CX4-960 Circuit Requirements

I did a quick check of a CX4-960 configuration with 8 DAEs filled with 15k RPM FC drives, and the expected power draw of such a config is between 15A and 16A (expected power draw if using other drives types, would be lower). Actual circuit load shouldn't exceed 80% of the rated capacity, thus anything up to 16A (.80 x 20A) looks acceptable for 20A service (220V is implied here).

That said, some considerations;
- Any other devices that may be co-located with the CX4-960 (e.g. switches) would add to the power draw, which will likely put the config above 16A.
- Any future DAE adds would add to the power drive, which will likely put the config above 16A.
- If the config will be housed in an EMC rack; the EMC racks for CX4-series are configured with L6-30P plugs, which are for 30A service. Also, the PDUs within the EMC rack have breaker protection based on 30A service. Thus if using an EMC rack, you'd want to target 30A service rather than 20A service.

In light of those considerations; using 20A service looks viable if the config will be housed in a non-EMC rack, there are no additional devices drawing power, and no near-term plan to add additional DAEs. Else, 30A service should probably be considered.

Regards,
DGM