Which color can FPL insulation be?

Which color can FPL insulation be?

• A. Blue
• B. Red
• C. Green
• D. Yellow

Answer: (A)

Color coding of flexible power conductors is about quick identification. For FPL insulation, blue is an accepted color that helps distinguish this conductor without implying it’s a hot leg or a ground. Red and yellow are commonly used for hot conductors in multi‑phase or switched circuits, and green is typically reserved for grounding. Using those colors for FPL insulation can create confusion or misinterpretation. Blue provides a safe, standard‑recognized option that keeps the conductor’s purpose clear.

Color coding of flexible power conductors is about quick identification. For FPL insulation, blue is an accepted color that helps distinguish this conductor without implying it’s a hot leg or a ground. Red and yellow are commonly used for hot conductors in multi‑phase or switched circuits, and green is typically reserved for grounding. Using those colors for FPL insulation can create confusion or misinterpretation. Blue provides a safe, standard‑recognized option that keeps the conductor’s purpose clear.