Fluke 9040 User Manual - Page 9

Phase Rotation Indicator Symbols Symbols The following symbols appear on the 9040 or in this manual. Table 1. Symbols W Risk of Danger. Important information. See manual. J Earth ground. X Hazardous voltage. Risk of electric shock. T Double Insulated. P Conforms to requirements of European Union. ) Conforms to relevant Canadian Standards Association directives. CAT II CAT II equipment is designed to protect against transients from energy-consuming equipment supplied from the fixed installation, such as TVs, PCs, portable tools, and other household appliances. CAT III CAT III equipment is designed to protect against transients in equipment in fixedequipment installations, such as distribution panels, feeders and short branch circuits, and lighting systems in large buildings. CAT IV CAT IV equipment is designed to protect against transients from the primary supply level, such as an electricity meter or an overhead or underground utility service. 5