Question Building Wood Case: Grounding

Jul 21, 2019
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I would like to build my case from wood. I've read as long as screws from the motherboard are not protruding through the case, the power supply will work as the ground. Is that true? And do I need to make sure the screws from the power supply are protruding through the case for it to be grounded? And would the power supply have ground of it is bolted to the ceiling of the case?

All of the blue crossing lines symbolizes wood. Even on top of the motherboard past the GPU on the outside of the case under the GPU fans.

Thank you in advance.


 

Darkbreeze

Titan
Moderator
Grounds are created through the ATX 24 pin connection. The is no need for grounding through the case, and in fact, while many THINK that the motherboard tray/case provides grounds through the standoffs, in reality the holes for the standoffs are intentionally shielded from the actual motherboard. If you look closely at any motherboard you will see that there are no leads or traces running to the area around the standoff holes, so no ground could be provided through those points anyhow.

The case itself, while grounded to the PSU through the PSU mounting screws, is simply a redundant feature and is not further redundant by the motherboard fasteners. In fact, in years past, they used to recommend and supply fiber washers that completely kept the screw from even touching the metal reinforced rings around the standoff holes.

Anybody who says standoffs are a required component to the grounding/earth of the system, doesn't understand how the system works, hasn't been building systems since back when they all came with fiber washers under the screws or took a very close look at the fact that the metal reinforcement around the standoff holes does not extend to including any other part of the motherboard than itself.

In point of fact, there was a time when MANY motherboards were mounted to the motherboard tray using push pin style plastic standoffs that popped through the motherboard standoff holes and rested on a plastic "lip" below the split section of the push pin.


If you are still in doubt, you can always cut away an old case and use the remaining back I/O panel and motherboard tray by themselves, IN the wood chassis, as seen here:

 

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