Redsy,
While the bonding suggested in the FPN will provide some additional safety, if the fault is directly to the ductwork, the fault return path may not be able to carry enough current to open the OCPD. If the OCPD does not open, there would be voltage between the duct and ground". However, if the compressor unit was properly grounded, why didn't the required EGC at the unit itself clear the fault? The grounding suggested in the FPN should not have been required to prevent this accident. The code required EGC should have prevented this tragic accident.
DoN(resqcapt19)
[This message has been edited by resqcapt19 (edited 05-08-2002).]
