Locate all exterior outlets. Verify each outlet has an intact weather proof cover. The cover should have a functioning spring loaded closing hinge or a latch to hold the cover closed when not in use. Exterior outlets that have fixtures plugged into them for periods of time should have covers installed that can fully close with fixture cord plugged in. Foam insulation should be installed between cover and box. Torn or missing insulator could allow water infiltration and damage. Exterior outlets should have GFCI protection to help prevent shock hazard when components are plugged in in wet weather or by water locations. Next check to make sure the outlets, covers, and boxes are secure. Movement can cause water infiltration, component failure, and possible shock hazard. Evaluate the outlets for damage and burn marks. Burn marks could indicate arching or possible current overload. Surface mounted electrical wires should be contained in a protective conduit to help prevent accidental damage or sun deterioration. Any issues found should be evaluated and corrected by a licensed and insured electrician.
Do you know how to detect improper materials or installation in supply lines? Improper material installation and use for interior natural/propane gas and water supply