Practice question

What type of cable is typically specified by IMSA for multi-conductor traffic signal head and interconnect wiring (not loop lead-in)?

  1. Standard household Romex cable
  2. IMSA specification 19-1 or 20-1 cable
  3. IMSA specification 50-2 shielded twisted-pair lead-in
  4. Coaxial cable (RG-6)

Answer: B — IMSA specification 19-1 or 20-1 cable

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