Cut Sheet

Rigid and Intermediate Metal Conduit Fittings
A-7
United States
Tel: [phone]
800.816.7809
Fax: [phone]
Technical Services
Tel: [phone]
www.tnb.com
WIRE
RANGE
CONDUIT BUSHING THROAT LUG SWING BUSHING AWG
CAT. NO. SIZE DIA. DIA. LENGTH RADIUS HEIGHT CU/AL
3870-TB
1
⁄2" 1.125 .560 1.310 1.212 .657 14-4
3861
1
⁄2" 1.125 .560 1.675 1.402 .657 8-2/0
3871-TB
3
⁄4" 1.420 .742 1.310 1.360 .660 14-4
3862
3
⁄4" 1.420 .742 1.675 1.550 .660 8-2/0
3872 1" 1.770 .944 1.310 1.535 .735 14-4
3882 1" 1.770 .944 1.675 1.725 .735 8-2/0
3873 1
1
⁄4" 2.190 1.242 1.310 1.745 .735 14-4
3883 1
1
⁄4" 2.190 1.242 1.675 1.935 .735 8-2/0
3874 1
1
⁄2" 2.468 1.449 1.310 1.884 .770 14-4
3884 1
1
⁄2" 2.468 1.449 1.675 2.074 .770 8-2/0
3875 2" 3.031 1.860 1.310 2.165 .770 14-4
3889 2" 3.031 1.860 1.675 2.355 .770 8-2/0
3876 2
1
⁄2" 3.516 2.222 1.310 2.408 .940 14-4
3886 2
1
⁄2" 3.516 2.222 1.675 2.598 .940 8-2/0
3993 2
1
⁄2" 3.516 2.222 2.230 2.928 .940 6-4/0
3877 3" 4.234 2.761 1.310 2.767 .975 14-4
3887 3" 4.234 2.761 1.675 2.957 .975 8-2/0
3994 3" 4.234 2.761 2.230 3.287 .975 6-4/0
3878 3
1
⁄2" 4.781 3.193 1.310 3.040 .975 14-4
3863 3
1
⁄2" 4.781 3.193 1.675 3.230 .975 8-2/0
3995 3
1
⁄2" 4.781 3.193 2.230 3.560 .975 6-4/0
3879 4" 5.328 3.623 1.310 3.314 .980 14-4
3864 4" 5.328 3.623 1.675 3.504 .980 8-2/0
3996 4" 5.328 3.623 2.230 3.834 .980 6-4/0
3880 5" 6.328 4.542 1.310 3.814 .985 14-4
3865 5" 6.328 4.542 1.675 4.000 .985 8-2/0
3998 5" 6.328 4.542 2.230 4.334 .985 6-4/0
3881 6" 7.406 5.458 1.310 4.353 1.200 14-4
3866 6" 7.406 5.458 1.675 4.543 1.200 8-2/0
3999 6" 7.406 5.458 2.230 4.875 1.200 6-4/0
Temperature rating 150° C
Meets Coast Guard Regulation CG293
Available with DURA-PLATE
®
Finish.
Application
• For quick installation of bonding jumper
to multiple metal conduits (Rigid and IMC)
• Designed to bush conductors and prevent
insulation damage
Features
• Ease of installation, lay in lug design
• Cast malleable iron body designed to lock insulator
in place within body, reducing common assembly
problem resulting in dislodging of insulator
• Insulator rated for 150° C/302° F application
• Look for the unique T&B blue color, ensuring
the highest quality fitting
Standard Material/Finish
Body: Electro zinc plated
Lay-In Lug: Aluminum/tin plated
Insulator: Thermoplastic 150° C/302° F
Application with 94V-0 flammability
Wire Clamping Screw
Insulator
Set Screw (1)
3870 Series
Lay-In Lug
Bushing
Casting
Threaded Insulated Grounding Bushing