Lamp Cord Types Explained

SPT-1 is the thin flat cord on most table lamps; SPT-2 has thicker insulation for floor lamps and heavier draw. Cloth-covered cord is period-correct for pre-1950 fixtures and is now made over modern insulation. Grounded three-conductor cord belongs on metal fixtures with a grounding terminal.

What we see on the bench

Nearly every lamp that comes through our Thornton shop tells the same story in a different way: the object outlived its wiring. Cord insulation dries out, socket contacts flatten, switch springs weaken, and the failure shows up as flicker long before it shows up as a dead lamp. Catching it at the flicker stage keeps a repair small.

When to call a professional

Stop using any lamp that smells hot, trips a breaker, or has visible copper. If the fixture is hardwired, mounted overhead, or older than 1960, have it inspected rather than patched. We give free estimates and will tell you when a repair is not worth the money.

Ask us about your lamp →