What is IP? – Episode 6

NLC Academy · Episode 6

What is IP?

Ingress Protection, the IEC 60529 code in under two minutes.

Two digits, in this order

IP 6 5

1st digit = solids & dust

2nd digit = water

First digit, protection from solids

From 0 to 6

0none

1>50 mm

2>12 mm

3>2.5 mm

4>1 mm

5dust-protected

6dust-tight

6 means no dust gets in, the Saudi outdoor floor.

Second digit, protection from water

From 0 to 9K

0none

3spray

4splash

5jets

6strong jets

7immersion

8submersion

9Khot washdown

Each step is a different test, never substitute one for another.

How the rating is earned

The test runs on the fixture

Each digit is a separate lab test on the real luminaire: dust circulated around the sealed body, then a calibrated jet aimed at every gasket and gland.

The Shamal test

Saudi outdoor minimum is IP65

Sand and dust storms put anything below IP6X at risk. Civil Defense effectively rejects IP54 streetlights now.

The trade-off

Higher IP = worse thermal

IP20 coolerIP69K hotter

A sealed body cannot dump heat. Spec the minimum IP you actually need.

Where each code belongs

IP20Indoor offices & classrooms

IP54Garages & sheltered exterior

IP65Streetlights & canopies

IP66Façades & marine-adjacent

IP67Walkway uplights & planters

IP68Fountains & pool walls

IP69KFood production & car wash

Spec the minimum IP you actually need.

NLC Outdoor & Industrial defaults to IP66, stainless glands, Gulf-graded gaskets.

0:00 / 0:00

Animated explainer, press play to watch the concepts now; the filmed cut publishes once production wraps.

Key Takeaways

What you'll walk away with

Four ideas to carry into the next specification conversation you have.

Two digits, in this order: solids then liquids.

IP65 means 6 = dust-tight, 5 = protected against water jets. Higher is more sealed, not better, over-sealing hurts thermal.

Saudi outdoor minimum is IP65.

Sand and dust storms (Shamal season) put any rating below IP6X at risk. Civil Defense effectively rejects IP54 streetlights now.

IP66 ≠ IP67 ≠ IP68 ≠ IP69K.

Each second-digit step is a different test: jets, immersion, prolonged immersion, hot high-pressure washdown. Don't substitute one for another.

Higher IP = worse thermal performance.

A sealed body cannot dump heat. The driver and LED run hotter, and lose life. Spec the minimum IP you actually need.

Reference

IP code matrix, what each digit certifies

Per IEC 60529. Bracket the spec to the lowest digit that meets the environment, higher costs thermal life.

IP code	Protects against	Where it belongs
IP20	Solid > 12 mm · no water	Indoor offices · classrooms
IP44	Solid > 1 mm · splash from any direction	Bathrooms · semi-covered balconies
IP54	Limited dust · splash	Garages · sheltered exterior
IP65	Dust-tight · water jets	Streetlights · canopies
IP66	Dust-tight · strong jets	Façades · marine-adjacent
IP67	Dust-tight · 1 m immersion 30 min	Walkway uplights · planters
IP68	Continuous submersion (depth defined)	Fountains · pool walls
IP69K	High-pressure hot washdown	Food production · car wash

Deep Dive

Reading IP in context

Five facts that change how you spec ingress protection on a Saudi project.

The Shamal is the test no lab can replicate.

Saudi summers bring sustained dust storms with PM10 above 1000 µg/m³. A nominal IP54 fixture passes the lab's calibrated dust chamber but fails open-window seal in three years. We see this on retrofit projects every season.

Gaskets age. Re-test annually for critical sites.

IP ratings test new fixtures. A silicone gasket in 60 °C ambient loses ≈ 30% of its compression after 5 years. For tunnels, airports, and critical infrastructure, plan a re-test cadence into the maintenance contract.

First-digit-6 means dust-tight, not dust-proof.

IPx6 is verified by 8 hours under negative pressure with talc particles. No particles enter. "Dust-tight" in trade language; "dust-proof" in marketing, they are the same in code.

Higher IP costs lumen depreciation.

A sealed luminaire traps junction-temperature heat. An IP65 highbay typically derates lumens 5–10% vs an IP20 equivalent with the same chip. The L80B10 rating drops accordingly. Spec the minimum IP you need.

Connectors fail before bodies do.

Most field IP failures are at the cable gland or quick-connector, not the optic. A body rated IP66 with an IP54 gland is overall IP54. Inspect at delivery; reject mismatched components.

From the Academy to the Field

NLC Outdoor & Industrial, built to a higher IP than the spec demands.

Our outdoor catalogue defaults to IP66 with stainless cable glands and silicone gaskets graded for 25-year service in Gulf ambient.

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SLIDE 01

What is IP? The two digits that decide survival

SLIDE 02

What does IP65 actually guarantee?

SLIDE 03

First digit is dust, second digit is water

10 slides · LinkedIn-ready. Download all 10 as high-res PNGs and post them straight to LinkedIn as a carousel. PDF version still available.

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What is IP? The two digits that decide if a fixture survives a Saudi summer