300-360 · Question #9
A cabling contractor is working at a customer facility. The contractor is asking what rating of cable should be installed in return-air areas. Which information can be referenced to provide the…
The correct answer is B. BICSI TDDM. The BICSI TDDM (Telecommunications Distribution Design Manual) is the telecommunications industry's primary reference standard for structured cabling design and installation, including specifications for cable ratings in different environmental areas such as plenum (return-air)…
Question
A cabling contractor is working at a customer facility. The contractor is asking what rating of cable should be installed in return-air areas. Which information can be referenced to provide the contractor the requested information?
Options
- AOSHA Codes
- BBICSI TDDM
- CNEC Ratings
- DIEEE Standards
How the community answered
(23 responses)- A9% (2)
- B87% (20)
- C4% (1)
Explanation
The BICSI TDDM (Telecommunications Distribution Design Manual) is the telecommunications industry's primary reference standard for structured cabling design and installation, including specifications for cable ratings in different environmental areas such as plenum (return-air) spaces. Return-air/plenum areas require cables rated for low smoke and flame spread (typically CMP - Communications Multipurpose Plenum rated). The BICSI TDDM consolidates and references fire and safety code requirements applicable to telecommunications cabling. While the NEC (C) also contains relevant fire ratings, BICSI TDDM is the go-to industry reference specifically for telecommunications cabling installation guidance. OSHA (A) covers occupational safety, not cable ratings, and IEEE Standards (D) address protocol/electrical specifications.
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