- The 2014 edition of NFPA 70: National Electrical Code responds to a changing world with new requirements addressing the emerging use of DC power in many applications, and new information about reducing electrical fire and shock hazards. Four added Articles expand coverage on growing technologies, including Low Voltage Suspended Ceiling Power Distribution Systems (Article 393); Modular Data Centers (Article 646); Fire Resistive Cable Systems (Article 728); and Energy Management Systems (Article 750). Other new or revised requirements enhance protection of electrical personnel from the risks of shock and electrocution, such as centralized locking requirements and revisions dealing with field marking of equipment and hazard warning labels.