5
Electrical Symbols
Symbol
Description
Equipment protected throughout by double insulation or
reinforced insulation
Earth (ground)
Warming or Caution
Alternating current
Direct current
Continuity buzzer
Diode
Capacitance
Alternating current or direct current
Caution, possibility of electric shock
Application around and removal from uninsulated hazardous
live conductors is permitted
Complies with European Union Standards
Conforms to UL STD 61010-1, 61010-2-032, 61010-2-033,
Certified to CSA STD C22.2 No. 61010-1, 61010-2-032,
61010-2-033
CAT III
It is applicable to testing and measuring circuits connected
to the distribution part of the building's low-voltage
mains installation
CAT IV
It is applicable to testing and measuring circuits
connected at the source of the building's low-voltage
mains installation
www.calcert.com
1.800.544.2843
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