This was a house that had solar electric panels installed on the roof and everything did appear to be professionally installed but I haven’t seen these wires on the service entrance cables before. I don’t get that many solar installations here in PA–not enough incentives. If anyone with knowledge in this area could give an opinion, I would appreciate it. Of course I will still reccomend review by a solar contractor, so on and so forth, it just asking for my knowledge. Thank you.
Where did those wires go? Those appear to be Insulation Piercing Connectors
There was no backfeed breaker for the PV in the panel, correct? you didn’t post a pic of the entire panel.
Most likely they are the PV backfeed taps through the line (supply) side of the main breaker/disconnect to comply with NEC 705.12 when the output of PV system can overload the busbar. If you feed the busbar with power from the main breaker and too much power from the PV backfeed breaker, you can overload and overheat the busbar.
From my limited experience you never tap the mains…
How else do you do it? It is allowed per NEC 2020 705.11 and prior by 705.12(A) You’re probably confusing it with using a single terminal lug not rated for multiple conductors.
Off the cuff! I’d supply an in series breaker…Just thinking"…
I would never tap the main.Nope!
There is more than one way to skin a cat…Yep!
That’s a first for me. I’m interested in hearing more about those inline connectors.