Article 680

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vango

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Need some help getting my head around 680.26 (B) Bonded Parts:
Membership Pool has grid and all metal parts bonded and and fed to a bonding bar in equipment room.
At the bonding bar is a 3/4" ground rod driven and bonded to the bar. The bonding bar is not provided with a connection or bond to anything else (other than the direct earth) to provide a path back to the service to clear potential faults. Isnt a low impedance path back to the source crucial and/or required to efficiently clear faults?
680.26 (B) states in last part "Connections to bonded parts shall be made in accordance with 250.8. An 8 awg or larger solid copper bonding conductor provided to reduce voltage gradients in the pool area shall not be required to be extended or attached to remote panelboards, service equipment, or electrodes."
 
All metal parts need to be bonded together to provide equipotential bonding. They're not bonded together to provide a path for fault current back to the source, that's provided by the EGC. The reasoning for this is in the first sentence of 680.26(A).

680.26 Equipotential Bonding.
(A) Performance. The equipotential bonding required by this section shall be installed to reduce voltage gradients in the pool area.
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why wouldnt we connect the equipment grounding conductor to the equiopential bonding grid? and would it be a code violation if we do?
 
vango said:
why wouldnt we connect the equipment grounding conductor to the equiopential bonding grid? and would it be a code violation if we do?
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It is connected to the egc thru the housing on the motor. If the motor is a double insulated pump housing then you must connect the epb to the egc.
 
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