UK guide to IP44 — protection against 1mm objects and splashing water per IEC 60529. BS 7671 minimum for bathroom zones and sheltered outdoor locations.
IP44 means an enclosure is protected against solid objects larger than 1mm (wires, screws, small insects) and splashing water from any direction, tested per IEC 60529. It is the BS 7671 Section 701 minimum for bathroom Zones 1 and 2, and is suitable for sheltered outdoor locations like porches, eaves, and covered patios. IP44 is NOT suitable for fully exposed outdoor installations — rain-driven spray and hose jets will cause ingress within a few seasons. For exposed outdoor use, step up to IP65.
| Attribute | IP44 Specification |
|---|---|
| Solids protection | 1mm+ objects excluded (wire, tools, small insects) |
| Water protection | Splashing water from all directions (10 L/min, 10 min) |
| Water jets? | NOT protected (needs IP65 or higher) |
| Test standard | IEC 60529 (BS EN 60529 in the UK) |
| BS 7671 relevance | Min for bathroom Zone 1-2, sauna Zone 2-3, construction site sockets |
| Typical UK applications | Bathroom downlights, porch lights, shaver sockets, under-eave fittings |
IP ratings follow the format IP[digit 1][digit 2], defined by IEC 60529. For IP44:
Protection against solid objects larger than 1mm. Tested by pressing a 1mm diameter metal test rod against all openings with 1N force. No entry is permitted. IP4X is sufficient to exclude wires, small screws, and most insects, but NOT fine dust or dust particles smaller than 1mm.
Protection against splashing water from any direction. Tested with an oscillating semicircular pipe (120 orifices) spraying 10 L/min of water from all directions at the enclosure for 10 minutes. No harmful ingress permitted. IPX4 does NOT cover water jets (IPX5) or immersion (IPX7).
Key point: "splashing" and "jets" are technically distinct. Splash testing uses lower flow rate and wider spray area than jet testing. IP44 is fine for rain that isn't wind-driven directly onto the fitting, but struggles with hose spray or horizontal driving rain.
| Rating | Solids | Water | Typical UK Use |
|---|---|---|---|
| IP20 | 12.5mm+ (finger-proof) | None | Indoor domestic (living room, bedroom) |
| IP21 / IP22 | 12.5mm+ | Vertical / 15° dripping | Indoor with minor condensation |
| IP44 | 1mm+ | Splashing | Bathroom Z1-Z2, porch, under-eave |
| IP54 | Dust-protected (limited ingress) | Splashing | Dusty workshop, loft, agricultural |
| IP55 | Dust-protected | Water jets | Outdoor EV wallbox (BS 7671 S722 compliant) |
| IP65 | Dust-tight | Water jets | Exposed outdoor (garden lights, CCTV) |
Decision rule: IP44 for sheltered outdoor (under a roof or canopy) and bathroom zones. IP54/IP55 for dusty or commercial damp locations. IP65 for any fitting directly exposed to the weather. Using IP44 outdoors without shelter is the single most common UK installation mistake.
BS 7671 Section 701 divides bathrooms into four zones by proximity to bath/shower, each with a minimum IP rating. IP44 satisfies Zones 1 and 2, which cover the vast majority of bathroom electrical installations.
| Zone | Location | Minimum IP | IP44 acceptable? | Typical equipment |
|---|---|---|---|---|
| Zone 0 | Inside bath or shower | IPX7 | No — needs IPX7 | 12V SELV lighting only |
| Zone 1 | Above bath/shower to 2.25m, or 1.2m from shower head | IPX4 (IPX5 if jets used) | Yes — IP44 ✓ | Ceiling downlights, shower lights, extractor fans |
| Zone 2 | 0.6m beyond Zone 1 boundary | IPX4 | Yes — IP44 ✓ | Wall lights, shaver sockets, downlights |
| Outside Zones | Rest of the bathroom | IP20 (IPX4 recommended) | Yes — IP44 ✓ | Extractor fan timer, switches outside zones |
BS 7671 Amendment 2 note: 13A sockets are still NOT allowed in bathroom Zones 0, 1, or 2. They must be outside all zones, ideally 3m from the Zone 1 boundary. Shaver sockets (BS EN 61558-2-5 with isolating transformer) are permitted in Zone 2 or beyond. Additional protection via a 30mA RCD is required for all bathroom circuits.
Spec: Four Aurora EFD Pro IP65 fire-rated LED downlights in a 2.2m x 3m bathroom. One directly above the shower (Zone 1), one above the bath (Zone 1), two within 0.6m of the shower (Zone 2). Fed from a 6A lighting circuit, 30mA RCD protected, supplementary bonding to the radiator and metal pipework.
Why IP65 (not IP44): BS 7671 minimum is IP44 but most UK trade installers specify IP65 for bathroom downlights because of the small cost premium (~£3-5 per fitting) and the cleanability benefit. IP44 is fine and fully compliant — this is an overspec judgement call.
Spec: Lutec LED wall lantern IP44 mounted 2.1m high inside a 1.2m deep porch. Fed from a spur off the lighting circuit via a 1.5mm² T&E cable. 6A fuse protection; PIR overrides manual switch. Supply from the house consumer unit.
Why IP44 is adequate: The porch roof and sidewalls block direct rainfall. Wind-driven spray under heavy conditions might hit the lantern, but the splashing water rating covers this. IP65 would work but is unnecessary overspec for sheltered porches.
Spec: BG Weatherproof 13A single socket IP44 mounted under the eaves at 2.8m high for seasonal outdoor lights. Fed from a spur off the ring circuit via a 2.5mm² T&E cable, 30mA RCD protected at the consumer unit.
Edge case: Under deep eaves with no wind-driven rain, IP44 is fine. If the socket is under a shallow eave or close to the roof edge, consider IP65 to allow for occasional sideways spray. Most installers default to IP55 or IP65 for outdoor sockets as a safety margin even when BS 7671 accepts IP44.
Complete IP00 to IP69K reference chart with IEC 60529 decoding.
The standard fully-exposed outdoor spec (gardens, CCTV, EV wallboxes).
Dust-tight + 1m temporary immersion — ground-level and flood-prone use.
Cable size, MCB, and BS 7671 Section 701 compliance for bathrooms.
Max Zs values, diversity factors, cable ratings, voltage drop — one printable page. Plus occasional emails with calculator updates and useful tips.
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