If you are doing any Type of electric arc welding you need to isolate the computer. After you disconnect the battery you need to have the welding ground clamp as close to the weld as possible being sure that there is nothing electrical between the weld area and the ground clamp. If it is TIG welding then you really have to be careful as the high frequency can and will go anywhere.
If you have had scabies, the symptoms could appear within one to four days after being exposed. Mites are most active at night and the most intense itching occurs at night. Telltale symptoms of scabies include intense nighttime itching and a rash.cabies mites can only live for 48 to 72 hours when not in contact with skin. Indirect transmission is more likely when a person has crusted scabies, and the shard fabric has been in direct contact with skin.
  Scabies are usually contagious about 40 days before you know you have them. They die within about 10 hours of being treated and are then no longer contagious. They don't â¦ like to live on fabric and if they can't find a human they will die off on clothes in about 4 days.o be sure a second treatment can be applied  after 2 weeks.    After the mites are killed the itch and rash they caused (an  allergic reaction to their feacies) may take up to 2-6 week to die  down-The treatment works but you don't think it has because the  itch remains-have faith!.