why does reg. 543.2.3 prohibit the use of a gas pipe as a protective conductor? After all it can be main bonded and then carry substantial currents under certain conditions.
I was thinking of diverted neutrals causing largish currents to flow in copper gas pipes as an example.
Is there an explosion risk with 20, 30, 40 or 50 Amps flowing. Will the pipe get so hot that fittings start to leak gas due to softened solder at fittings?
Will the gas explode inside the pipe if it gets very hot or is there insufficient heat and lack or air to prevent an explosion?
Will diverted neutral current be limited in magnitude by the new artificial (perhaps high impedance) "Ra" caused by a lost neutral, when load currents try to travel down copper gas pipes or water pipes to earth?
Or is the perceived gas explosion risk just a loose assumption and not a proven risk?
I was thinking of diverted neutrals causing largish currents to flow in copper gas pipes as an example.
Is there an explosion risk with 20, 30, 40 or 50 Amps flowing. Will the pipe get so hot that fittings start to leak gas due to softened solder at fittings?
Will the gas explode inside the pipe if it gets very hot or is there insufficient heat and lack or air to prevent an explosion?
Will diverted neutral current be limited in magnitude by the new artificial (perhaps high impedance) "Ra" caused by a lost neutral, when load currents try to travel down copper gas pipes or water pipes to earth?
Or is the perceived gas explosion risk just a loose assumption and not a proven risk?
