What does IP rating mean?

IP stands for Ingress Protection, defined by BS EN 60529. The code has two digits: the first (0-6) indicates protection against solid objects (dust, fingers, etc.), and the second (0-8) indicates protection against water. For example, IP65 means dust-tight and protected against water jets. The higher the number, the greater the protection. An 'X' in place of a digit means that characteristic was not tested.

What IP rating do I need for outdoor electrical equipment?

For outdoor exposed locations, BS 7671 requires a minimum of IP44 (protected against objects >1mm and splashing water). For locations with high-pressure cleaning or water jets, IP55 or IP56 is needed. For equipment buried underground, IP68 is typical. Sheltered outdoor locations (under a porch or canopy) may only need IP23. Always check the specific BS 7671 section for your installation — bathrooms, swimming pools, and agricultural buildings have specific requirements.

What is the difference between IP65 and IP67?

Both are dust-tight (first digit 6). IP65 protects against water jets from a 6.3mm nozzle at 12.5L/min — suitable for outdoor equipment exposed to rain and hose-down cleaning. IP67 protects against temporary immersion at 1m depth for 30 minutes — suitable for equipment that may be temporarily submerged (e.g., ground-level junction boxes that could flood). IP67 is NOT rated for permanent submersion — that requires IP68.

Do bathroom lights need a specific IP rating?

Yes — per BS 7671 Section 701: Zone 0 (inside bath/shower) requires IPX7 (temporary immersion). Zone 1 (above bath to 2.25m) requires IPX4 minimum (splash-proof), or IPX5 if high-pressure water jets are used. Zone 2 (0.6m from Zone 1) requires IPX4 minimum. Outside zones — no specific IP requirement, but IPX4 is good practice for any bathroom fitting due to steam and condensation.

What does the 'X' mean in IP codes like IPX4?

An 'X' indicates that the equipment has not been tested for that particular protection type. IPX4 means the water protection (second digit) is rated at 4 (splash-proof) but the solid protection (first digit) was not rated. This is common for bathroom fittings where water protection is the critical factor. The X does NOT mean zero protection — it simply means no specific test was performed. For a complete rating, both digits should be specified.

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IP Rating Calculator — BS EN 60529

Determine the required IP (Ingress Protection) rating for electrical equipment based on installation location, or decode an IP code to understand its meaning.

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Where the equipment will be installed

How We Calculate This

This calculator helps you determine the required IP rating for electrical equipment based on installation location, or decode an existing IP code.

IP Code Structure: IP[Solid][Water]

First digit (0-6): Protection against solid objects and dust
Second digit (0-8): Protection against water ingress
IP20: Indoor dry — minimum for switchgear
IP44: Outdoor exposed — splash-proof
IP65: Dust-tight, jet-proof — outdoor/industrial
IPX7: Bathroom Zone 0 — temporary immersion

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Last updated: March 2026

All calculations are estimates. Verify with your supplier.