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hmmm, I'm not sure I understand your question. You don't say when you bought the house or what the seller told you about the electrical. There are no specific rules about what sellers are required to disclose with regard to electrical. That's why buyers are strongly encouraged to have a home inspection done. And, pursuant to that inspection, if you felt further scrutiny was needed, you could request an inspection to be done by an electrician or something.
Thing is, I'm wondering, did the seller tell you that ALL of the wiring was new or just the electrical panel was updated or did they say nothing? If they told you in writing or through their agent that all of the electrical, including the wiring, you may consider opening this up as an arbitration or a court case, depending on the expense and what type of paper work was signed when you purchased the property.
Your agent that you used when you purchased the property should, at the very least, be able to help you ferret out the particulars of what information was exchanged when you purchased. AND, since I don't know anything other than what you've posed here, I will strongly suggest that you seek legal advice from an attorney before you make your decision about what to do.