Operating Guide

United States
Tel: [phone]
800.816.7809
Fax: [phone]
Technical Services
Tel: [phone]
www.tnb.comwww.tnb.com
United States
Tel: [phone]
800.816.7809
Fax: [phone]
Technical Services
Tel: [phone]
36
Connectors & Grounding — Blackburn
®
Grounding Systems
Ground Clamps
CAT. NO. CONDUIT SIZE WATER PIPE SIZE
CONDUCTOR RANGE DIMENSIONS (IN.)
MAX. MIN. A B C D E G
JP-12
1
⁄2
1
⁄2"–1" #6 sol. #10 sol. 2
3
⁄4 2
11
⁄32
23
⁄32 1
9
⁄64 1 2
1
⁄2
JP-212
1
⁄2 1
1
⁄4"–2" #6 sol. #10 sol. 3
3
⁄4 3
1
⁄2
13
⁄16 1
9
⁄64 1 2
1
⁄2
JP-212412
1
⁄2 2
1
⁄2"–4" #6 sol. #10 sol. 6 6
5
⁄16 1 1
9
⁄64 1 2
1
⁄2
JP-34
3
⁄4
1
⁄2"–1" #2/0 str. #10 sol. 2
3
⁄4 2
11
⁄32
23
⁄32 2
5
⁄16 1
1
⁄4 2
3
⁄16
JP-234
3
⁄4 1
1
⁄4"–2" #2/0 str. #10 sol. 3
3
⁄4 3
1
⁄2
13
⁄16 2
5
⁄16 1
1
⁄4 2
3
⁄16
JP-212434
3
⁄4 2
1
⁄2"–4" #2/0 str. #10 sol. 6 6
5
⁄16 1 2
5
⁄16 1
1
⁄4 2
3
⁄16
JP-1 1
1
⁄2"–1" #3/0 str. #10 sol. 2
3
⁄4 2
11
⁄32
23
⁄32 2
5
⁄16 1
1
⁄2 2
3
⁄8
JP-21 1 1
1
⁄4"–2" #3/0 str. #10 sol. 3
3
⁄4 3
1
⁄2
13
⁄16 2
5
⁄16 1
1
⁄2 2
3
⁄8
JP-21241 1 2
1
⁄2"–4" #3/0 str. #10 sol. 6 6
5
⁄16 1 2
5
⁄16 1
1
⁄2 2
3
⁄8
Add suffix C to Cat. No. to specify plating.
CAT. NO. WATER PIPE SIZE
CONDUCTOR RANGE DIMENSIONS (IN.)
MAX. MIN. A B C D E G
JA
1
⁄2"–1" #6 sol. #10 sol. 2
3
⁄4 2
11
⁄32
25
⁄32 2
9
⁄32
15
⁄32 1
3
⁄8
JA-2 1
1
⁄4"–2" #6 sol. #10 sol. 3
3
⁄4 3
1
⁄2
13
⁄16 2
9
⁄32
15
⁄32 1
3
⁄8
JA-2124 2
1
⁄2"–4" #6 sol. #10 sol. 6 6
5
⁄16 1 2
9
⁄32
15
⁄32 1
3
⁄8
Add suffix C to Cat. No. to specify plating.
C
B
D G
E
A
(MAX.)
C
G E
D
B
A
For connecting
armored cable
to water pipe.
Cast Bronze Clamp
• Clamping portion similar
to standard “J” clamp
• Special pressure bar grips
armor or outer cable insulation
to reduce chance of grounding
conductor being pulled out
• Furnished with zinc-plated screws
For grounding rigid
conduit systems.
Cast Bronze Clamps for Conduit
• Continuity from rigid conduit system to
ground provided by cast bronze threaded
conduit hub
• Hub swings 360° for easy alignment
• Heavy brass washer protects
clamped grounding conductor
• Furnished with zinc-plated screws
• Cast bronze pipe clamping portion
identical to that used in “JA” clamp
1211_1836_TNB_TNB_Power Connection & Control Cat31_r7.indd 36 2/24/14 3:27 PM