15.08.190   Additions to existing installations.
   When an addition is made to an existing electrical installation which has been installed in any approved system of wiring, if the existing installation is found to be in a safe operating condition it will not be necessary to rewire the existing part. In case the existing installation is found to be not in a safe operating condition, the unsafe wiring must be removed and rewired in accordance with the provisions of this chapter before a final certificate of approval will be issued. (Prior code § 16-1-21)