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128B
XD EXPANSION/DEFLECTION COUPLING
APPLICATION:
XD Expansion/Deection couplings are used with threaded Rigid Metal Conduit or EMT to couple together (2) sections of
conduit and protect conduit wiring systems from damage due to any movement: expansion, contraction, angular or parallel
deection.
XD Expansion/Deection couplings are UL Listed (UL 514B) and CSA Certied (CSA C22.2 No.18.3) suitable for wet location and provide an effective grounding means for use indoors and outdoors without an external bonding jumper. They meet
the requirements of Article 250.98 of the NEC, providing an electrically continuous raceway, requiring no additional bonding
means.
XD Expansion/Deection couplings accommodate axial expansion or contraction up to ¾”, parallel deection up to ¾” and
angular deection up to 30˚ in any direction of the coupled conduit runs. This results in protection of conduit wiring systems
from damage due to any such movement.
The integral (2) piece union allows connection between rigid conduit, where neither conduit can be turned, or where a conduit
run may be desired to be broken without taking down the entire run.
INSTALLATION INSTRUCTIONS:
Never perform installation on energized line.
NOTE:
When used in wet locations, apply a thin coat of electrically conductive compound (Kopr-Shield®) on the first three
internal NPT threads to enhance conductivity and protect mating surfaces.
The XD Expansion/Deflection coupling units come from the factory with the integral (2) piece union. See Fig.1.
NPT STATIONARY
CAUTION
DO NOT TWIST THE UNIT WHEN INSTALLING
TO AVOID DAMAGE TO GROUNDING STRAP.
To install the XD coupling, all NEC and local codes must
be followed by a qualified installer. Verify that ground
continuity has been established by using an Ohmmeter or
other suitable testing equipment before energizing. Failure
to properly ground the connection will create an electrical
shock hazard which can cause serious injury or death.
COUPLING END (E)
Figure 1
XD COUPLING
ASSEMBLY (D)
UNION COUPLING
END (F)
INTEGRAL
(2) PIECE
UNION
NPT UNION
COUPLING (B)
For installation where both conduits can be turned.
1. Wrench-tight Union Nut (A). See Fig. 2.
2. Thread NPT Stationary Coupling End (E) onto conduit
(#1). Finish tightening with a pipe wrench (wrench-
tight). DO NOT use Union Coupling End (F), this could
damage grounding strip.
3. With Union Nut (A) wrench-tight, complete assembly by
holding Union Coupling End (F) rmly and thread
conduit (#2) into NPT Union Coupling (B). Finish tighting
with a pipe wrench (wrench-tight) see Fig. 2.
NPT STATIONARY
COUPLING END (E)
Figure 2
CONDUIT (#1)
XD COUPLING
ASSEMBLY (D)
NPT UNION
COUPLING (B)
UNION COUPLING
END (F)
UNION
NUT(A)
CONDUIT (#2)
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For Installation where one or both conduits CANNOT be turned.
UNION
NUT(A)
CONDUIT(#2)
1. Thread NPT Stationary Coupling End (E) onto Conduit
(#1) and hand-tighten. Finish tightening with a pipe
wrench (wrench-tight). See Fig. 3. DO NOT tighten
using Union Coupling End (F).
UNION
COUPLING
2. Disassemble integral (2) Piece Union from XD Coupling
Assembly (D) by loosening and removing Union Nut (A).
See Fig. 3 and 4.
3. Take the Union Nut (A) and slide it over Conduit (#2).
See Fig. 4.
4. Then thread NPT Union Coupling (B) onto conduit (#2)
and hand-tighten. Finish tightening with a pipe wrench
(wrench-tight). See Fig. 5.
END (F)
Figure 3
INTEGRAL (2)
PIECE UNION
Figure 4
XD COUPLING
ASSEMBLY (D)
CONDUIT(#1)
NPT STATIONARY
COUPLING END (E)
5. Slide conduit (#2) sub-assembly with NPT Union
Coupling (B) into Union Coupling End (F) with Gasket
(C) placed between them, to ensure rain-tight.
See Fig. 6.
6. Slide Union Nut (A) back over and thread Union Nut
(A) into Union Coupling End (F) until it completely
seats on NPT Union Coupling (B). Finish tightening
Union Nut (A) with a wrench (wrench-tight). Final
assembly will look like Fig. 7.
XD COUPLING
ASSEMBLY (D)
UNION COUPLING END (F)
UNION
NUT(A)
NPT UNION
COUPLING (B)
Figure 7
NPT STATIONARY
COUPLING END (E)
CONDUIT(#1)
CONDUIT(#2)
Figure 6
Figure 5
XD COUPLING
ASSEMBLY (D)
CONDUIT(#2)
SUB-ASSEMBLY
WITH NPT UNION
COUPLING (B)
UNION
NUT(A)
NPT UNION
COUPLING(B)
UNION COUPLING END (F)
GASKET(C)
UNION
NUT(A)
WARRANTY: Thomas & Betts sells this product with the understanding that the user will perform all necessary tests to determine the suitability of this product for the
user’s intended application. Thomas & Betts warrants that this product will be free from defects in materials and workmanship for a period of two (2) years following the date of purchase. Upon prompt notication of any warranted defect, Thomas & Betts will, at its option, repair or replace the defective product or refund the
purchase price. Proof of purchase is required. Misuse or unauthorized modication of the product voids all warranties.
Limitations and Exclusions: THE ABOVE WARRANTY IS THE SOLE WARRANTY CONCERNING THIS PRODUCT, AND IS IN LIEU OF ALL OTHER WARRANTIES
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
WHICH ARE SPECIFICALLY DISCLAIMED. LIABILITY FOR BREACH OF THE ABOVE WARRANTY IS LIMITED TO COST OF REPAIR OR REPLACEMENT OF
THE PRODUCT, AND UNDER NO CIRCUMSTANCES WILL THOMAS & BETTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
DAMAGES.
Thomas & Betts Corporation
© 2008 Thomas & Betts. All Rights Reserved.
Memphis, TN 38125
website: www.tnb.com
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