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This will be a 100a sub panel. Using Al 1-1-1-3 SER.

New Subpanel

Questions: 1.) Is this SER feeder wired and secured sufficiently?

2.) How about here where it enters the main panel? Can I put some form of insulation in this conduit to seal it? (Note there is a new wall frames in front of this original foundation wall so this will all be protected behind drywall.)

Where new Sub feeder enters main panel

New load center sticker: Load center sticker

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    1 - Why would you loop them? Makes sense on small stuff sometimes so you have extra length to rearrange things, but not on the big feeder wires. 3 - That looks totally wrong. Should be 1 or 2 (or maybe 3) cables per knockout into the box, and each knockout gets a clamp. Number of cables per knockout determined by available space but primarily by the clamp's specifications.
    – manassehkatz-Moving 2 Codidact
    Commented Nov 10, 2023 at 3:29
  • Can you post a photo of the subpanel's label please?
    – ThreePhaseEel
    Commented Nov 10, 2023 at 4:03
  • @manassehkatz-Moving2Codidact on the looping, thanks...just wanted to make sure. That second photo is the main panel, as the original builder did it. But I don't think you'd have individual clamps for each circuit (or even 2) on an exterior subpanel like what I've seen on interior panels where the circuits conductors are going out through the top.
    – crichavin
    Commented Nov 10, 2023 at 6:08
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    The looping is nice for a) thermal expansion and b) if you ever change the panel and the next one's taller.
    – Harper - Reinstate Monica
    Commented Nov 10, 2023 at 20:11
  • 1
    Not sure how much of a concern thermal expansion is, but having a bit of a service loop or flexibility is always handy.
    – SteveSh
    Commented Nov 11, 2023 at 0:37

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