In parallel conductors, which statements are true?

In parallel conductors, which statements are true?

• A. Have the same insulation type and conductor material
• B. Be the same size in CMA
• C. Be the same length and be terminated in the same manner
• D. All of these

Answer: (D)

When you parallel conductors, you want the current to share evenly. That means all the electrical and physical characteristics that affect resistance and heat must match across the conductors: they should use the same conductor material and insulation, have the same cross‑sectional size (same CMA), and be the same length with identical termination. If any of these differ, one path will carry more current than the others, leading to uneven heating, higher voltage drop on one path, and potential reliability or safety issues. Because each of those conditions supports equal current sharing, all of them being true is the correct idea. If you only match one or two aspects, mismatches in the others can still cause imbalance.

When you parallel conductors, you want the current to share evenly. That means all the electrical and physical characteristics that affect resistance and heat must match across the conductors: they should use the same conductor material and insulation, have the same cross‑sectional size (same CMA), and be the same length with identical termination. If any of these differ, one path will carry more current than the others, leading to uneven heating, higher voltage drop on one path, and potential reliability or safety issues.

Because each of those conditions supports equal current sharing, all of them being true is the correct idea. If you only match one or two aspects, mismatches in the others can still cause imbalance.