PVC shall not be permitted where ambient temperature exceeds ___ unless listed otherwise.

PVC shall not be permitted where ambient temperature exceeds ___ unless listed otherwise.

• A. 122°F
• B. 115°F
• C. 125°F
• D. 143°F

Answer: (A)

PVC conduit is chosen for its ease of installation, but plastics soften and lose structural strength as temperature rises. To keep the conduit rigid and the conductor insulation protected, there’s a set ambient temperature limit. The rule states that PVC shall not be used where the surrounding air temperature exceeds 122°F unless the product is specifically listed for higher temperatures. If you’re in a hot location where ambient could exceed that, you’d need to use a listed higher-temperature PVC or switch to a different material such as metal conduit, as permitted by the listing and code. The other temperatures don’t align with the standard ambient limit for PVC in this context.

PVC conduit is chosen for its ease of installation, but plastics soften and lose structural strength as temperature rises. To keep the conduit rigid and the conductor insulation protected, there’s a set ambient temperature limit. The rule states that PVC shall not be used where the surrounding air temperature exceeds 122°F unless the product is specifically listed for higher temperatures. If you’re in a hot location where ambient could exceed that, you’d need to use a listed higher-temperature PVC or switch to a different material such as metal conduit, as permitted by the listing and code. The other temperatures don’t align with the standard ambient limit for PVC in this context.