Bonding gas line

[LarryFine]

How do you mean?

You should never add an electrode that is not securely connected to the existing ones.

To do so can cause currents from lightning-induced voltage gradients between them.

We bond the incoming gas line is to assure it's at the same potential as the appliances.

 

[FionaZuppa]

You should never add an electrode that is not securely connected to the existing ones.

To do so can increase lightning-induced currents from voltage gradients between them.

Lightning strike nearby, vs house strike.

Nearby and gradients, the volts gradient between, also would apply to say my GEC that is not tied directly to my neighbors house GEC that is just 15ft away. That does not seem to be an issue for any building code or NEC.

 

[LarryFine]

Nearby and gradients, the volts gradient between, also would apply to say my GEC that is not tied directly to my neighbors house GEC that is just 15ft away. That does not seem to be an issue for any building code or NEC.

But they are tied together, through the utility neutral, if not a metallic water supply.

 

[FionaZuppa]

But they are tied together, through the utility neutral, if not a metallic water supply.

Not always. My neighbor connects to a CT x-frmr from a different poco phase. Is that the same neutral in the ground?

 

[LarryFine]

Not always. My neighbor connects to a CT x-frmr from a different poco phase. Is that the same neutral in the ground?

Absolutely. It's like a 3ph wye-secondary where the transformers happen to be on different poles.

All POCO transformer primaries and secondaries share the same multi-grounded neutral conductor.

 

[FionaZuppa]

Absolutely. It's like a 3ph wye-secondary where the transformers happen to be on different poles.

All POCO transformer primaries and secondaries share the same multi-grounded neutral conductor.

Single phase xfmrs, one each on a different poco phase, will have their primary and secondary having a phase diff between the two, and the CT (the neutral jabbed into earth) also has a phase diff between the two CT's. So isnt there a votage gradient between the two CT's (via earth)?

 

[don_resqcapt19]

Single phase xfmrs, one each on a different poco phase, will have their primary and secondary having a phase diff between the two, and the CT (the neutral jabbed into earth) also has a phase diff between the two CT's. So isnt there a votage gradient between the two CT's (via earth)?

A common conductor ties that all together...if the transformers are line to neutral on the primary, the utility uses a single conductor for both the primary and secondary neutrals. If the transformers are line to line, the secondary neutral is tied to the static line run above the primary conductors on the poles, and there will be a grounding electrode at each pole that has a transformer, and every 1200' along the run, if there are no transformers.