Installation Guide
32
Installation Practices
HOME-FLEX® is installed. Electrical work must be performed by a qualied person recognized
by the local jurisdictional authority as being capable of performing such work. All installa-
tions of CSST for use in natural and propane (LP) gas piping systems in single and multi-family
structures, whether or not the connected gas equipment is electrically powered, require
direct bonding. Bonding of commercial systems are to be designed by qualied persons
according to the local electrical code.
HOME-FLEX® CSST installations inside or attached to building exteriors are to be electrically
continuous and direct bonded to an eective ground-fault current path. Direct bonding of
gas piping systems is achieved when the following guidelines are met:
• Direct and permanent connection of a bonding jumper to the electrical service
grounding system by connecting to the: electrical service equipment enclosure,
the grounding electrode conductor (if of sucient size), the grounded conductor
at the electrical service, or to one or more grounding electrodes. The piping sys-
tem shall not be used as a grounding electrode for an electrical system.
• A single bond connection near the gas service entrance of the building (or down-
stream of the gas meter of each housing unit in a multi-family structure) to the
structure’s gas piping downstream of the utility meter, or the second stage regu-
lator for LP systems. Bonding connections are not to be made to underground
natural gas utility service lines or supply lines from LP tanks.
• Bonding/grounding clamp specications: conductors are to be no smaller than 6
AWG. Bonding clamps are to be listed to UL 467, and be attached in accordance
with the National Electric Code (NEC) and the listing of the clamp. The attachment
point for the bonding conductor is to be accessible. This bond is in addition to any
bonding requirements as specied by local codes.
• Attachment between the CSST gas piping system and the bonding clamp must be
made by connecting to a HOME-FLEX® brass tting (Figure 4.27), or any rigid pipe
between the rst CSST tting in the system and the meter (Figure 4.28). Under no
circumstance is HOME-FLEX® CSST tubing to be used as the attachment point for
the bonding conductor.
Black Iron Tee
Bonding Clamp (UL 467)
Heavy Gauge Bonding Wire (minimum 6 AWG)
Note: Remove any paint on pipe
surface under bonding clamp
Figure 4.27 Bonding Connection to Brass Fitting
Brass HOME-FLEX® Fitting
Figure 4.28 Bonding Connection to Rigid Black Iron Pipe
Black Iron Pipe Component
Heavy Gauge Bonding Wire
(minimum 6 AWG)
Note: Remove any paint on pipe surface under bonding clamp
Bonding Clamp (UL 467)