However, more than 42,000 jurisdictions in the United States now have some sort of code enforcement in place, and that number is increasing every day. The code covers initiation of fire by electronic cable, as well as flame spread and electrical shock characteristics of the cable and circuit.Īs an alarm technician, your work on low-voltage security systems may not, at this time, fall under permitting and electrical code inspection requirements. These requirements specified fire resistance levels for cable. The code now has listing requirements for communication and power-limited circuit cable. Since power supply technologies are covered elsewhere in this issue ( see power supplies feature), I thought it made sense to stick with this theme, but to approach it from a slightly different angle.īack in 1987, the NEC introduced some changes that had a major impact on the wire and cable industry. It is often driven by familiarity with the National Electrical Code (NEC) and the rules from which most of our livelihoods are derived. This is an important tech topic in the security industry. It has been some time ( October 2003) since we last discussed understanding and properly applying low-voltage power supplies and cabling.
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