AC Disconnect: Visible to Firefighter or Visible to Solar Tech? California.
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I'm trying to buy my AC disconnect (to between my GTI and the grid connection) - needs to be fused, I believe, since I'm doing a line-side tap. Simple AC disconnects, usually noted as being for air conditioners, are very cheap. "Solar" disconnects, on the other hand, seem to be very expensive: https://www.zoro.com/search?q=solar%20disconnect. I assume that's because they are also suitable for DC disconnect, with arc protection. Can I use the inexpensive AC-only disconnect ?Last edited by RShackleford; 05-16-2020, 02:04 PM. -
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In my county they let the circuit breaker be the disconnect with lots of labels. My inverter is inside the same wall as the meter and main panel which has the labels and breaker for the solar system. The installer who works in many jurisdictions made a call and got clarification from the building department, when I asked that the inverter be installed inside, instead of as originally detailed on the outside.
So we get TWO disconnects: one on each side of the basement wall.Last edited by brycenesbitt; 05-17-2020, 03:49 AM.Leave a comment:
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In my county they let the circuit breaker be the disconnect with lots of labels. My inverter is inside the same wall as the meter and main panel which has the labels and breaker for the solar system. The installer who works in many jurisdictions made a call and got clarification from the building department, when I asked that the inverter be installed inside, instead of as originally detailed on the outside.Last edited by Ampster; 05-12-2020, 03:52 PM.Leave a comment:
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Code is good, but the local inspector is the one who matters. This is a question for your local inspector.Leave a comment:
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AC Disconnect: Visible to Firefighter or Visible to Solar Tech? California.
Setup:
Underground utilities
Outside meter
Outside main breaker leading to inside subpanels.
A new inverter will be inside of the basement, about 1 meter away.
Where must the AC and DC disconnect be?
Standing right in front of either the main panel or the inverter, you can't see the other, without leaning over and looking out a window.
AC Disconnect Inside Basement.jpg
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It seems that the fire department will want the disconnect at the main panel.
It seems a future solar tech will want the ac disconnect next to the inverter.
Section 690.15 says "an ac disconnecting means shall be mounted within sight or in each inverter.".
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The 2020 code adds a safety requirement. Installing the AC disconnect indoors would increase the chance
of a child trying to open or operate it:
2020 NEC Significant Code Changes Part 4 690 – Solar Photovoltaic (PV) Systems 690.15"
"Where disconnecting means of equipment operating above 30 volts are readily accessible to unqualified persons, any enclosure door or hinged cover that exposes live parts when open shall be locked or require a tool to open."
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The 2020 code adds:
"An equipment disconnecting means shall be permitted to be remote from the equipment where the equipment disconnecting means can be remotely operated from within 3 m (10 ft) of the equipment."
So does that mean the AC disconnect can be outside, as that's less than 3 meters away? What does "remotely operated" mean?Last edited by brycenesbitt; 05-12-2020, 02:52 AM. Reason: 2020 code change "An equipment disconnecting means shall be permitted to be remote from the equipmen"
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