Tektronix PSPL2600C User Manual page 32

Compliance information
Measurement and
overvoltage category
descriptions
Mains overvoltage
category rating
18
Measurement terminals on this product may be rated for measuring mains voltages
from one or more of the following categories (see specific ratings marked on
the product and in the manual).
Category II. Circuits directly connected to the building wiring at utilization
points (socket outlets and similar points).
Category III. In the building wiring and distribution system.
Category IV. At the source of the electrical supply to the building.
NOTE.
Only mains power supply circuits have an over voltage category rating.
Only measurement circuits have a measurement category rating. Other circuits
within the product do not have either rating.
Overvoltage category II (as defined in IEC 61010-1).
Tektronix PSPL2600C Pulse Generator User Manual