The new section requires that all gas lines have to be bonded straight to the grounded conductor in all homes. Grounding to SDG&E equipment may result in the discontinuation of your gas service as a safety precaution until the problem is corrected. It will now only be a bonding connection for the water line, rather than the only/primary ground. Especially if they are not protected with Bonding to ensure electrical energy is carried away from the pipe (versus carried by the pipe). This bond ensures that all portions of the system are at the same electrical potential, reducing the risk of an electrical shock.
The installation requirements for gas pipe and gas appliance connectors are very different. That means that the bonding conductor for CSST can be connected to the metallic water piping coming into the home, a ground rod at the exterior, or anywhere else on the service grounding electrode system. All manufacturers of CSST began implementing Specific Bonding Requirements as soon as 2007. These homes may, or may not have bonded gas lines. Many fire experts are confident that a lightning strike's electrical-energy can run through the electrical wiring in a house, then jump (or arc) onto CSST gas lines where it creates holes into the tubes, releasing gas & possibly creating a gas-fueled fire and / or explosion.
This standard outlines various requirements for safely installing, operating, and maintaining gas appliances. A fault is when electricity is flowing on a conductor that it should not be, such as a short circuit. Homes without updated electrical installed, for example, those that rely on knob-and-tube wiring systems or have a plethora of two-prong outlets, may not have a ground wire. Types of gas lines first. Without a ground wire, these systems come with a higher risk of shock hazards. Proper bonding and grounding will reduce the risk of damage and fire from a lightning strike. However, NFPA 54, Sec. I plan to connect the new grounding rod in the panel where the current ground wire is (as shown in the linked picture) at the feed side of the panel.
If it were water piping, it would be PEX. As you can see, there is a significant multi-year gap in which Building Codes did not require proper bonding of flexible gas lines. Due to this potential issue, by 2006, all CSST manufacturers listed bonding as an installation requirement for yellow CSST, however, based upon my experience inspecting homes, bonding this gas piping was rarely, if ever, done. CSST flexible gas piping must be bonded to reduce the risk of damage due to a lightning strike on the home. The first thing you need to learn about is the different gas lines. Now all CSST manufactures recommend that direct bonding of CSST with the house electrical system ground should be done with a 6 AWG copper wire or something equal to it. Need Help Grounding a Gas Line? For over 40 years we've been serving the central Indiana area, and we have thousands of satisfied customers to recommend us.
The current Fuel Gas Code requires CSST to be bonded anywhere along the electrical service grounding electrode system. The other end of that wire shown above went into the main electric panel. How can you know if you have CSST in your home? You can also reach out to us for a consultation and a free estimate for gas line bonding services. When there is a reason to locate where the gas pipe is (such as digging in the area), the tracer wire can be connected to a small low voltage electrical charge. If the water is supplied to the building through metal pipe, you'll also have to bond the metal supply pipe to the grounding electrode system using a properly sized bonding jumper. The same is true for flexible metal piping connected to any component containing flammable liquids or gases. Due to this uncertainty, we feel the need for a proposal for the 2002 NEC to clarify which Table to use when sizing this conductor. CSST must be installed by a qualified professional and in accordance with the Manufacturer's Design and Installation (D&I) Guide, which now expressly includes bonding and grounding of the system.
With this being said, CSST manufacturers will have to perform thorough testing on the bonding to determine whether a mass reduction could yield to damage that was caused by the CSST, in the event of a lightning strike. Let's take a closer look at the rules to help clarify the position of both Codes. You can bond CSST inside or outside. For example, Gastite says "The bonding clamp attachment point may be at any location within the gas piping system. While both CSST and FAC are made with stainless steel & carry gas — that's where their similarities end. Many homes have gas lines in their attic and buried in walls. If you have CSST in your home and gas supply line work was done there since 1990, you need to be sure it is safe. These systems let electrical currents from a fault in the wire flow safely to the ground without causing damage. Corrugated Stainless Steel Tubing (CSST) is a flexible, stainless steel pipe used to supply natural gas and propane in residential, commercial and industrial structures.
