How to Choose Wire and Fuse Size | (PREVENT FIRES) BASICS OF WIRE/FUSE SIZE

In this video I teach you how to calculate the correct wire size and amp-rated fuse for each load in your off grid electrical system! After watching this video you will understand the importance of cable and fuse size.

This week, we got the majority of our electrical system connected!

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[MesaMinis]

I learned so much from this video thank you! This is my system I’ve planned for my semi truck.

3000w 48v inverter
3000W/48V=62.5A
62.5A x 1.25%=78amps
Round up to a 80amp fuse
Wire size must Handel 62.5A
Wire: 4awg 120amps max
circuit breaker: 80amps

[tajladkin]

Been watching way to many videos on wiring for my tiny house and this is definitely the best one! Thanks so much ✌🏼

[s.mendez]

With a lithium bank, you might want to replace that breaker with a fuse that has a much higher AIC rating. A Class-T fuse has an AIC of 20, 000. And it's response time is much faster than a thermal breaker. Your videos are awesome and well produced!

[runawayrose]

Thank you for the chart you saved me more aggravation then you'll ever know Bravo!!!

[jasonniggel]

Thanks man, this has been explained to me so many times but I think it will stick with your simple examples!

[urolisa]

After watching you finally prepared to wire my boston whaler 15Ft proyect, thanks

[beboops]

Oh thank you thank you thank you lol. I've been watching videos and trying to get a proper understanding of fuse sizing. I finally got it with your example near the end and the way you worded it. Oof! Ok I think I can finally start sizing my wires and fuses for my solar install! I just finished installing the panels on my roof, so I've been breaking my brain trying to figure out this next step 🙏🏻

[randallprue]

Thanks. That was clear and easy to understand. I enjoy the thorough explanations and elaborations.

[philiolynott]

Have been looking all over to get a good understanding of how breakers are sized! Thanks!

[paddygora]

I have saved this video for reference. Great explanations👍

[svrds]

Hard work put into this one earned a thumbs up and a subscribe... Thanks!

[cmine]

I’m building a very similar setup right now in my sprinter so this was suuuuper helpful

[marisolmedina-gxtf]

Thank you for your education and teaching

[KRPT]

Well made video and a good description - now comes the dreaded part of buying 40 feet of 4 AWG cable.

[omoomoruyi]

Helpful as I'm trying to figure out why mine has fuse cut off on a 24v 280amps lifepo4 batteries.

[whirlwindmgtow]

Fantastic video. Very well done. I learned a ton in just 9 minutes. 👍👍👍

[BlackJacketJones]

i don't understand why i'm finding sources online that give conflicting information about max amps for wire sizes. For example, the link you provide claims that 2/0 wire can handle 330 amps, but i have found at least three other sources that claim 2/0 wire can only handle 175 amps. which is it???

[commandant]

Thanks a lot man, your chart or table or whatever we should name it, abt amps and sizing fuse is really helpful, which I could not find such info with ease in other videos. Thanks again

[MerajTypeBeat]

Clear and concise.

I appreciate you! 🫡💯

[ThePhatWabbit]

Do you size your fuse and wires for an inverter's normal power, or an inverter's surge power?