Grounding/Bonding when main water pipe is plastic

Status
Not open for further replies.
If the interior piping system of the structure is metal then you must bond it in accordance with 250.104(A).

You muat also have a grounding electrode system as specified in 250.50.

Chris
 
Is it possible that the metallic water piping is bonded somewhere else in the house? The connection is not required to be at the water meter. I would suspect that if you find the pipe nearest to the service you may find a bonding jumper. Just a guess.
 
Rob:

I thought of this; however, the water enters a rear boiler room in the basement and none of the piping is anywhere near the main service panel. Even if this was the case, wouldn't a bonding jumper still be required across the water heater (none was present).
 
tonype said:
Rob:

I thought of this; however, the water enters a rear boiler room in the basement and none of the piping is anywhere near the main service panel. Even if this was the case, wouldn't a bonding jumper still be required across the water heater (none was present).
Click to expand...


The bonding jumper at the heater would be required here in NJ but others have opined that it is technically not required at all by the NEC.
 
It's highly unlikely, though possible, to have a metallic water system where the hot and cold were not electrically joined by valve assemblies and other fixtures.

You must still use other available electrodes, but the interior piping must still be bonded. You simply won't be using the water service as an electrode, so no 5-ft rule.

I recently re-wired an old building that was completely gutted, and all-plastic piping was installed, including the main. Two rods were the only electrodes used.
 
Grounding/Bonding when main pipe is plastic

Grounding/Bonding when main pipe is plastic

LarryFine said:
It's highly unlikely, though possible, to have a metallic water system where the hot and cold were not electrically joined by valve assemblies and other fixtures.

You must still use other available electrodes, but the interior piping must still be bonded. You simply won't be using the water service as an electrode, so no 5-ft rule.

I recently re-wired an old building that was completely gutted, and all-plastic piping was installed, including the main. Two rods were the only electrodes used.
Click to expand...

Sounds good to me. This is a typical installation here. Why install a bonding jumper across a water meter,to a insulated water pipe?
 
Status
Not open for further replies.
Top