What has the voltage got to do with anything?
You are telling me that Ohm's law only applies at certain voltages?
Power loss is proportional to the square of current.
What has the voltage got to do with anything?
You are telling me that Ohm's law only applies at certain voltages?
You're not considering power. Low-voltage loads must draw more current for the same power, and this high current exacerbates the effect of cable resitance.What has the voltage got to do with anything?
You are telling me that Ohm's law only applies at certain voltages?
You're not considering power. Low-voltage loads must draw more current for the same power, and this high current exacerbates the effect of cable resitance.
A 60 Watt load draws 5 amps at 12 V. That 5 amps through cable resistance of 0.2 ohms = 1 Volt. 12 V - 1 volt = 11 volts. A loss of 8%
Raise the supply voltage. Now a 60 W load draws 0.25 A at 240 V. That 0.25 A through 0.2 ohms creates a drop of 0.05 Volts, which is negligible.
Ohm's Law still applies at any voltage, but you have to consider the full picture.
(and I wish AC was the same as DC, because then I'd never have had to learn phasor analysis...)
Power loss is proportional to the square of current.
Maybe read above, where I covered that? Just a suggestion.
Albeit irrelevant here as tthe suggestion is/was that 12VAC and 12VDC obey Ohm's Law differently.
No, he isn't. AS he, and you both said, that 12V would lose around 1 Volt over a 5m length of cable. That's >8%. It's significant, in the scheme of a 12V system.Maybe read above, where I covered that? Just a suggestion.
Albeit irrelevant here as tthe suggestion is/was that 12VAC and 12VDC obey Ohm's Law differently.
Come come Sue, everybody here knows that Vinny is the only person on here with a science or engineering qualification, and that only he knows the answer to anything with any remotely scientific context.You're doing that thing you do, again, of assuming nobody but you has a scooby about anything.
No, he isn't. AS he, and you both said, that 12V would lose around 1 Volt over a 5m length of cable. That's >8%. It's significant, in the scheme of a 12V system.
You're doing that thing you do, again, of assuming nobody but you has a scooby about anything.
That wasn't the statement that was made. The statement about AC was that the OP might be better off using an AC inverter off their 12V battery. No mention of voltage. You just assumed 12VAC rather than DC, so you're not immune to inferring rather than reading what is written, yourself.I will say again - actually READ what is posted, do not make it up as you go along.
The statement was made that AC is better than DC becaiuse DC voltage drops. That is total horse droppings, no more, no less.
READ EVERYTHING, not selected twadddle.
My exact words were "12V DC doesn't travel far", and that's true as soon as you draw any kind of current.I will say again - actually READ what is posted, do not make it up as you go along.
The statement was made that AC is better than DC becaiuse DC voltage drops. That is total horse droppings, no more, no less.
READ EVERYTHING, not selected twadddle.
But I like itCome on guys its only Rock & Roll
The voltage has a great deal to do with it.What has the voltage got to do with anything?
You are telling me that Ohm's law only applies at certain voltages?