Battery-inverter cables upgrade

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Fintray
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Re: Battery-inverter cables upgrade

#21

Post by Fintray »

Stinsy wrote: Wed Jan 15, 2025 2:50 pm Interesting. Did you try weighing the cable?

Copper is c. 8.96g/cm³

25mm² * 1m = 250cm³ so the copper alone in a 1m length of 25mm²should weigh 2.24kg.
Shouldn't that be 0.224kg?
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Countrypaul
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Re: Battery-inverter cables upgrade

#22

Post by Countrypaul »

Yep.

Think of it like this, assume copper is 9/cm3 and he thinks he has 250 cm3 so 9x250=2250g oe 2.25kg.

However, 25mm2 is 0.25cm2 so 0.25 x 100 = 25cm3, 9 x 25 = 225g

If it does weigh 2.25kg/m where do you get it? :D
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Stinsy
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Re: Battery-inverter cables upgrade

#23

Post by Stinsy »

Fintray wrote: Wed Jan 15, 2025 4:20 pm
Stinsy wrote: Wed Jan 15, 2025 2:50 pm Interesting. Did you try weighing the cable?

Copper is c. 8.96g/cm³

25mm² * 1m = 250cm³ so the copper alone in a 1m length of 25mm²should weigh 2.24kg.
Shouldn't that be 0.224kg?
I think you're right. There are 100mm² in 1cm²...
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Saladin
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Re: Battery-inverter cables upgrade

#24

Post by Saladin »

K.I.S.S.

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nowty
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Re: Battery-inverter cables upgrade

#25

Post by nowty »

1 metre of 50mm².

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Saladin
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Re: Battery-inverter cables upgrade

#26

Post by Saladin »

How much does the insulating jacket weigh? :pot-stir:

btw that's the "hi-flex" cable Nowty it's 40mm² > 45mm² :on-patrol:

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nowty
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Re: Battery-inverter cables upgrade

#27

Post by nowty »

Saladin wrote: Thu Jan 16, 2025 12:31 am How much does the insulating jacket weigh? :pot-stir:

btw that's the "hi-flex" cable Nowty it's 40mm² > 45mm² :on-patrol:

Dodgey cable dot com linky

PM me for the "I know what you did last Summer" hotline

Free cable or class action lawsuit; you choose...'Split Charge's' defense was "even the NHS buys it!" :roll:
I think your right as my 50mm² hydraulic die would not adequately crimp it, I had to use a 35mm² die but not compress all the way. :facepalm:
However, even 35mm² cable would have been adequate for my upgrade needs anyway. :xx:
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Saladin
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Re: Battery-inverter cables upgrade

#28

Post by Saladin »

The gauge being down is one thing but so is the price hence my acceptance of the back-hander. Sure it's dishonest but it's effin' hard to get honest cable or any at all in a red jacket over 50mm², if the price per gram of copper is fair then ignore the numbers and oversize the oversize is my logic.

Easiest way to tell is push 200A through it and see if the voltage drop is consistent with rated for that gauge, length and voltage. After that if the bonnet bee is bothersome have it tested in an independant lab then choose your adventure from there

I'm sure they've covered their bottoms it took me a month to get compensation. When you look at the data sheet the CSA of their 35mm² is 30mm² when you пr² all the strands (but in reality it's less again), the ampacity is at a reduced duty cycle and the jacket gets thinner every year to help the heat dissipation.

I pulled 10 year old hi-flex outtov a boat and it was noticeably more substantial than the "same gauge" new hi-flex I was replacing it with.

In the grand scheme of things the planet's vibrating...we need tuning forks not cables....
pudding
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Re: Battery-inverter cables upgrade

#29

Post by pudding »

Blimey, this has developed. Ok, so I was thinking of this 50mm cable between inverter and disconnect/connector block - https://www.superlecdirect.com/superlec ... -6381ef50/ Anything wrong with it or problem using this flexible cable?
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Stinsy
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Re: Battery-inverter cables upgrade

#30

Post by Stinsy »

pudding wrote: Thu Jan 16, 2025 8:25 am Blimey, this has developed. Ok, so I was thinking of this 50mm cable between inverter and disconnect/connector block - https://www.superlecdirect.com/superlec ... -6381ef50/ Anything wrong with it or problem using this flexible cable?
Why have you chosen H07RN-F? That is for harsh environments such as outdoors, building sites, or marine applications. Sure it'll do the job but it is the wrong tool for a short run between Disconnect and inverter.

Look for "welding cable".
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