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An upgrade from 60 to 200 Amp service involves: New SE cable from the weatherhead down to the new meter can, and from the can to the new panelboard. If the length of SE cable from the meter can to the panelboard exceeds ~6 feet, plan on an exterior rated disconnecting means. If the panelboard being installed is the same manufacturer as the old one, you should be able to change over all existing breakers, provided that there's nothing wrong with any of them. You should check and upgrade if needed the size of the grounding electrode conductor going to your municipal water line (if supplied) and/or the driven ground. As part of the contractor's proposal, it must include contact with the power company to ensure that the upgrade doesn't run afoul of new rules that they have, an inspection by an independent underwiter, and the necessary permitting if required by the Authority Having Jurisdiction, e.g. the City, Township, or Borough Licenses and Inspection Department/Code Enforcement.
Without a lot of additional information, I couldn't give you an accurate price, but figure on $1000 at minimum.
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There ain't nothin' more powerful than the odor of mendacity -Big Daddy
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