Installing 12V port bank. Can use my inflator? By olivertwisted (Read 1,129 times)

[olivertwisted]

 I'm installing this bank of ports. They will each be fused ...




... and I need to check my assessment of whether my tire inflator can be used considering my battery?
MY BATTERY SPECS
MY INFLATOR SPECS



I calculated HERE and it SEEMS that at 9 mins/.15 hours operation time, I'd be safe to use it using a 15A fuse ?
I noticed that the specs for the inflator state " Max. Current: can draw up to 14 amps (if vehicle allows)" < Highlight is mine.

What say you ?

[cyborg]

I think it would work fine,,, one caveat,,, engine running

[olivertwisted]

I agree. The 15A fuse on that port , is appropriate, yes ?

[cyborg]

Si señorita

[olivertwisted]

Lol-io! Gracias!
Extra thanks too. I know we've had ya workin' overtime here lately

[richardv]

I recently used a small 12V compressor to inflate the bicycle tires. The extension cord had a 10 amp fuse and it blew when I reached 45 psi. I replaced it with a 12 amp and got to 50 psi. By the way this was connected to my heavy duty truck battery and heavy duty outlet.

[olivertwisted]

richardv Hmmm.... My inflator is rated @ 14A. Hopefully, I can trust the calculator above for my battery's sake. I don't mind blowing fuses, just don't want a dangerous situation or to hurt the equipment.I'm starting to second guess though, about the fuse. Do I need a fuse that is rated lower than, as opposed to higher than the rating of the equipment attached ? If not, help clarify my thinking?

[richardv]

If it's rated at 14 I would definitely go with a 15 amp. Mine may not have been made to go to 50 psi were it needs a 15 amp.

This is mine, from WalMart;



Sorry it's not here so I can't check it.

[olivertwisted]

Thanks richardv . Of course, looking too much on the interwebses is getting me so much conflicting info that, I got to thinking that I want the fuse to blow before 15 amps get to a 14A component. I do wish I had a confident understanding of electrical principles.

[cyborg]

You need a fuse rated "bigger" than the draw in amps of the component,,,every time or you will pop fuses left right and center,,,you won't even have to pull your hair out,,,,it will just fall out,,,I had a crappy ill fitting glass tube 10 amp main in my Stella ,,,clipped that out of the line put a blade style holder in with a 15amp ,,,end of problems

[olivertwisted]

LOL! I have NO doubt NOW since, ya say so. I got ya. I was previously confused by info leading me to belive that I should be fusing the secondary side as opposed to the primary side of the wire. I thinks, me gots it now . Thanks! cyborg
 I do remember that you recommended (And I took it) to replace my glass fuse at the battery.

[thecableguy]

I'll throw my 2 cents in to confuse the matter further... You always want to use a fuse slightly larger than your expected maximum load. And smaller than the current rating of the wire you are using.

You don't want the fuse to blow under normal loads, and you want it to blow before the wires start self-destructing. This chart shows about where they will fail...

[olivertwisted]

Thank you much ! thecableguy .
Yesterday, I had gone out on my scoot to get 12 awg wire ( after having looked at a chart on safe amp ratings for wires, much like the one you post), and a fuse box. I had a 20A relay in my toolbox from way back that, I'll put inline with a switched live-wire instead of using a toggle too. I'll use the 15A fuse.

[richardv]

Hope your getting the hang of it. The old cigar light sockets were fused at 7.5 and a compressor would blow that in a flash and if you put in a bigger fuse the wire would "let out smoke".

[jct842]

There is always the double bullet style connectors that you get at hobby shops for the high out put lithium batteries used in model helicopters/planes/boats/cars. Some come with at least #12 wire rated 50 amps. the + and - terminals are opposite to prevent crossing polarity.

here are some that do not ccome with the insulators but are even higher rated. would be great to put different ends on a battery charger.

www.hobbyking.com/hobbyking/store/__43953__6mm_RCPROPLUS_Supra_X_Gold_Bullet_Connectors_10_pairs_.html