Busbar Question

[dj2109]

Can you add multiple connections to the same post on a busbar such as this one:

https://www.amazon.com/Fastronix-Pow...6847768&sr=8-6

Thanks

[JDSquared]

That's kind of what they're for. Helps keep everything organized and clean that way. Watch the total amps they're rated for.

[kazetsukai]

Originally Posted by dj2109

Can you add multiple connections to the same post on a busbar such as this one:

https://www.amazon.com/Fastronix-Pow...6847768&sr=8-6

Thanks

Yes, you can. Just be sure to stay within the current rating of your bus bars, and organize wiring in a safe manner.



Perhaps unrelated: The linked bar seems to be rated to 250A, I'm skeptical. I had 100A Blue Sea bars that were quite a bit more beefy than those. I have the Fastronix screw terminal bar in the shorty and I wouldn't want more than 60Aish going over that little guy.



If you are really pushing around 200A over something like that, check the temperature of the bar during heavy loads. If it is heating up at all its underrated for the job.

[Danjo]

Yep. Make sure positive/hot side is fused.

[dj2109]

Thanks for your replies.

Is this true with a negative busbar too?

[Danjo]

The general rule is to never exceed 80% ampacity in any component.

For DC a typical configuration would use a busbar for the termination point of the negative conductors. The busbar would then be Connected to the frame of the bus.

You wouldn’t fuse the negative conductors, just the positive.

For high ampacity loads/large conductors use dedicated fuse blocks.

For smaller loads, like 20A or less, use a fuse block that has room for multiple circuits.

Blue Sea Systems sells well made fuse blocks and bus bars.