Chapter 4: Electrical Installation; Grounding Definition; Ground Specifications - HORNER APG XL10 PRIME OCS User Manual

CHAPTER 4:
NOTE: The datasheets are the first documents to refer to for model-specific information related to
EXL10/XL10 PRIME OCS models such as pin-outs, jumper settings, and other key installation
information. Visit the Horner websites to obtain datasheets, user documentation, and updates.
North America https://hornerautomation.com
Europe
4.1

Grounding Definition

Ground: The term ground is defined as a conductive connection between a circuit or piece of equipment
and the earth. Grounds are fundamentally used to protect an application from harmful interference causing
either physical damage such as by lightning or voltage transients or from circuit disruption often caused by
radio frequency interference (RFI). Grounding is also for the safety of the user.
4.2

Ground Specifications

Ideally, a ground resistance measurement from equipment to earth ground is 0Ω. In reality it typically is
higher. The U.S. National Electrical Code (NEC) states the resistance to ground shall not exceed 25Ω. Horner
APG recommends less than 15Ω resistance from our equipment to ground. Resistance greater than 25Ω can
cause undesirable or harmful interference to the device.
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ELECTRICAL INSTALLATION
http://www.hornerautomation.eu
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