Fuse box fried...

[Foxcroft007]

Not load on upfitters. Running 30” Baja single row bar behind grill, 6 rigid d2 cubes a valentine v1 and a dash cam. No draw issues here and certainly when the issue occurred the only things running were v1, dash cam and amber lights in Baja 30”

 

[FordTechOne]

Not load on upfitters. Running 30” Baja single row bar behind grill, 6 rigid d2 cubes a valentine v1 and a dash cam. No draw issues here and certainly when the issue occurred the only things running were v1, dash cam and amber lights in Baja 30”

I thought you said all of those were wired through your upfitter switches?

 

[sixshooter_45]

Speaking of load through the uplifter switches and the Baja Designs 30" light bar, can someone clue me in on why they state 180 watts/12 amps?

Power, (W) = Volts, (V) x Amps, (A)

180W/12V=15A not 12 Amps?

Are the using charging voltage? 180W/14.2V= 12.68?

 

[CoronaRaptor]

Speaking of load through the uplifter switches and the Baja Designs 30" light bar, can someone clue me in on why they state 180 watts/12 amps?

Power, (W) = Volts, (V) x Amps, (A)

180W/12V=15A not 12 Amps?

Are the using charging voltage? 180W/14.2V= 12.68?

Volts is a variable, so is amperage, not constant, only rated constant on a chart.

 

[isis]

Speaking of load through the uplifter switches and the Baja Designs 30" light bar, can someone clue me in on why they state 180 watts/12 amps?

Power, (W) = Volts, (V) x Amps, (A)

180W/12V=15A not 12 Amps?

Are the using charging voltage? 180W/14.2V= 12.68?

Likely. That’s the voltage when you’re driving. 12.8 or more when parked.

 

[isis]

Volts is a variable, so is amperage, not constant, only rated constant on a chart.

Not even close to understanding what you’re saying here. W=VxA is an equation. When you put a number in for any two of them, it will tell you the other using simple math.

 

[CoronaRaptor]

Not even close to understanding what you’re saying here. W=VxA is an equation. When you put a number in for any two of them, it will tell you the other using simple math.

Yes, but 12volts isn't constant, it can fluctuate from 8-15volts and as such the amperage moves up and down. Sorry for not explaining properly. There is also inrush current, but don't want to confuse you more.

 

[sixshooter_45]

Volts is a variable, so is amperage, not constant, only rated constant on a chart.

I understand and agree but that's not the issue, it's when they rate it at 180W/12Amps and when folks see this that don’t understand the relationship they may think it will be fine for the 1st or 2nd switch rated at 15 amps since their stated 12A/15A rated switch is sitting at 80% which would be acceptable, however that's not the case.

You're only going to see 12A at 15V.

I guess I wasn't clear on what I was trying to explain which is my fault since I posted it as a question.

 

[Jakenbake]

I suppose I am having trouble grasping the 80% rule for a circuit.

Take a circuit fused for a certain amount, say 20 amps. If you put a load on it that exceeds the 20 amps will the fuse not blow and protect the circuit? That is assuming the fuse was appropriately selected for the gauge of wire and the length of wire.

Does the issue turn into the fact that it may not present a load high enough to blow the fuse but will generate too much heat to cause an issue? But then again isn’t heat a result of current?

I guess my question is that shouldn’t the fuse on the factory upfitters be sized appropriately to protect the circuit despite whatever load the circuit may see?

Is the 80% more so that you don’t blow a fuse during normal operation rather than for protecting the circuit?

 

[CoronaRaptor]

I understand and agree but that's not the issue, it's when they rate it at 180W/12Amps and when folks see this that don’t understand the relationship they may think it will be fine for the 1st or 2nd switch rated at 15 amps since their stated 12A/15A rated switch is sitting at 80% which would be acceptable, however that's not the case.

You're only going to see 12A at 15V.

I guess I wasn't clear on what I was trying to explain which is my fault since I posted it as a question.

Ah, gotcha, yes, you are correct.