13A sockets are not really the right object if they are going to be splashed or handled by folk with wet hands - to rely on the RCD implies that you accept tripping, and perhaps quite painful shock while it trips, as the 'normal'  safety regime.  Outdoors means different things - a socket in a car port or under an awning my be OK, and fair weather only applications (the gardener never cuts the grass in a storm..) 13A may be all right.  Equally an extension lead in a puddle at a car wash certainly isn't.

BS7909 may be worth a look - not industrial of course, but camps and pop festivals are certainly examples of outdoors and all weather situations.

https://www.hse.gov.uk/electricity/precautions.htm

In wet surroundings, unsuitable equipment can become live and make its surroundings live too. Fuses, circuit-breakers and other devices must be correctly rated for the circuit they protect. Isolators and fuse-box cases should be kept closed and, if possible, locked.

Cables, plugs, sockets and fittings must be robust enough and adequately protected for the working environment. Ensure that machinery has an accessible switch or isolator to cut off the power quickly in an emergency.

Not black and white, but not '13A is always OK' either.

Mike

13A sockets are not really the right object if they are going to be splashed or handled by folk with wet hands - to rely on the RCD implies that you accept tripping, and perhaps quite painful shock while it trips, as the 'normal'  safety regime.  Outdoors means different things - a socket in a car port or under an awning my be OK, and fair weather only applications (the gardener never cuts the grass in a storm..) 13A may be all right.  Equally an extension lead in a puddle at a car wash certainly isn't.

BS7909 may be worth a look - not industrial of course, but camps and pop festivals are certainly examples of outdoors and all weather situations.

https://www.hse.gov.uk/electricity/precautions.htm

In wet surroundings, unsuitable equipment can become live and make its surroundings live too. Fuses, circuit-breakers and other devices must be correctly rated for the circuit they protect. Isolators and fuse-box cases should be kept closed and, if possible, locked.

Cables, plugs, sockets and fittings must be robust enough and adequately protected for the working environment. Ensure that machinery has an accessible switch or isolator to cut off the power quickly in an emergency.

Not black and white, but not '13A is always OK' either.

Mike