The year 2020 provided me with the unique opportunity and the time to produce a series of videos on topics that you told me were of interest to you. I recorded them from my house, and livestreamed them over the course of several months. There were a lot of you that might not have been able to tune in, and others who did, but would enjoy the chance to see them again. We'll be sending them out monthly in a newsletter series. Enjoy and feel free to share!
 Normally noncurrent-carrying electrically conductive materials that are likely to become energized, such as metal gas piping must be connected (bonded) in accordance with 250.104 to the supply source via an effective ground-fault current path [250.4(A)(4)]. According to the NFPA style manual “Likely to Become Energized” means that an electrical conductor is present in some capacity. For example, an insulation failure in an electrical circuit of a gas range could energize the metal gas piping.
Metal gas piping systems in or attached to a building must be bonded. The metal gas piping is considered bonded when it’s connected to an appliance that is connected to the circuit equipment grounding conductor [250.104(B)]. The use of an additional bonding jumper is not necessary to comply with 250.104(B) and this requirement does not conflict with 250.52(B)(1) which prohibits the gas piping to be used as a grounding electrode. However, many AHJ’s throughout the country enforce the metal gas piping to be bonded with an additional bonding jumper in accordance with the International Fuel Gas Code or the National Fuel Gas Code.
Let’s examine 250.104(B) informational note 2 that talks about additional bonding requirements for gas piping in accordance with NFPA 54 National Fuel Gas Code. Section 7.12 of the NFPA 54 National Fuel Gas Code states gas piping systems must be bonded to the grounded service conductor, the grounding electrode conductor, or the grounding electrode with a 6 AWG copper conductor not longer than 75 feet. The bonding connection must be made with a listed fitting and must be accessible. This is not an NEC requirement!
Join Mike as he covers the NEC gas pipe bonding requirements and what to do in real world applications where other than NEC requirements are involved in bonding metal gas piping.
Click here or on the image to watch the video [12min:15sec].
|
|
|
|
