True for the GEC, but there's no allowance in the NEC for a common MBJ ahead of multiple service disconnect enclosures, even though I think that would be better. One MBJ per service disconnect enclosure.Either. One sized for the service or one sized for each disco, or a combination using taps.
Both disconnects.If 2 or more service disconnect are grouped together in common wire way. Do you install the MBJ inside wireway or inside disconnect? Or both?