Installation Manual
BI 7.2.3-44
June 2018, Rev 4
9
Single Romex:
-3/4" EMT QBox Conduit Nipple
-3/4" EMT to 3/4" NPT threaded coupler (Arlington PN 2411)
-3/4” to 1/2” Reducing Bushing (Halex #91321)
-1/2” Knockout NM tting (Halex #20511)
-Single NM Wire
Typical Hardware:
With the 3/4" EMT to 3/4" NPT
threaded coupler (Arlington PN
2411), typical 3/4" knockout
ttings can be used. With the
addition of the 3/4” to 1/2”
Reducing Bushing (Halex #91321),
1/2" knockout ttings can be
used.
Transition to building wiring: If you are using the attic exit, several inches of 3/4" EMT QBox conduit nipple will be visible in
the attic. A number of options exist to transition from the 3/4" EMT QBox conduit nipple to the building wiring. By using a
3/4" EMT to Rigid threaded coupler, as well as a 3/4" to 1/2" threaded reducer, many standard 3/4" and 1/2" knockout ttings
can be be utilized to transition to NM, MC, Flex, etc. The following are some possible congurations. Part numbers are given
for reference purposes only. All ttings must be listed for the use, and the installation must meet all NEC guidelines.
ITEMDESCRIPTION
SUPPORTED
WIRETYPES
HOME DEPOT
Brand / Part #
ARLINGTON
PART
NUMBER
BRIDGEPORT
PART
NUMBER
3/4"EMTto3/4"RigidCoupler N/A N/A 2411 N/A
3/4"EMTto1/2"RigidCoupler N/A N/A 2410 N/A
3/4"to1/2"ReducingBushing N/A HALEX/91321 522 1161
3/8"(1/2"KO)SingleNM NM HALEX/20511 841 651-DC2
3/4"SingleNM NM HALEX /20512 842 670-DC2
3/8"(1/2"KO) Single MC NM/MC/AC/FMC HALEX /20670 SG38 570-DC2
3/4"SingleMC MC/AC/FMC N/A SG75 572-DC2
3/8"(1/2"KO) Duplex NM/MC/AC/FMC HALEX/21580 846 601-DC2
3/4"Duplex NM/MC/AC/FMC N/A N/A 621-DC2
1/2"FMC FMC HALEX /20440 GF-50 520-DC2
3/4"FMC FMC HALEX /20442 GF-75 521-DC2
1/2"Liquid-tight LT RACO/3402-8 LT50 430-LT2
3/4"Liquid-tight LT RACO/3403-8 LT75 431-LT2
3/4"EMTto3/4"EMTCoupler N/A HALEX/26282 811 241
Table for reference purposes only. Installer must verify appropriate cable type/gauge for application.
Single MC:
-3/4” EMT QBox Conduit Nipple
-3/4” EMT to 3/4” NPT threaded coupler (Arlington #2411)
-3/4” to 1/2” Reducing Bushing (Halex #91321)
-1/2” Knockout MC tting (Halex #20670)
-Single MC cable
3/4" EMT:
-3/4” EMT QBox Conduit Nipple
-3/4” EMT to 3/4” EMT coupler (HALEX # 26282)
-3/4” EMT
3/4” Flexible Metal Conduit:
-3/4” EMT QBox Conduit Nipple
-3/4” EMT to 3/4” NPT threaded coupler (Arlington #2411)
-3/4” Knockout Flex tting (Halex #20442)
-3/4” Flexible Metal Conduit
Double MC:
-3/4” EMT QBox Conduit Nipple
-3/4” EMT to 3/4” NPT threaded coupler (Arlington #2411)
-3/4” to 1/2” Reducing Bushing (Halex #91321)
-1/2” Knockout duplex tting (Halex #21580)
-Double MC
3/4" Liquid Tight:
-3/4” EMT QBox Conduit Nipple
-3/4” EMT to 3/4” NPT threaded coupler (Arlington #2411)
-3/4” Knockout Liquid Tight tting (Raco #3403-8)
-3/4” Liquid Tight Conduit
Double Romex:
-3/4” EMT QBox Conduit Nipple
-3/4” EMT to 3/4” NPT threaded coupler (Arlington #2411)
-3/4” to 1/2” Reducing Bushing (Halex #91321)
-1/2” Knockout NM tting (Halex #20511)
-Double NM Wire