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Why do you ground to chassis?
Chassis grounding serves the same purpose for electronics as lightning protection does for high voltage power systems. Specifically, to route unwanted and potentially dangerous current away from the system elements and components to prevent circuit operation interruption and damage.
Are planes electrically grounded?
Electronics and electrical systems in airplanes are grounded via the aircraft’s exterior body. When lightning strikes an airplane, the body absorbs the excess electricity due to its highly conductive nature, and it releases the electricity into the atmosphere through the static dischargers.
Why do you need grounding on a chassis?
Chassis grounding is an important part of the ground separation strategy to reduce ground noise. It provides a dedicated return path for the ground current to earth ground. Chassis grounding not only helps in protecting the PCB from surges and ground noise, but it may also act as a shield against EMI.
How do I ground my chassis to Earth?
Connect signal ground to chassis ground via a single point to prevent ground loops. 2. Connect Chassis to Earth Ground . The enclosure should never be left floating even if it’s designated as a chassis ground. If possible, connect the chassis to earth ground so that excess current can be safely channeled to earth.
Is the chassis ground a stable reference plane?
The chassis ground is a safe and effective path to divert that excess current. Ground is portrayed as a stable reference plane for electronics signals but realistically, it is anything but. All signals need a return path and the ground plane serves as one.
How to avoid ground loops in a chassis?
Each component must be connected to a solid ground plane individually to avoid ground loops. When using a chassis ground, you can avoid ground loops by placing a void in the ground section that connects to the chassis, as shown below. The use of a capacitor provides an AC ground point.