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4.6.3.1 The installation of all wiring, cable, and equipment shall be performed in accordance with NFPA 70, Article 725 or Article 800, where applicable.

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Below is a sample of NFPA 731. For the complete section, see the actual NFPA 731 text at NFPA.ORG. Once there, click on the free access link to the the latest edition of NFPA 731.

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NEC Article 725 covers Class 1, Class 2, and Class 3 remote-control, signaling, and power-limited circuits which are often used in a security system. NEC® Article 800 covers communications systems such as phone lines which are often used to alert security monitoring companies of a potential breach in the system.

Below is a sample of the NEC®. See the actual NEC® text at NFPA.ORG for the complete code section. Once there, click on their link to free access to the latest NEC® edition of NFPA 70.

Class 1 Circuit. The portion of the wiring system between the load side of the overcurrent device or power-limited supply and the connected equipment.

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Transform your control room operations a single communication platform that seamlessly integrates with voice devices and related mission-critical communication technologies to simplify incident management and remove workflow barriers for operators and dispatchers.

Experience a modern dispatch experience that combines voice, data, messaging, telephony and mapping — all on one screen. A reliable connection encourages increased collaboration and empowers your teams to communicate with clarity and confidence.

NFPA 731 Section 4.6.3.1 requires the installation of all wiring, cable, and equipment to be performed in accordance with NFPA 70 (NEC), Article 725 or Article 800, where applicable.

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Class 3 Circuit. The portion of the wiring system between the load side of a Class 3 power source and the connected equipment. Due to its power limitations, a Class 3 circuit considers safety from a fire initiation standpoint. Since higher levels of voltage and current than for Class 2 are permitted, additional safeguards are specified to provide protection from an electric shock hazard that could be encountered.

Class 2 Circuit. The portion of the wiring system between the load side of a Class 2 power source and the connected equipment. Due to its power limitations, a Class 2 circuit is considered safe from a fire initiation standpoint and provides acceptable protection from electric shock.

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