User’s Manual UT5583 Insulation Resistance Tester
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electronic equipment with protective measures, and any high-voltage and low-
voltage circuits, such as the copier in the office.
CAT II
Primary electrical circuit of the electrical equipment connected to the indoor socket
via the power cord, such as mobile tools, home appliances, etc. Household
appliances, portable tools (e.g. electric drill), household sockets, sockets more than
10 meters away from CAT III circuit or sockets more than 20 meters away from CAT IV
circuit.
CAT III
Primary circuit of large equipment directly connected to the distribution board and
circuit between the distribution board and the socket (three-phase distributor circuit
includes a single commercial lighting circuit). Fixed equipment, such as multi-phase
motor and multi-phase fuse box; lighting equipment and lines inside large buildings;
machine tools and power distribution boards at industrial sites (workshops).
CAT IV
Three-phase public power unit and outdoor power supply line equipment. Equipment
designed to “initial connection”, such as power distribution system of power station,
power instrument, front-end overload protection, and any outdoor transmission line.
Certification
CE indicates a registered trademark of EU
Certification
UKCA indicates a registered trademark of UK
Certification
ETL indicates a registered trademark of Intertek.
Waste
This product complies with the marking requirements of WEEE Directive
(2002/96/EC). This additional label indicates that this electrical / electronic
product must not be discarded in household waste.
EFUP
This environment-friendly use period (EFUP) mark indicates that dangerous
or toxic substances will not leak or cause damage within this indicated time
period. The environment-friendly use period of this product is 40 years,
during which it can be used safely. Upon expiration of this period, it should
enter the recycling system.
Safety Requirements
Warning
