A licensed contractor (i.e. electrical, sign, residential appliance installation) must display its name and license number on both sides of each vehicle owned or operated by the business, and used in the conduct of electrical work. Lettering must be of a contrasting color, and at least two inches in height. The lettering must be permanently affixed in conspicuous places on both sides of the vehicle.
• The license number for an Electrical Contractor must be preceded by the letters "TECL":
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Example: for an Electrical Contractor license number "1234" the sign would read "TECL 1234."
• The license number for an Electrical Sign Contractor must be preceded by the letters "TSCL":
Example: for a Sign Contractor license number "1234", the sign would read "TSCL 1234."
• The license number for a Residential Appliance Installation Contractor must be preceded by the letters "TICL":
Example: For a Residential Appliance Installation Contractor license number "1234", the sign would read "TICL 1234."
Information provided by the Texas Department of Licensing and Regulation.