this post was submitted on 26 May 2025
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Arcing causes more fires, because over current caused all the fires until we tightened standards and dual-mode circuit breakers.
Now fires are caused by loose connections arcing, and damaged wires arcing to flammable material.
Breakers are specifically designed for a sustained current, but arcing is dangerous because it tends to cascade, light arcing damages contacts, leading to more arcing in a cycle.
The real danger of arcing is that it can happen outside of view, and start fires that aren't caught till everything burns down.