5 Things to Know About Using SJTW Extension Cords in Sunlight

The “W” in SJTW means weather-resistant, not sunlight-resistant It handles rain and moisture but not continuous UV exposure.

Direct sunlight can exceed the cord’s temperature rating The ambient rating is -40°C to 60°C, but dark surfaces and direct sun push surface temps higher, softening or cracking the insulation.

UV degrades the thermoplastic jacket over time It becomes brittle, cracks, and exposes wires within a season or two of daily sun exposure.

For permanent outdoor sun exposure, choose SJOOW or SOOW cords These have better UV stabilizers and are rated for sunlight. Look for a “sunlight-resistant” tag.

An SJTW is fine for occasional or short-term sun use It will survive brief exposure, but don’t expect it to last years. Spend more on the right cord to avoid shorts later.