National Instruments SCB-68 - Manual (Page 23)

Chapter 1 Introduction
© National Instruments Corporation 1-13 SCB-68 Shielded Connector Block User Manual
installation, and equipment for industrial use, such as stationary
motors with a permanent connection to the building/fixed installation.
• Installation Category IV is for measurements performed at the source
of the low-voltage (<1,000 V) installation.
Examples of Installation Category IV are electric meters, and
measurements on primary overcurrent protection devices and
ripple-control units.
Below is a diagram of a sample installation.