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When installing an outside antenna system, extreme care should be taken to keep from touching such power lines or circuits as contact with them might be fatal. 19. Overloading -Do not overload wall outlets, extension cords, or integral convenience receptacles as this can result in a risk of fire or electric shock. 20. Attachment -Do not use attachments not recommended by the appliance manufacturer as they may cause hazards. 21. Replacement parts -When replacement parts are required, be sure the