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Old 11-02-2018, 05:00 PM   #1
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Default Wiring a Residential PV System

If I am wiring a residential pv system and I am backfeeding a breaker, to a disconnect and then to the inverter, the set of wires from the back fed breaker will go the line side or load side of the disconnect?
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Old 11-02-2018, 05:03 PM   #2
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If I am wiring a residential pv system and I am backfeeding a breaker, to a disconnect and then to the inverter, the set of wires from the back fed breaker will go the line side or load side of the disconnect?
Remember that you are backfeeding the breaker. The PV goes into the line side of the disconnect and the load side goes to the breaker.
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Old 11-02-2018, 08:06 PM   #3
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Yeah that's what I thought, but someone I was working with tried telling me I was supposed to bring the wires from the breaker to the line side,
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Old 11-11-2018, 10:05 AM   #4
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From a safety stand-point...
A grid-tied inverter will cease production if it loses grid power. Turning the PV AC disconnect off will kill the inverter AC production and de-energize the inverter to disco conductors. Landing the Grid side conductors on the line side of the disco creates a more familiar electrical scenario, disco is off and load conductors are de-energized, line side is still hot. I have been directed by electrical engineers to install the grid conductors on the line side of the disco....especially with line side taps and fusible disconnects.

At the end of the day it really doesn't matter functionally...I am sure you are installing the required dual power source labels anyway, hope the next guy is paying attention.
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Old 11-11-2018, 11:12 AM   #5
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I just love driving by a two million dollar residence and seeing a meter main socket with four disconnects , 2 Sunny Boys, 2 RT gutter cans, slew of pipe nipples, all sorts of glaring colored labeling, all in either the front of the place or within 4 foot of the front corner on the side........ A regular CS mess. Once or twice I see a Tesla wall pack also . It's like taking a big hose and shooting ugly juice all over the front of the house. Mind you , these same wealthy home owners gave the original electricians hell on earth for even putting up an underground fed meter main and a sidewalk pull box near it. But when the pv guys show up and tell the same homeowner he can save $50 dollars a month, he immediately asks which of his children he should kill to please the sun god.
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Old 04-01-2019, 09:53 PM   #6
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A regular CS mess.
Hath thou invoked the name of our departed feathered friend?
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Old 04-01-2019, 10:05 PM   #7
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Hath thou invoked the name of our departed feathered friend?
don't worry, does nothing unless he says it 3 times into a mirror
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