I should really use the search feature before posting. It looks like I do need to run a #6.
"CSST Bonding – What is Required?
There is confusion on what is going on with CSST,
flexible gas piping, since the manufacturers have been
sending out revised installation instructions with their
material. The revisions were a result of a lawsuit in which
the court stated that the manufacturers must provide a
means to protect the CSST from lightning. The revised
instructions are requiring that the CSST be bonded to the
grounding electrode conductor.
The installation instruction requirements are not
in compliance with the currently adopted codes. The code
requires that CSST be bonded, not grounded or used as a
grounding electrode. Section 250.104(B) of the 2005
National Electrical Code (NEC) states that the equipment
grounding conductor is permitted to serve as the bonding
means for the gas piping. Otherwise, bonding is required
to be from the CSST connector coupling to the water piping.
The size of the bonding conductor is based on the rating
of the circuit likely to energize the piping system. Table
250.122 in the 2005 NEC provides the conductor size
based on the ampacity of the circuit. For example, if there
is a gas heater with no electric at all to it and the service to
the dwelling is 200 amperes, Table 250.122 states that 6
AWG copper or 4 AWG aluminum is required for the
bonding conductor.
The clamps installed on the water and CSST pipes
must be listed and labeled in accordance with Section 250.8
of the 2005 NEC. The clamps may be a dissimilar metal,
provided they are approved and listed for the use.
In conclusion, no additional bonding is required
where there is electric to any gas appliance, since Section
250.104(B) of the 2005 NEC permits the equipment
grounding conductor to serve as the bonding means for a"(gas piping system.
Discuss?
