Originally Posted by

**KHall**
I have a 3 phase panel with 7 different 208V/1 phase loads. I calculated the load for each 2 pole circuit by multiplying the load amps by 208. The VA totals for each phase are as follows ...

A = 18,242 VA

B = 18,242 VA

C = 16,224 VA

How do I convert this into a total connected load figure for this panel and would that (along with 25% of my largest motor) be the basis for sizing my feeder and main breaker?

The system is 120/208, 3 phase, 4 wire.

[Minimum] sizing of main breakers and feeders are done through Article 220 calculations under Patrs III, IV, and/or V. There are quite a few factors which impact the minimum sizing, including continuous and non-continuous loads. The calculations are the only NEC-compliant method.

In determining size for imbalance, your loads, as distributed on the phases, will have to be converted to line current and weighed against the minimum size as calculated to determine if larger sizing is required.

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