Distance between eyelets and eyelet to hardware?

[nuke]

I hand made some eyelet boards for a project of my own. One of my B+ eyelets is a bit close to the nut that holds down the fiber board, so I'm going to probably make a new board and re-think my layout a bit. I think there's plenty of dielectric, but I'm more concerned about noodling around with a test probe and accidentally shorting the high-tension to the hardware.

So, that brings up a question, just how much distance is necessary between eyelets on vulcanized fiberboard at say, 500v? What should be the keep-out distance from eyelet to edge, and eyelet to attaching hardware?

[Kagliostro]

You can save the Board and use It as Is if you use dielectric mounting

Someting like this, Ceramic or Nylon

isolierstuetze-beidseitig-innengewinde.png

K

[nuke]

Beat you to it.

Went by the hardware store and got a few #6-32 nylon nuts to deal with my immediate concerns. It will do the trick for now. If I decide to make this build more permanent, I'll re-do the board a little better.

It would be good to figure out some rules for eyelet board layout, minimum distances, keep out areas, etc.

I've gotten used to this in circuit board layout software.

[jabguit]

For male threaded standoffs:
https://www.mcmaster.com/94905A007/

For female threaded standoffs:
https://www.mcmaster.com/94735A727/

[martin manning]

With a metal standoff you could use nylon screws and eliminate any risk of grounding, but if the probe tip isn't big enough to bridge the gap you're safe. Electrical grade fiberboard that conforms to Mil-I-695 has dielectric strength of 400V/mil.

[chief mushroom cloud]

It would be good to figure out some rules for eyelet board layout, minimum distances, keep out areas, etc.

I've gotten used to this in circuit board layout software.

If that is the case, you can use rules for 'A6' under 'Min Conductor Spacing' tab in this tool.
https://saturnpcb.com/saturn-pcb-toolkit/

[R.G.]

I would say it's the width of a misguided or slipped tool, such as a ground clip, screwdriver or nut driver. Imagine the effect of one of those slipping or being misaligned, and provide for it.

For eyelet to eyelet, it's probably the width of a solder ball or thread. A reasonable rule of thumb would be one eyelet width between eyelets. You can go smaller, down to trace spacing for B+, but this could be a difficult soldering job.