Direct bonding of VectorFlex CSST is required for all gas-piping systems incorporating a VectorFlex gas line system whether the connected gas equipment is electrically powered or not. Direct bonding is included as part of the manufacturer’s requirements for both single family and multi-family building. A person knowledgeable in electrical system design, the local electrical code and these requirements should specify the bonding for commercial applications.
[Fig. 4.59]
A bonding jumper is permanently and directly connected to the electrical service grounding system. This can be achieved through a connection to the electrical service equipment enclosure, the grounded conductor at the electrical service, the grounding electrode conductor (where of sufficient size) or to the one or more grounding electrodes used.
[Fig. 4.34]
The bonding is not smaller than a 6 AWG copper wire or equivalent. The bonding conductor is installed and protected in accordance with the National Electrical Code, NFPA 70, (NEC) and Canadian Electrical Code (CEC) CSA C22.1
The bonding conductor is attached in an approved manner in accordance with NEC/CEC and the point of attachment for the bonding conductor is accessible.
Bonding/grounding clamp used is listed to UL 467 or other acceptable national standards.
The bonding clamp is attached at one point within the piping system to a segment of rigid pipe or a pipe component such as a nipple, fittings or manifold. See Fig 1 and 2 for guidance. The corrugated stainless steel tubing portion of the gas piping system shall not be used as the point of attachment of the bonding clamp at any location along its length. The bonding clamp is attached such that metal to metal contact is achieved with the pipe component.
A VectorFlex gas line should not be directly supported on or by other electrically conductive systems including copper water pipe, electric power cables, air conditioning and heating ducts, communications cable and structural steel beams.