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Before you do any work research and abide by your local building codes.

For example:

Chapter 56 Dallas Electrical Code

The 2008 National Electrical Code is amended by adding a new Article 81, entitled "General Provisions," to read as follows:

81.3 Performance of Electrical Work by Homeowner.

(A) Electrical Work on Homestead Premises. A homeowner may personally install electrical conductors or equipment on homestead premises owned and occupied by the owner if the owner files approved plans and specifications with the chief electrical code administrator, satisfies the chief electrical code administrator or the assigned electrical inspector, as to the owner's ability to install electrical wiring by passing an approved written or oral examination, applies for and secures a permit where required, pays required fees, and does work in accordance with this Code and the provisions of Chapter 52 of the Dallas City Code.