NEC Quiz: Article 324 Answers

by Mark Lamendola

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  1. It addresses Flat Conductor Cable (Type FCC).  Belden defines Flat Conductor Cable as "A flat cable with a plurality of flat conductors." A Flat Cable Assembly (Article 322) is a flat cable cable integrated with connectors (thus making it an assembly).

    The NEC distinguishes between these two wiring methods because if you're installing a system in the field then Type FCC involves attaching your own connectors, while Type FC means plugging them in.
     

  2. You can use them for general-purpose branch circuits, appliance branch circuits, and individual branch circuits [324.10]. It sounds like you can use them for branch circuits, period.
     

  3. There are four: where exposed to corrosive conditions (unlike for FC, "unless suitable for the application" does not apply"), in any hazardous (see Chapter 5) location, outdoors (or in wet or damp locations), and in residential, school, or hospital buildings [324.12].
     

  4. That's a trick question. You do not support it with staples. You must secure and support flat cables using an adhesive or mechanical anchoring system identified for the use [324.30].
     

  5. Use connectors identified for the use. Install them such that you provide electrical continuity, insulation, and sealing against dampness and liquid spillage [324.40(A)]. This requirement excludes (from acceptability) such things as soldering extensions onto the flat cable conductors. That practice is mentioned here because electronics technicians sometimes mistakenly apply their techniques to 50V and higher power circuits.