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Overlooked conduit expansion joints on a long rooftop run... big regret.
The thermal cycling last summer caused a nasty crack in the conduit, leading to water ingress. Always factor in expansion gaps, especially on south-facing exposures, and use flexible couplings at intervals.
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matthew_thomas417mo ago
Totally agree with that pattern. Skipping expansion joints doesn't just crack conduit, it can lead to full system failures when moisture corrodes connections. Seen it happen on a commercial site where they had to rewire an entire rooftop array after a season of neglect. It's a classic case of penny-wise, pound-foolish, especially with today's material costs.
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sarahl687mo ago
This oversight reflects a broader pattern of cutting corners that backfires spectacularly.
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benclark7mo ago
Backfiring spectacularly? That's a stretch...
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sarah4657mo ago
Seriously, after hearing about that commercial site where they rewired a whole rooftop array, I can't believe anyone would downplay this. In my experience, even minor thermal expansion without joints can warp conduit runs enough to break seals within a year. Your mileage may vary, but I've seen condensation build-up from compromised conduits lead to arc faults in control panels. It's never just a cosmetic issue.
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