Yes we do every job to NEC, and NRC Code. we are profectionists and strive to do every job perfect. If there would be a failure do to the quality of our work we will fix it at no charge to you. One thing the we cannot control is the quality of the products installed however if there would ever be an issue we will work with you to get a resolution from the manufacturer. One thing the we will do is recomend products that have a proven track record of quality.