Ground Clamps
Connectors & Grounding — Blackburn® Grounding Systems
Ground Clamps Water Pipe Ground Clamps
Cat. No.
Ground Wire Size
2-TB 3-TB 4 5-TB 6
Water Pipe Size
#6, #4, #2 #6, #4, #2 #6, #4, #2 #6, #4, #2 #6, #4, #2
⁄2", 3⁄4", 1" or rebar 4-10 11⁄4", 11⁄2" or 2" 21⁄2", 3" or 31⁄2" 4", 41⁄2" or 5" 6"
1
Malleable iron. #6 – #2 AWG ground wire.
Water Pipe Ground Clamps
Cat. No.
Ground Wire Size
Water Pipe Size
Cat. No.
Ground Wire Size
Water Pipe Size
3902 3903 3904 3905-TB 3906-TB 3907 3908 3909-TB
#4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG
1 ⁄2"–1" 11⁄4"–2" 21⁄2"–31⁄2" 4"–5" 6" 8" 10" 12"
3902BU* 3903BU* 3904BU* 3905BU* 3906BU* 3907BU* 3908BU* 3909BU*
#4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG
1 ⁄2"–1" 11⁄4"–2" 21⁄2"–31⁄2" 4"–5" 6" 8" 10" 12"
* UL Listed for direct burial
For connecting grounding conductor to either steel or copper pipe, rod or tubing.
B
A
Aluminum Water Pipe Clamp
Type AJ2
• For use with copper or aluminum conductor • Tin plated for corrosion resistance
C
B
A Type AJ C
conductor range
dimensions (in.)
Cat. No.
water pipe Size
max.
min.
A
B
AJ AJ-2 AJ-2124
⁄2–1 11⁄2–2 21⁄2–4
1/0 Str. 250 kcmil 250 kcmil
#14 Sol. #6 #6
21⁄2 37⁄8 59⁄16
21⁄4 33⁄4 65⁄16
1
C
steel clamp Screw
⁄8 7 ⁄8 7 ⁄8
⁄4–20 5 ⁄16–18 3 ⁄8–16
5
1
UL Listed for both copper and aluminum conductors to steel pipe and copper water tubing
32
United States Tel: 901.252.8000 800.816.7809 Fax: 901.252.1354
Technical Services Tel: 888.862.3289
www.tnb.com
aluminum wire Screw 7 ⁄16–20 slot ⁄16–20 socket 11 ⁄16–20 socket 11
Ground Clamps Water Pipe Ground Clamps
Cat. No.
Ground Wire Size
2-TB 3-TB 4 5-TB 6
Water Pipe Size
#6, #4, #2 #6, #4, #2 #6, #4, #2 #6, #4, #2 #6, #4, #2
⁄2", 3⁄4", 1" or rebar 4-10 11⁄4", 11⁄2" or 2" 21⁄2", 3" or 31⁄2" 4", 41⁄2" or 5" 6"
1
Malleable iron. #6 – #2 AWG ground wire.
Water Pipe Ground Clamps
Cat. No.
Ground Wire Size
Water Pipe Size
Cat. No.
Ground Wire Size
Water Pipe Size
3902 3903 3904 3905-TB 3906-TB 3907 3908 3909-TB
#4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG
1 ⁄2"–1" 11⁄4"–2" 21⁄2"–31⁄2" 4"–5" 6" 8" 10" 12"
3902BU* 3903BU* 3904BU* 3905BU* 3906BU* 3907BU* 3908BU* 3909BU*
#4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG #4–4/0 AWG
1 ⁄2"–1" 11⁄4"–2" 21⁄2"–31⁄2" 4"–5" 6" 8" 10" 12"
* UL Listed for direct burial
For connecting grounding conductor to either steel or copper pipe, rod or tubing.
B
A
Aluminum Water Pipe Clamp
Type AJ2
• For use with copper or aluminum conductor • Tin plated for corrosion resistance
C
B
A Type AJ C
conductor range
dimensions (in.)
Cat. No.
water pipe Size
max.
min.
A
B
AJ AJ-2 AJ-2124
⁄2–1 11⁄2–2 21⁄2–4
1/0 Str. 250 kcmil 250 kcmil
#14 Sol. #6 #6
21⁄2 37⁄8 59⁄16
21⁄4 33⁄4 65⁄16
1
C
steel clamp Screw
⁄8 7 ⁄8 7 ⁄8
⁄4–20 5 ⁄16–18 3 ⁄8–16
5
1
UL Listed for both copper and aluminum conductors to steel pipe and copper water tubing
32
United States Tel: 901.252.8000 800.816.7809 Fax: 901.252.1354
Technical Services Tel: 888.862.3289
www.tnb.com
aluminum wire Screw 7 ⁄16–20 slot ⁄16–20 socket 11 ⁄16–20 socket 11
