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Wire size argument
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<blockquote data-quote="Innovative:Cory" data-source="post: 6150225" data-attributes="member: 589885"><p>On the amperage is amperage comment....</p><p></p><p>20amps of draw at 12.6 volt = 252 Watts of power @ 100% efficiency</p><p></p><p>20amps of draw at 110 volt = 2200 Watts of power @ 100% efficiency</p><p></p><p>Yes the amperage remains the same but the power output differs... on the back of almost every electronic device ment for use on A/C has a label (UL or whatever) that lists power consumption of the device...</p><p></p><p>For instance the monitor on this computer is rated at 1.5amp for 110 volt...so it basically equivalent to 165 watts of power consumption...</p><p></p><p>Comparing AC to DC is apples to oranges....wire gauge can (and IS) smaller because you have a higher voltage to work with...there for same amout of power is produced with less amperage...</p><p></p><p>So lets go back to my first equations...</p><p></p><p>20amps @12.6v= 252</p><p></p><p>20amps @110v=2200</p><p></p><p>2200/12.6v=174.60317amps to do the same job on a 12.6v system</p><p></p><p>252/110v=2.290909amps to do the same job on a 110v system....ac or dc....</p><p></p><p>Ohm's laws are law regardless of what type of voltage you are dealing with....</p><p></p><p>There are however, many more points you can factor in on differences between AC and DC... but to get the power you need in DC in a car...you have to have the larger size wire....for the home you just really dont run into it...</p><p></p><p>I have never ran into a house that has only 1 run of 16/2 into a room....if so its for maybe one outlet...but come on...you will almost always have several runs going into a singe breaker (run to each outlet, run to ceiling fans, etc etc)...</p><p></p><p>Usually the biggest wire you will find in a typical home is 12/3 for electric ranges/ovens, furnances, hot water heaters any major appliance that requires a LOT of power, or dual phase power... other than that most homes are just 14/2, 16/2 ...also depends on codes...</p><p></p><p>Less amperage on the voltage equals less heat build up on the wire......</p></blockquote><p></p>
[QUOTE="Innovative:Cory, post: 6150225, member: 589885"] On the amperage is amperage comment.... 20amps of draw at 12.6 volt = 252 Watts of power @ 100% efficiency 20amps of draw at 110 volt = 2200 Watts of power @ 100% efficiency Yes the amperage remains the same but the power output differs... on the back of almost every electronic device ment for use on A/C has a label (UL or whatever) that lists power consumption of the device... For instance the monitor on this computer is rated at 1.5amp for 110 volt...so it basically equivalent to 165 watts of power consumption... Comparing AC to DC is apples to oranges....wire gauge can (and IS) smaller because you have a higher voltage to work with...there for same amout of power is produced with less amperage... So lets go back to my first equations... 20amps @12.6v= 252 20amps @110v=2200 2200/12.6v=174.60317amps to do the same job on a 12.6v system 252/110v=2.290909amps to do the same job on a 110v system....ac or dc.... Ohm's laws are law regardless of what type of voltage you are dealing with.... There are however, many more points you can factor in on differences between AC and DC... but to get the power you need in DC in a car...you have to have the larger size wire....for the home you just really dont run into it... I have never ran into a house that has only 1 run of 16/2 into a room....if so its for maybe one outlet...but come on...you will almost always have several runs going into a singe breaker (run to each outlet, run to ceiling fans, etc etc)... Usually the biggest wire you will find in a typical home is 12/3 for electric ranges/ovens, furnances, hot water heaters any major appliance that requires a LOT of power, or dual phase power... other than that most homes are just 14/2, 16/2 ...also depends on codes... Less amperage on the voltage equals less heat build up on the wire...... [/QUOTE]
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