Safety considerations for electric blankets

Electrically heated blankets are judged to be safe from hazards of electric shock and overtemperature if they pass standard tests for current leakage, dielectric strength, and normal and abnormal overheating. Design considerations which affect performance on these tests include the construction of the blanket wired structure, the power rating of the blanket, the type of overtemperature protection used, and the fail-safe characteristics of that protection.