IP Ratings Explained: Dry, Damp and Wet Locations: FlowLite linear LED lighting, soffit
LED Academy · Specifying

IP Ratings Explained: Dry, Damp and Wet Locations

What the two digits of an IP code mean, how they relate to UL location ratings, and how to pick the right protection.

4 min readFlowLite Applications Team

Tape light goes everywhere: inside millwork, inside shower niches, along exterior soffits and under bar tops that get wiped down every night. Choosing the right protection means understanding two systems that are often confused: the international IP code and the North American dry, damp and wet location ratings.

How to read an IP code

The Ingress Protection (IP) code, defined by IEC 60529, uses two digits. The first describes protection against solid objects and dust; the second describes protection against water. Higher is more protective. An X means that property wasn't tested.

1st digitSolids
0No protection
1Objects over 50 mm (back of a hand)
2Objects over 12.5 mm (fingers)
3Objects over 2.5 mm (tools, thick wire)
4Objects over 1 mm (fine wire)
5Dust protected
6Dust tight
2nd digitWater
0No protection
1–2Dripping water (vertical, then tilted 15°)
3Spraying water
4Splashing from any direction
5Low-pressure water jets
6Powerful water jets
7Temporary immersion, up to 1 m
8Continuous immersion, beyond 1 m, as specified by the manufacturer

Common ratings in tape light

RatingTypical constructionUse it for
IP20Bare tape, no coatingIndoor dry locations: coves, millwork, cabinets, display
IP54Thin coating or protected housingIndoor areas with occasional splashing or dust
IP65Silicone coating or sleeveDamp areas and protected exterior locations
IP67 / IP68Fully encapsulated, sealed end caps and leadsWet locations, direct exposure, immersion where specified

IP is not the same as a UL location rating

In North America, luminaires are listed for dry, damp or wet locations under UL standards, and the electrical code refers to those terms, not IP codes. An IP number describes a test result. It doesn't replace a location listing.

  • Dry: not normally subject to moisture, such as interior coves, cabinets and ceilings.
  • Damp: exposed to moderate moisture or condensation, such as covered porches, some bathrooms and protected soffits.
  • Wet: exposed to direct water, rain or wash-down, such as uncovered exteriors, showers and fountains.

Practical guidance

  • Specify the location listing first (dry, damp, wet), then the IP rating that goes with it.
  • A channel with a lens improves protection against dust and touch, but doesn't make an IP20 tape damp-rated by itself.
  • Higher ratings add coatings that can slightly reduce output and shift color, and they limit field cutting. Use them only where needed.
  • Protect connections and drivers, too. A sealed tape with an exposed connector is only as good as the connector.

Key takeaways

  • IP code: first digit for solids, second for water.
  • IP20 = bare tape for indoor dry use; IP65 and up for damp or wet.
  • North American codes use dry/damp/wet listings; IP doesn't replace them.
  • IP20 tape is for indoor dry locations only; use IP54 or IP67 tape elsewhere.