You must size this bonding jumper according to Table 250-122. Other areas rely on electricians who aren't even looking at the home's plumbing (water and gas). The main difference is a grounding wire is designed to carry current at any time necessary and carry that current into the ground. Grounding conductor, equipment: The conductor used to connect the noncurrent-carrying metal parts of equipment, raceways, and other enclosures to the system grounded conductor, grounding electrode conductor, or both; at the service equipment or the source of a separately derived system. Coated with a yellow, or in some cases, a black exterior plastic coating, CSST is usually routed beneath, through and alongside floor joists in your basement, inside interior wall cavities and on top of ceiling joists in attic spaces. The gas line adjacent to the gas meter is still often black iron but it is often either a combination of black iron and CSST inside the home. CSST started being used in the USA in the early 1990s. What does proper bonding look like? What size wire to bond gas pipe?
The diagram below shows an example of what this would look like when properly installed to today's standards. A grounding wire is, as the name implies, a wire that connects the electrical system to the ground. Expect delays in service. By bonding the lines with a copper wire, it is possible to reduce the risk of an electrical arc or spark causing damage and keep people safe. If you own a home that has CSST flexible yellow gas lines and was built prior to 2007, this fire-risk may exist in your home. Building officials aren't in the business of testing manufacturers products for safety; that's supposed to be the manufacturer's job. Check out section 250. In layman's terms, if the gas utilizing equipment the line is connected to is properly grounded, the line itself is compliant and does not need bonding. Nobody cares about any of this stuff until it concerns a house you own or you're buying, and then it's really important. You may be able (required) to use the abandoned underground copper pipe as a grounding electrode, if it meets the criteria specified in the code. Each above-ground portion of a gas piping system that is likely to become energized shall be electrically continuous and bonded to an effective ground-fault current path. Depending upon the home, accomplishing this task can range between being very easy to nearly impossible. As a gas pipe is also connected to the house by running underground, it seems logical that a gas pipe is a good place to connect a grounding wire. Underground natural gas lines are primarily polyethylene.
Grounding all isolated sections removes this hazard and provides safety for the user. Side note: I heard a rumor that the city of Maple Grove does not allow the installation of CSST. Bonding jumper: A reliable conductor to ensure the required electrical conductivity between metal parts required to electrically connect the equipment. The NEC states in Section 250. So if you have a gas water heater that has no electrical connection, then you don't have to bond the gas piping.
A) Pipe (rigid conduit of iron, steel, copper, brass, aluminum, or plastic). There is an unacceptable risk of fire from a nearby lightning strike with older systems. Here is a short timeline of the existence of CSST's: - 1990 – CSST launch in U. S. market. Recognizes under certain conditions, which applies when you are using low-voltage (50V or less) control circuits, ignition circuits, and electronic flame detection device circuits as piping or components of an electric circuit. Their testing shows bonding will largely mitigate the risk for only "indirect" lightning strikes (those that do not hit the home).
It may also lead to electrical shock injuries. That type of power surge could potentially puncture a hole in the CSST and cause a fire. The manufacturers of CSST have changed their installation requirements because they've learned that the old methods weren't good enough. 104, "any metal piping likely to become energized must be bonded to a grounding electrode system. " Introduced in the US in 1990, CSST has been installed in millions of buildings. Click the image below to see a large version of the installation tag from Gastite dated August 9, 2006. Tinned copper is more corrosion resistant than bare copper and has a longer lifespan. A lightning strike to a steel chimney cap, can extend into the house.
Metal gas piping: NEC Sec. Some manufacturers of CSST offer a product with a black outer "arc-resistant" jacket, which tells you it's an arc-resistant product. The Federal Energy Regulatory Commission (FERC) governs nearly 2. Fill out the quick form to your right and we'll be in touch very shortly.
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