1" KO Masonry Box
Lets You Step Up to 1" Pipe, Adding
Capacity to Accommodate Extra
Wiring Conductors
Today’s school and light commercial construction is
requiring more wiring capacity than ever before for
power, data, voice, video and security. The extra
conductors are rapidly making 1" conduit a common
upgrade. Until now, there hasn’t been a masonry
box factory-made to accept 1" pipe.
In response to this application, Thomas & Betts
introduces the first 1" KO masonry box. No more need
to waste time and labor at the jobsite, punching large
KOs to accept 1" pipe. In addition to the four standard
knockouts, this single-gang, welded-steel box features
a total of four factory-made 1" knockouts — ideal for
terminating 1" conduit in concrete block or pre-formed
poured concrete walls!
Ideal for concrete/masonry walls in:
• Schools
• Shopping centers
• Medical complexes
• Small office buildings
• Other light commercial construction
requiring extra wiring capacity
• The first factory-made 1" KO masonry box available
• 1" knockouts support larger conduit for extra wiring
capacity
• Saves time and labor by eliminating the need
to modify standard boxes to fit 1" conduit
• Stable, welded steel, single-piece masonry design
for heavy-duty applications
• Steel City quality — won’t deform after installation
• KOs on top, back and bottom for flexible conduit
installation
®
Listed
• UL
1" KO Masonry Box
Cat. Std. Pkg. UPC
Number Description Knockouts Qty. Number
GW-135-NG-1 1" KO Single-Gang Masonry Box, (4) 1" (1 top, 1 bottom, 2 end) 20 785991-04449
31⁄2"D x 33⁄4"H (non-gangable) (4) 1⁄2"&3⁄4" eccentric (2 each side)
www.tnb.com
Please ask your Thomas & Betts sales representative for a complete catalog
of quality Thomas & Betts electrical products or visit us at www.tnb.com.
For customer service, call 1-800-816-7809. For technical questions, call 1-888-862-3289.
© 2006 Thomas & Betts Corporation. All rights reserved. Printed in the U.S.A. 10/06/20M GM-1137
Thomas & Betts Corporation
Electrical Division
8155 T&B Boulevard
Memphis, TN 38125
901-252-5000
Thomas & Betts Ltd.
700 Thomas Avenue
Iberville, Québec J2X 2M9
450-347-5318