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Guide to electrical safety testing safety is our only focus

Safety Is Our Only Focus Guide to Electrical Safety Testing - - - GENERAL INFORMATION Why Test There are four main reasons why you should safety test your products prior to shipment Safety Ensure that the product is not going to pose a hazard to the end user Quality Detect workmanship defects and prevent faulty components from being installed Cost Control Identify production problems before a product is shipped preventing costly recalls Liability Prevent product liability suits because the responsibility of performing electrical safety tests ultimately rests on the manufacturer NRTLs Nationally Recognized Testing Laboratories set standards outlining tests that must be performed on a product before it ? s considered safe for the consumer market NRTLs implement and enforce electrical safety testing to protect consumers from a potentially fatal electric shock NRTL Examples Underwriters Laboratories UL - United States TUV Rheinland Germany Canadian Standards Association CSA - Canada ETL Intertek - United States and CCC China Compulsory Certification - China NRTL standards dictate that electrical products incorporate two lines of defense to protect the user from electrical shock Insulation Safety Grounds Separates power lines from low voltage circuits n Separates power lines from isolated power supplies Allow dangerous fault currents to return to system ground Enables circuit breakers to open n Isolates input power from the chassis or case of an Safeguards against fire electrical device Protects against damage to electrical equipment Electrical products can be classified according to insulation type Class I Products Terminate in prong line cord line neutral and ground Ground prong connects to product chassis Safety through basic insulation and proper grounding Class II Products Double insulated products Terminate in prong line cord line and neutral Safety through dual layer of insulation arisafety com GENERAL INFORMATION NRTL standards generally specify two separate testing categories Type Test Performed as a laboratory or prototype test Done on sample basis Used to detect defects in product design More rigorous testing Production Line Test Performed on of products on the production line Used to detect manufacturing or workmanship defects As a manufacturer or test operator it ? s up to you to ensure you have the proper knowledge and training to use high voltage equipment Before working with an electrical safety test station you need to make sure you are a qualified operator according to OSHA guidelines Occupational Safety and Health Administration An agency of the United States Department of Labor charged with ensuring safe working conditions as well as enforcing standards and providing workplace training and education OSHA Subpart S osha gov Effects of the electrical current on the human body Current to milliamp Reaction Perception milliamps Slight shock felt startled reaction to milliamps Painful shock and inability to let go to milliamps amps Extremely painful respiratory arrest ventricular fibrillation death possible Cardiac arrest severe burns n These effects are for voltages less than volts Many electrical safety instruments can output voltages in excess of volts which can cause more severe reactions at lower current levels OSHA CFR