Shortcircuit: Yes, modifications to buss cause issues with the listing. Alas, it has been 'common practice' for some time.
Dependent on having a PE/EE provide methods and materials, and a signed sealed drawing, it is acceptable in most cases.
A few jobs required the mfg to provide the materials and make the mods, and provide UL field certification. That is when $$$ is no object, as it it very costly
I went back yesterday. I had a new set of drawings that showed the correct way it was all actually installed. There were some 800 amp quick blow fuses before the tap for the PV system. So the feeder to the PV was protected. They also didn't tap the bus, but bugged the incoming wires. II have signed and certified drawings from an EE for this job.
I went back yesterday. I had a new set of drawings that showed the correct way it was all actually installed. There were some 800 amp quick blow fuses before the tap for the PV system. So the feeder to the PV was protected. They also didn't tap the bus, but bugged the incoming wires. II have signed and certified drawings from an EE for this job.
Harold, how did this job work out? 
