The installation instructions for the GCB molded case circuit breakers show very large spacing requirements to metal or live electrical parts. For example the GCB600 shows 4.17" left and right, and 14.37" above and below.

In contrast the instructions for the FUJI BW630 do not show any spacing requirement. Does this mean that they are listed to be mounted with zero spacing to each other? And spacing to enclosure or other live parts to be as stated in section 10 of the UL508A?