The documents provided discuss the requirements for electrical equipment and installations but do not specifically list equipment requiring a UL listing inspection prior to installation in Minnesota. However, the documents do state that equipment should be 'listed' or 'labeled' by a nationally recognized testing laboratory [1]. Equipment is 'listed' if it is of a kind mentioned in a list published by a nationally recognized laboratory which makes periodic inspection of the production of such equipment and states such equipment meets nationally recognized standards or has been tested and found safe for use in a specified manner [1]. Equipment is 'labeled' if there is attached to it a label, symbol, or other identifying mark of a nationally recognized testing laboratory which makes periodic inspections of the production of such equipment and whose labeling indicates compliance with nationally recognized standards or tests to determine safe use in a specified manner [1].