Designer101
Senior Member
- Location
- California
- Occupation
- Solar and ESS Designer
Rapid shutdown 2017 requirement per NEC 2017
outside the array boundary 30 volts within 30 seconds of rapid shutdown initiation, when controlled conductors outside array boundary are more than 3 ft away.
Inside array boundary 80 volts within 30 second o rapid shutdown initiation, when controlled conductors are within 3 ft of array Boundary.
We have installed one Inverter 7.6 kw inside sub panel that is 90 Ft away from main panel
we have installed another inverter 7.6 kw in the main panel
4 Pole AC Disconnect switches off both the PV system at once to initiate rapid shutdown and is installed within 10 ft of main panel.
Now per my understanding Rapid shutdown is meant for fire fighters safety , so it should be limited to roof top only and it should be dc voltage that should be tested.
Plan reviewer is saying that we cannot install inverter breaker inside sub panel that's located inside house, it has to be readily accessible , Which is the misinterpretation of the code.
he said he will tell the inspector to test the voltage inside the sub panel to comply that with rapid shutdown voltage and I am sure it will fail the test. That sub panel is always energized so it will sure not pass the test.
They can test the voltage between any two conductors or any two conductors and ground in the Ac disconnect mounted outside but they cant test that inside sub panel.
I thought that's the whole point of mounting ac disconnect outside the main panel within 10 ft.
he gave us the conditional permit that the voltage will be tested at inspection at sub panel and is pretty confident to fails us at inspection. I wanted to take the suggestion from this group before we proceed..
Please give me your insights on this, thank you.
outside the array boundary 30 volts within 30 seconds of rapid shutdown initiation, when controlled conductors outside array boundary are more than 3 ft away.
Inside array boundary 80 volts within 30 second o rapid shutdown initiation, when controlled conductors are within 3 ft of array Boundary.
We have installed one Inverter 7.6 kw inside sub panel that is 90 Ft away from main panel
we have installed another inverter 7.6 kw in the main panel
4 Pole AC Disconnect switches off both the PV system at once to initiate rapid shutdown and is installed within 10 ft of main panel.
Now per my understanding Rapid shutdown is meant for fire fighters safety , so it should be limited to roof top only and it should be dc voltage that should be tested.
Plan reviewer is saying that we cannot install inverter breaker inside sub panel that's located inside house, it has to be readily accessible , Which is the misinterpretation of the code.
he said he will tell the inspector to test the voltage inside the sub panel to comply that with rapid shutdown voltage and I am sure it will fail the test. That sub panel is always energized so it will sure not pass the test.
They can test the voltage between any two conductors or any two conductors and ground in the Ac disconnect mounted outside but they cant test that inside sub panel.
I thought that's the whole point of mounting ac disconnect outside the main panel within 10 ft.
he gave us the conditional permit that the voltage will be tested at inspection at sub panel and is pretty confident to fails us at inspection. I wanted to take the suggestion from this group before we proceed..
Please give me your insights on this, thank you.