Hello all,
I am on the hunt for any EE who wants to make a few quick bucks and can stamp some documents for me. Here's some context. I installed some DIY grid tie solar last year (2.5KW) and I am looking to upgrade this year. I have the structural calcs done and stamped but ran into a new problem. I am upgrading the system to 8.5KW total size and I have a center fed panel box. Luckily the changes to the NEC allow the 120% rule to apply to center fed panels now. Still my AHJ says they will not accept load side connections to any center fed panel without a an EE stamp even if we come in well under 120%. I have a 125 amp meter combo panel with a 100 amp breaker and I am looking to install a 40 amp PV breaker. This puts us at 140A between the main feed and the PV feed and the buses are rated at 125A the grand total is 112%. I tell this to my AHJ but they say they want something stamped saying that the buses will not see more that 120% their rating at any point in the panel. No matter what I tell them they are always right (you know how AHJ's are). Its silly because its obvious we wont come near 120%, I even asked if I still needed a stamp if I switch the main to 80 amp to come in under 100% bus rating, still no budging with the AHJ. So its either a panel replacement (very expensive), EE stamps (seem to be difficult to find but potentially cheap and easy), or finally a supply side tap (seems to be very tricky with the type of panel I have). If anyone has any suggestions or could point me in the right direction, your help would be greatly appreciated. Thank you,
Jacob.
I am on the hunt for any EE who wants to make a few quick bucks and can stamp some documents for me. Here's some context. I installed some DIY grid tie solar last year (2.5KW) and I am looking to upgrade this year. I have the structural calcs done and stamped but ran into a new problem. I am upgrading the system to 8.5KW total size and I have a center fed panel box. Luckily the changes to the NEC allow the 120% rule to apply to center fed panels now. Still my AHJ says they will not accept load side connections to any center fed panel without a an EE stamp even if we come in well under 120%. I have a 125 amp meter combo panel with a 100 amp breaker and I am looking to install a 40 amp PV breaker. This puts us at 140A between the main feed and the PV feed and the buses are rated at 125A the grand total is 112%. I tell this to my AHJ but they say they want something stamped saying that the buses will not see more that 120% their rating at any point in the panel. No matter what I tell them they are always right (you know how AHJ's are). Its silly because its obvious we wont come near 120%, I even asked if I still needed a stamp if I switch the main to 80 amp to come in under 100% bus rating, still no budging with the AHJ. So its either a panel replacement (very expensive), EE stamps (seem to be difficult to find but potentially cheap and easy), or finally a supply side tap (seems to be very tricky with the type of panel I have). If anyone has any suggestions or could point me in the right direction, your help would be greatly appreciated. Thank you,
Jacob.
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