Which IP ratings indicate that a camera is suitable for outdoor use?

The correct choice indicates that the camera has an IP rating of either 66 or 67, which signifies a high level of protection against both dust and water, making it suitable for outdoor use. An IP66 rating means that the device is completely dust-tight and can withstand powerful water jets, while an IP67 rating includes the ability to be submerged in water up to a certain depth for a specific period. This robust protection makes these ratings ideal for outdoor environments, where exposure to moisture, rain, and dust is common.

In contrast, the other options either provide lesser degrees of dust protection or have lower water resistance. For example, ratings like IP54 and IP55 do not offer complete dust tightness or sufficient water resistance for rigorous outdoor conditions. Similarly, IP65 provides good protection but might not withstand heavy water exposure as effectively as IP66 or IP67. Ratings such as IP50 or IP52 offer minimal protection against dust and very limited water resistance, making them unsuitable for outdoor installation where environmental factors are a concern.