Mike: We have looked and looked in the NEC and your Grd/Bond book but can not find these is answers. Installation: multiple PVC feeders with aluminum conductors installed within an utility tunnel with metallic pull boxes, 200A maximim apartment panel feeders, no parallel feeders, each feeder has an aluminum conductors and aluminum equipment ground conductors installed. Per code if the equipment ground is spliced with these pull/junction boxes the conductor needs to be bonded to the box. The feeder breaker sizesl; 110A, 175A and 200A.
Question One...What size copper bond connection to the box from the equipment ground wire splice?
Question Two...Splice via Cp/Al split bolt?
Question Three...What size single bond wire required to interconnect the metallic pull boxes?
Question Four...Install the metallic pull box bond conductor in conduit between the boxes or bare conductor outside the pull boxes?
Thank you for your help.
Tom
Tom Yates
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