NFPA 731 Section 4.6.3.12(1) requires conductors to be protected from abrasion. In addition, since NFPA 731 Section 4.6.3.1 requires security wiring to be installed in accordance with NEC^® Article 725, where applicable, the bushing requirements in 725.3(J) apply (see code language below).

Many new security systems are installed on existing buildings which often results in the security system installer working without a permit or required inspections. Continued uninspected work over years often results in installers that are unfamiliar with the code language or changing code requirements. It is critical to know the codes and where to find specific requirements within published standards and codes in order to ensure code compliant and safe installations.

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 latest edition of NFPA 731.

4.6.3 Wiring.

4.6.3.12 At raceway connections to junction boxes and open ends of raceways, the following shall apply:

(1) Conductors shall be protected from abrasion.

(2) Raceway shall be sized and installed in accordance with NFPA 70.

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.

725.3(J) Bushing. A bushing shall be installed where cables emerge from raceway used for mechanical support or protection in accordance with 300.15(C).

300.15(C) Protection. A box or conduit body shall not be required where cables enter or exit from conduit or tubing that is used to provide cable support or protection against physical damage. A fitting shall be provided on the end(s) of the conduit or tubing to protect the cable from abrasion.