Product SafetyThe base internationally recognized product safety standard for Information Technology Equipment (ITE), such as computer systems, printers and monitors, IEC 60950 provides design and testing requirements for safe use of the equipment. Designing products to this standard reduces the risk of hazards from electrical, thermal, mechanical, chemical and radiation conditions.
Safety standards appropriate to the category of equipment are used for the designing and testing of non-Information Technology Equipment.
General product safety information is provided within the Safety Information section of this website. Product-specific safety information which is intended to address a product-specific feature (e.g., wall-mounting brackets) is provided within the documentation shipped with an optional product-specific feature. Note that product safety warnings and cautions for certain components, accessories and peripherals may be provided within the product safety information applicable for the component, accessory and peripheral. Product users should ensure that they have read and are familiar with all product safety information applicable to the use of their systems, components, accessories and peripherals.
Tingle SensationA tingling sensation may be noticed any time a notebook computer AC adapter is connected to the electrical supply and the user touches any exposed metal surface on the computer or any connected devices. This sensation has been known in the electronics industry for many years. The likelihood of occurrence depends on several factors, but the experience may occur on devices that have metal surfaces and (especially) 2-prong AC Adapters.
Some users have asked whether this sensation relates to the safety of the notebook. Please be assured that the electric current on all Dell products have been measured and shown to be well within the safety limits established by national and international safety standards for Information Technology Equipment, UL 60950-1 and IEC 60950-1. If a tingling sensation occurs, it does not present any risk of injury to the user nor is it harmful to the computer itself.
All electrical devices powered by AC Adapters with a two-pronged power cord (without a connected ground wire) may exhibit an electrical potential (voltage) between the exposed metal parts of the device and earth ground. The human body can be thought of as a wire which can conduct electric current. Depending on the conditions of a person's skin -- oily, dry, etc., and the surrounding environment (humidity level, flooring or desk material) -- the body can be more or less conductive. If conditions are right for the human body to be less conductive, such as having dry hands or wearing rubber soled shoes on a carpeted floor, the probability of sensing the tingling (electric current) is reduced. If conditions are right for the human body to be more conductive, such as having wet hands or standing barefoot on a concrete floor, the probability of sensing the tingling (electric current) increases. This phenomenon can even occur with a three prong grounding type power cord if the building supply ground is compromised or inadequate.