IP66 vs IP44: What Rating Do You Need for Outdoor Sockets?

If you've started shopping for outdoor sockets or extension leads, you'll have noticed every product lists an "IP rating" — IP44, IP66, sometimes IP68. These aren't just marketing numbers; they're a formal standard that tells you exactly how much protection a product offers against dust and water. Picking the wrong one is one of the most common (and riskiest) mistakes people make when setting up outdoor power. Here's how to get it right.

What the numbers actually mean

IP stands for Ingress Protection, and the rating is always two digits:

• First digit (0–6) – protection against solid objects, from large debris down to fine dust
• Second digit (0–9) – protection against moisture, from light dripping up to full submersion

So when you see IP66, that breaks down as:

• 6 – fully dust-tight, no ingress at all
• 6 – protected against powerful water jets from any direction (think heavy rain driven by wind, or a jet wash nearby)

And IP44:

• 4 – protected against solid objects larger than 1mm (tools, wires, small debris)
• 4 – protected against water splashes from any direction, but not direct jets or heavy rain

IP44 vs IP66: the practical difference

This is the part that actually matters for your buying decision:

IP44 is suitable for:

• Covered patios, gazebos, or pergolas where the socket is sheltered from direct rain
• Areas that might get splashed but won't face driving rain or standing water
• Semi-outdoor spaces like a covered porch

IP66 is suitable for:

• Fully exposed outdoor locations — open gardens, decking, anywhere rain hits directly
• Anywhere near a hose, pressure washer, or sprinkler system
• Permanent outdoor installations that need to handle a UK winter
• Anywhere wind-driven rain is a realistic possibility (which, in the UK, is most places)

A simple rule of thumb: if it's genuinely outdoors and exposed to the weather, go IP66. IP44 is only appropriate when there's real physical shelter above and around the socket.

Why this isn't just a "nice to have"

Water ingress into an electrical socket isn't a minor inconvenience — it's a shock and fire hazard. An under-rated socket left exposed to weather it isn't built for can fail, corrode, or become dangerous well before you'd expect. This is also why combining the right IP rating with RCD protection matters: the IP rating stops water getting in, and the RCD is your backup, cutting power instantly if a fault does occur.

What about IP68?

You'll occasionally see IP68 on components like cable glands rather than full sockets — this means protection against continuous submersion, not just heavy rain. It's typically used for cable entry points and connectors rather than the socket unit itself, where the priority is preventing water from tracking in along the cable rather than surviving underwater.

Quick decision guide

The bottom line

IP44 has its place for sheltered, semi-outdoor spots, but for anything genuinely exposed to UK weather, IP66 is the standard worth insisting on. Browse our IP66 rated armoured extension leads and outdoor sockets built to handle the UK climate properly.