1st Gen Lunchtable Thread - General Discussion

May be a business opportunity here, holy hand sanitizer...hmmm

"The power of christ sanitizes you"

 

Sanitize Your Sins

I'm onto something here

 

So I’m trying to design the auxiliary electrical system for the service van at work with the dual battery system powering the accessories.

I’m going to have a remote switch panel in the cab which sends a low amperage 12v signal to trigger the relay, which then powers the accessory.

Am I correct in fusing the power pin for the relay, instead of fusing the output of the relay?

Also, since I’m sending power from the cab (albeit long amperage) do I need to fuse each switch? Or can I just fuse the entire switch panel

 

@Blue92 @Abeyancer @0xDEADBEEF

 

Should open up your own church

 

Yes on fusing the line side of the relay. You could fuse the load side, but its not standard practice.

As for the other question, I think fusing each switch is overkill if the switch is only to trigger a relay which is fused like stated above.

 

Fuse as close to battery as possible so it "sees" a short anywhere after it. Etc.

 

Got it. I was going to fuse each line of each relay using one of these. And yes, they are just trigger wires.

 

Yeah you're good then.

 

Cool, thank you.

Maybe this is opening up a can of worms... but when would you use a circuit breaker over a fuse? For my dual battery system, the auto charging relay calls for a 100A or so fuse on each positive terminal of the battery. Why a fuse over a CB?

 

Ahhhhhh.

 

It is a can of worms. In industrial controls we have to think about what is called the trip curve of a breaker and how the load will react to it. 9/10 times its just easier to use a fuse.

 

Interesting. I also ask because some of our buses use circuit breakers on the system, or fuses.

 

@01x4 @Wulf

https://www.instagram.com/p/CgkN0vCJO84/?igshid=MDJmNzVkMjY=

 

Haha I almost grabbed that one instead

 

Good question. Generally you will see both in series in things that really matter, but for a car just chose whatever is more convenient. I have a 200A CB on mine and a 100A fuse down the line.
Fuses can be slower.
Not saying this is how it will happen, but if I have a 100A load for 3 seconds and a 200A spike for 0.1sec, the fuse could be fine and the CB will trip.

 

Religion is big business!

 

@Kwikvette @eon_blue

https://www.instagram.com/reel/Cgpg5LFDKcO/?igshid=MDJmNzVkMjY=