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What causes the prong on my RV electric plug to turn dark? Have replaced the plug because it looked damages but the new plug is starting to turn too.

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The plug is turning dark because of the heat generated by the electrical current running through it. This is common and nothing to be concerned about. However, if the plug is getting too warm, it is an indication that the wire size isn't adequate for the amperage and you may consider using a larger gauge wire.

Posted on Jul 07, 2010

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