Just a quick note Most caravan EHU cable connectors are rate as IP44
"An IP44 rating means that your product will be protected from solid particles that are over 1mm in size and from low velocity sprays of water from every direction." https://www.electricalcounter.co.uk/what-is-ip44
"An IP44 rating means that your product will be protected from solid particles that are over 1mm in size and from low velocity sprays of water from every direction." https://www.electricalcounter.co.uk/what-is-ip44