Hello,
Ideally I'd like to make a supply-side tap on a feeder to a sub-panel. And I mean tapping the feeder line-side of the sub-panels 200 amp breaker. This is due to the limitations of the sub-panels 200 amp buss. My PV system max output is 80 amps and therefore requires a 100 amp breaker. A no-go with the 200 amp buss. The 20% allowance won't work and I cannot downsize the 200 amp breaker to make it work due to panel loads. I would have to upgrade the panel to 400 amps. FYI this is 208/120 3 phase. I have done supply-side connections before but only on a buildings main service. Do all the same rules apply? What might be different I should take into consideration? Thanks. Kirk Herander VT Solar, LLC dba Vermont Solar Engineering NABCEPTM Certified installer Charter Member NYSERDA-eligible Installer VT RE Incentive Program Partner 802.863.1202
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