I've got a couple relays lying around and I'd like to use them for my efan mod. Problem is, I don't know what they're rated for and google is of no help.

foab-14b192-aa

they've been pulled from ford products, around 2000-2005.

 

They would be 20/30amp most likely, you can tell amp rating by the width if the LOAD spades, 1/4" wide are 30amp, most common Ford relays.

When you get up to 60-80amps the LOAD spades are quite wide, easy to see the difference just by looking.

Just google 70 amp relays and you will see the difference, they have "normal" size Coil spades and much wider LOAD spades

Example here: http://www.ebay.com/itm/5X-CAR-VEHIC...-/172194319624

You can easily see the difference in spade width


And just a heads up for E-fans, they can have a 30amp rating but a startup rating of 60amp, so watch out for that

 

Ah, thanks. Sounds like I should probably get something heavier duty.

 

Well depends on the E-fan motor(s) you use of course, get the specs.

And fusible links are good to use instead of fuses when there might be high amps temporarily on startup of a device, which is why they are commonly used with alternators.

Or "slow blow" fuses, they can take a little heat, like a fusible link, before separating.

 

I'll look into those. Probably not a bad idea to use at least one.

For fun, I took my load tester out of it's box and pulled 100 amps through one of these relays. It took it like a champ. Even held it for 2-3 seconds and it didn't melt, explode, smoke, or even smell. These relays are champs.

And yeah, once I pull the fans I'll get their part numbers and research 'em. Thanks for sharing your wealth of knowledge :)

 

Well these are not circuit breakers so will handle as many AMPs as you want until they don't..................
The don't happens when the contacts and plastic starts to melt.

Cheap high amp relay is an old Ford Starter relay,(starter solenoid) the old fender mounted units.

 

If I can find any of those in the yard when I grab the fan, I'll grab 'em.