"Suitable" is a function of the process using the motor or motors in question and other facility loads: how sensitive are they to reduced voltage for short periods of time and how sensitive is the process to performance variation in those other loads. Finally, depending on impedances at your PCC and your neighbors, if any, can also cause some "bad neighbor" issues, which of course are also important. All that said if you do nothing to mitigate the inrush current will be 5-7 times FLA in most cases. So, your system impedance (which is always changing depending on load) will determine how big an affect there will be on voltage. If the system wasn't designed correctly you'll need a "Band-Aid" such as SVC, VFD
, soft start
, line inductors, etc.