Rockwell Automation 284 ArmorStart User Manual - Manual (Page 440)

E-8 Group Motor Installations
To summarize, the design of the ArmorStart controllers in group
motor applications is to be carried out as described above. The user
supplied line side SCPD and wiring has to meet the minimum
requirements determined above, however, the SCPD is required to
protect the ArmorStart controller’s associated line side wiring only
and can be increased to the values allowed in the maximum ratings
tables above. Because the maximum line side conductor for the
ArmorStart is #10 AWG this is the maximum tap wire or daisy-chain
wiring that can be used to take advantage of the ArmorStart’s
maximum input ratings.
A benefit to the ArmorStart rating and the above design process using
NFPA rules is that the industrial equipment that utilizes several group
motor installations on different branch circuits can standardize the
size of the SCPD and the branch wiring for all the branch circuits of
the installation as long as they do not exceed the maximum ratings of
Table E.1as extended by the UL Certificate of Compliances for
combined ArmorStart and ArmorConnect installations, ArmorStart,
which ever is less.