[250.4(A)(4)] No. You should bond these
items.
[250.4(A)(5)] No. Its resistance is too high.
[250.8(A)] Yes. They are one of the eight
permitted methods.
[250.8(B)] No. The solder will melt, causing the
connection to open.
[250.12] Ensure the surface is bare and clean.
Clamping onto a painted panel does not provide a good connection.
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