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#82
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AC ground, copper-pex
On Sat, 09 Nov 2013 18:47:53 -0500, wrote:
On Sat, 09 Nov 2013 14:10:31 -0800, Oren wrote: On Sat, 09 Nov 2013 14:38:49 -0500, wrote: On Sat, 09 Nov 2013 10:47:45 -0800, Oren wrote: On Sat, 09 Nov 2013 13:26:04 -0500, wrote: I've already given the information here. What else would your highness want? Heck, I could ask you for Blueprints, but it will make you mad. Now you're acting like Malformed. \smuck What will be your next approach?! \smirk *JUST* like Malformed. "JUST" like Keith. You missed my question about your next approach. -- "Dodgeball in Burkas" -- Greg Gutfeld |
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#83
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AC ground, copper-pex
On 11/9/2013 2:56 PM, The Daring Dufas wrote:
On 10/30/2013 6:28 PM, wrote: On Wed, 30 Oct 2013 15:39:59 -0700 (PDT), wrote: Just wondering for now. Have an all copper plumbing. What happen to my ground if the pipes are replaced with PEX? Have two connections that I am aware of. One to the cold water pipe at water heater. The other one is ground rod by the meter. So, what to do to the cold water ground? It is required by code here. Does that mean that PEX is not feasible? thanks richard Drive another rod 6 feet away from the existing one and connect them together with a #6 solid copper wire. That is all you need to be legal. The ground represented by your copper pipe i the part outside underground anyway. As long as that stays copper your grounding electrode is still established. We always used #4 from the single ground rod to the panel but are you positing that #6 should be used to connect any ground rods together? You don't need larger than #6 if it is "free from exposure to physical damage". A ground rod can't sink all that much current. I seem to remember you stating that you were an electrical inspector at one time and I'd like your opinion on the new flexible gas lines being used in a lot of new construction and remodels. As I recall, it's a thin corrugated stainless steel or copper alloy which makes it bendable by hand and I'm guessing that an electrical arc such as one from a lightning strike could punch a hole through it regardless of the plastic jacket and I believe it could cause a fire. What can you tell me of code requirements, if any, about grounding gas lines? ^_^ I recently heard an electrical inspector talk about CSST. He did a lot of reading about it because manufacturers now want it grounded. The question is who does the bonding. His recommendation was for electrians not to do it, then they won't be named in the lawsuit. And if you do bond it, follow the manufacturer's instructions exactly. Manufacturers have different instructions for how they want their CSST bonded. The NEC doesn't required bonding. (The NEC does not allow gas pipe be used as an earthing electrode. Any bonding required by the NEC is done by the branch circuit ground wire at, for instance, a furnace.) As you wrote, plumbers like CSST because it is so easy to run. It is easy to run because the wall thickness is so thin, about the thickness of 2 pieces of paper. Unfortunately the gas pipe may be at the potential of the earth where the gas pipe enters the building. The electrical system can be at a very different potential during an 'event'. As you wrote, there can be an arc from the CSST to other metal. Because of the thin wall that can burn a hole in the CSST. If you are lucky the arc lights the escaping gas. There have been many fires. For example there was a class-action lawsuit filed in Arkansas that was settled in 2006. In a 2 year period in Iowa there were 200 fires linked to CSST. As a result, manufacturers now require the CSST be bonded to the electrical system. This helps, but does not eliminate the problem. There have been fires in houses where the CSST was bonded according to the manufacturer's instructions. An example was a single 'near' lightning strike (OH) where 5 houses caught fire. At least a couple were 'properly' bonded. |
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