Operating Guide

United States
Tel: [phone]
800.816.7809
Fax: [phone]
Technical Services
Tel: [phone]
www.tnb.com
www.tnb.com
United States
Tel: [phone]
800.816.7809
Fax: [phone]
Technical Services
Tel: [phone]
37
Connectors & Grounding — Blackburn
®
Grounding Systems
Ground Clamps
CAT. NO. CONDUIT SIZE PIPE SIZE
CONDUCTOR RANGE
MAX. MIN.
JPT
1
⁄2" or
3
⁄4" EMT
1
⁄2" Rigid
1
⁄2" to 1"
#6 Sol. #10 Sol.JPT2 1
1
⁄4" to 2"
JPT4 2
1
⁄2" to 4"
CAT. NO. GROUND WIRE SIZE AWG CONDUIT SIZE
3930 #8 to #2
1
⁄2" Conduit
3940 #8 to #2
3
⁄4" Conduit
3950 #8 to 3/0 1" Conduit
3951 #8 to 4/0 1
1
⁄4" Conduit
Material: Malleable iron
Conduit Hubs
CAT. NO. CONDUIT SIZE (IN.)
CONDUCTOR RANGE
MAX. MIN.
CH12
1
⁄2 #6 Sol. #10 Sol.
CH34
3
⁄4 2/0 Str. #10 Sol.
CH1BB 1 3/0 Str. #10 Sol.
Hub swings 360° for ease of alignment.
Type JPT — Cast Bronze Clamps for Conduit
• Pipe clamping portion identical to “JA” clamp
• Pressure-bar type conduit hub adjusts to fit
1
⁄2" or
3
⁄4" EMT
or
1
⁄2" rigid conduit
• Brass washer provides positive contact with grounding conductor
• Furnished with zinc-plated screws
Provides positive connection between
rigid conduit and water system.
Type CH — Bronze Conduit Hubs
• Used in conjunction with “J” clamp
• Rugged cast-bronze threaded hub
1211_1836_TNB_TNB_Power Connection & Control Cat31_r7.indd 37 2/24/14 3:27 PM