Grounding and Bonding 200 amp service panel

[trentw7231]

Hello,

Scenario: A 200 amp distribution panel is grounded to a ground rod. The gas piping is grounded to a ground rod. The water supply line was re-piped from the municipal main shutoff to the meter with pex and downstream from the meter about 10 feet until it connects to copper again. One foot after the pex/copper connection downstream from the meter is a bonding wire going to the panel. The bonding is not effective ( we all agree?) The home uses a combination of pex and copper (mostly copper).

Questions: If the water line is not longer bonded to the panel, what would the correction be? Or does it need corrected? Also, would a bond between the gas line and copper provide zero electrical potential? Or, does a grounding wire need to be installed from the copper line?

Advice needed..

[Jim Katen]

Hello,

Scenario: A 200 amp distribution panel is grounded to a ground rod. The gas piping is grounded to a ground rod.

Not quite correct. The gas piping is bonded to the ground rod.

The water supply line was re-piped from the municipal main shutoff to the meter with pex and downstream from the meter about 10 feet until it connects to copper again. One foot after the pex/copper connection downstream from the meter is a bonding wire going to the panel. The bonding is not effective ( we all agree?)

I don't agree. Why wouldn't it be effective?

The home uses a combination of pex and copper (mostly copper).

Questions: If the water line is not longer bonded to the panel, what would the correction be? Or does it need corrected?

If the water piping *system* is metal (most of the water pipes are metal), they should be bonded to the grounding electrode system. If parts of the metal water piping system are isolation from each other with plastic pipe, jumpers should be used to join them.

Also, would a bond between the gas line and copper provide zero electrical potential? Or, does a grounding wire need to be installed from the copper line?

Advice needed..

Since the water piping system is not in contact with the earth for 10 feet, it's not going to be part of the grounding electrode system. Those pipes only need to be bonded.

Gas pipes are never part of the grounding electrode system. They only need to be bonded. At the very least, this can be achieved by connecting them to the equipment grounding conductor of the appliance that's likely to energize them - usually the furnace.