Care to supply a code reference?
Second last paragraph of 10-700 in Appendix B may be of interest to you.
Maybe you have code amendments on these in British California?
Uhhh code 10-700 through 10-708? It's the lack of a code like 10-614(6) that is my argument.
Couldn't find anything for BC, got: "Rules 10-702 to 10-708 serve as a guideline for bonding non-electrical equipment to ground. To protect against loss of bonding, approved lugs are required for a positive connection. Due to the possibility of damage, a bonding conductor no smaller than No. 6 American Wire Gauge (AWG) copper or No. 4 AWG aluminum should be used." for Alberta.
Again, wording very bad. Look at these wires connected to things waves hands
. Ok... what are those wires connected to?
Second last paragraph in a informative(non-mandatory)section of the code book... meaning it's not code and not enforceable. But sure, only have my 2018 on me(and CSA digital at that
Paragraphs are sometimes difficult to identify. Like is this part of the livestock stuff? But then computer floor...). Second last paragraph:
"Conductive materials used for equipotential bonding need not be wires and can take the form of structural steel, bus, metallic framing and support structures, conductive static mats, or the support structure of a computer room floor. Each of these materials, when adequately interconnected, form and effective equipotential plane."
"when adequately interconnected" is wonderfully grey. Got some engineering papers to clear that up Joe?
That's the crux I guess. I run a #6 from my grounding bus to a clamp on the pipe, there is no question, it's good. Clamp a #6 to the pipe then like screw a lug to some structural steel. Ok now break out your megger and prove it's good enough.
In my searching I did see some bonding of the flexible lines... they just kinda put a clamp on close to the connection and just, what looks like 10 or 12, again... connect it to... something.
Gregory Havel discusses the fireground implications of the use of corrugated stainless-steel tubing jacketed with yellow PVC or polyethylene as piping for natural and LP gas.