ix Code Alerts point out specific items from the e fi National Electrical Code and typical building g codes. de Sample Problems present practical, ic real-world re example problems followed by by clearl ar ly explained solutions. Review Questions allow you to demonstrates tr knowledge, identification, and comprehension eh of fi chapter material. Know the Code questions, ns which require the use of the National Electrical a l Code to answer, help you gain knowledge of and an become comfortable with the NEC.