@@jamieblatantsparky doesn't matter really, we all learn from others along the way if you want to get better, bet you guy that did it did not realise how significant DC was going to become.
So this is the reason we cant we cant use DC to power all of our appliances in our homes ? We need higher voltage to deliver power at lower current because coppper is expensive. So it is impractical to switch DC at 220v using normal switches because the contacts will quickly deteriorate and also cause fire hazard ?
It isnt the appliances, they could easily be designed to use DC. The problem is the transmission of DC over long distances. It becomes way more costly. But you could theoretically deliver power to a house with AC, then have one central transformer that all the household appliances (designed for DC) plug into for a DC only home.
AC is used mostly for distribution reasons - high voltage is needed to reduce losses on long lines. You can easily change voltage with AC, using transformers. Doing rhe same thing with DC requires high power semiconductor components, which weren't available until relatively recently.
This isn't the primary reason. The main reason the grid is primarily AC is because until relatively recently we didn't have the technology to convert DC voltages up or down easily and now we're kinda stuck with the AC grid because it would be way too expensive to convert the whole grid to DC The other reason is there really isn't a big advantage to DC in the home as opposed to AC. Even at 120v in the NA, DC would still be a shock hazard and it's much cheaper to provide AC then let appliances that want DC covert it than it would be to do the opposite, and there are still quite a lot of AC appliances in the household, even some electronic devices need AC
Arcs ionises air and create a conductive path. The more current you have, the hotter you will be and you will then be able to sustain the ionization for much longer. On the other hand, AC current goes through 0 regularly, cooling the air back to resistive properties. And here the distance matters.
Educational and informative.
Very good demo as lots of people dont know the difference particularly with solar
Just to add this is not my video it’s something I acquired for training years ago
@@jamieblatantsparky doesn't matter really, we all learn from others along the way if you want to get better, bet you guy that did it did not realise how significant DC was going to become.
@@jamieblatantsparky Even so, glad you reused it as more educational seeing a practical demo. Do you think it will trip a Hager AFDD?
wow massive arc
So this is the reason we cant we cant use DC to power all of our appliances in our homes ? We need higher voltage to deliver power at lower current because coppper is expensive. So it is impractical to switch DC at 220v using normal switches because the contacts will quickly deteriorate and also cause fire hazard ?
It isnt the appliances, they could easily be designed to use DC. The problem is the transmission of DC over long distances. It becomes way more costly. But you could theoretically deliver power to a house with AC, then have one central transformer that all the household appliances (designed for DC) plug into for a DC only home.
AC is used mostly for distribution reasons - high voltage is needed to reduce losses on long lines. You can easily change voltage with AC, using transformers. Doing rhe same thing with DC requires high power semiconductor components, which weren't available until relatively recently.
This isn't the primary reason. The main reason the grid is primarily AC is because until relatively recently we didn't have the technology to convert DC voltages up or down easily and now we're kinda stuck with the AC grid because it would be way too expensive to convert the whole grid to DC
The other reason is there really isn't a big advantage to DC in the home as opposed to AC. Even at 120v in the NA, DC would still be a shock hazard and it's much cheaper to provide AC then let appliances that want DC covert it than it would be to do the opposite, and there are still quite a lot of AC appliances in the household, even some electronic devices need AC
That aint 220v ac thats about 2000v - 4000v ac (on the basis of arcs, those are about 3-4 cm)
Not really
What counts is the initial jump from the arc
You can sustain a longer arc if there is enough power
Arcs ionises air and create a conductive path. The more current you have, the hotter you will be and you will then be able to sustain the ionization for much longer. On the other hand, AC current goes through 0 regularly, cooling the air back to resistive properties. And here the distance matters.
nuh uh
And? Other than Dr Frankenstein, who's using these blade switches?
This applies to most switches.
@@jerome1lm Not for DC switching it doesn't.
The majority of ac isolators have this arrangement internally
@@jamieblatantsparky But you're showing DC arcing, not AC arcing. How many DC isolators are used under load conditions?
@@VinoVeritas_not many for the reasons shown mostly they would swicth it in the AC side