IP Code

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Introduction

The IP Code, or "Degrees of protection provided by enclosures", is an international standard which defines the protection again water and dust provided by a device design. The normative international standard is IEC 60529 Ed 2.1:2001, but many countries have their own name/number for an identical standard (e.g. Australian Standard AS 60529—2004).

Protections under the standard are specified by an IP-sw rating, where the first digit of the suffix (s) defines the resistance to solids intrusion, and the second digit of the suffix (w) defines the resistance to water intrusion.

Solid Intrusion

The following levels of resistance to intrusion of solids into the device (laptop internals, in our case) are specified. In our case, hazardous parts refers to any active electrical circuit, even thought the voltages present on any XO are all classified as "low voltage" and considered safe.

Level 0 indicates that no protection is provided.

1 - Hand

The device is protected against access to hazardous parts with the back of a hand. A 5 cm diameter sphere shall be unable to access hazardous parts.

2 - Finger

The device is protected against access to hazardous parts with a finger. A 1.2cm diameter, 8cm long test finger shall be unable to access hazardous parts.

3 - Tool

The device is protected against access to hazardous parts with a tool. A 2.5mm diameter test probe shall be unable to access hazardous parts.

4 - Wire

The device is protected against access to hazardous parts with a wire. A 1.0mm diameter test probe shall be unable to access hazardous parts.

5 - Dust Protected

The standard reads: "Ingress of dust is not totally prevented, but dust shall not penetrate in a quantity to interfere with satisfactory operation of the apparatus or to impair safety"

The device is protected against access to hazardous parts with a wire.

6 - Dust Proof

No ingress of dust is allowed. The device is protected against access to hazardous parts with a wire.

Water Intrusion

The following levels of resistance to intrusion of liquids into the device (laptop internals, in our case) are specified:

1 - Vertically Falling Drops

2 - Falling Drops

3 - Spraying water

4 - Splashing water

5 - Water Jets

6 - Powerful Water Jets

7 - Temporary Immersion

8 - Continuous Immersion