Which statement about XLPE cables compared to PVC cables is correct?

Which statement about XLPE cables compared to PVC cables is correct?

• A. XLPE has a higher temperature rating than PVC (90°C vs 70°C).
• B. XLPE has a lower temperature rating than PVC.
• C. XLPE cannot be run outside.
• D. XLPE is heavier than PVC cables.

Answer: (A)

The main idea here is how insulation material affects a cable’s temperature rating. XLPE insulation uses cross-linked polyethylene, which is thermally more stable than conventional PVC. That cross-linking gives XLPE better resistance to heat and less tendency to soften or degrade as temperature rises. Because of this, cables with XLPE insulation are typically rated for conductor temperatures up to about 90°C, whereas PVC-insulated cables are commonly rated around 70°C. This higher rating means XLPE cables can carry more current for the same size or operate safely at higher temperatures without insulation damage. Outdoor use is determined by the outer jacket and installation, not the insulation alone, so XLPE can be suited for outdoor runs with appropriate protection. Weight isn’t inherently higher for XLPE; overall weight depends on the specific cable design, and XLPE can be comparable or even lighter in some cases.

The main idea here is how insulation material affects a cable’s temperature rating. XLPE insulation uses cross-linked polyethylene, which is thermally more stable than conventional PVC. That cross-linking gives XLPE better resistance to heat and less tendency to soften or degrade as temperature rises. Because of this, cables with XLPE insulation are typically rated for conductor temperatures up to about 90°C, whereas PVC-insulated cables are commonly rated around 70°C. This higher rating means XLPE cables can carry more current for the same size or operate safely at higher temperatures without insulation damage. Outdoor use is determined by the outer jacket and installation, not the insulation alone, so XLPE can be suited for outdoor runs with appropriate protection. Weight isn’t inherently higher for XLPE; overall weight depends on the specific cable design, and XLPE can be comparable or even lighter in some cases.