)1∕2” — (4)1∕2”
33.11
(73.0)
4S-1/2
(52151-1/2)
1-1∕2 21.0 (12)1∕2” — (4)1∕2”
33.11
(73.0)
4S-1/2RD 
1-1/2" Deep, Welded
1-1∕2 21.0 (12)1∕2”
— (5)1∕2”
33.11
(73.0)
4S1/2-DR
(52151-1/2)
1-1/2" Deep, Drawn
1-1∕2 21.0 (8)3∕4”
—
(2)1∕2”
(2)3∕4”
30.39
(67.0)
4S-3/4
(52151-3/4)
1-1/2" Deep, Welded
1-1∕2 21.0 (8)3∕4”
—
(2)1∕2”
(2)3∕4”
30.39
(67.0)
4S3/4-DR
(52151-3/4)
1-1/2" Deep, Drawn
 For fire alarm circuits. Red powder coat finish.