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ac electrical question
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<blockquote data-quote="patooyee" data-source="post: 386432" data-attributes="member: 483"><p>This statement seems illogical to my uneducated brain. They are jumped together 5 feet above the meters by the power company. (One line coming in that breaks out to 3 meters on the wall.) Can you please explain how jumping them back together further down the line = transformer destruction? To me this seems akin to using 2 smaller wires going from an alternator to a battery instead of one big one. Yes, its inefficient but sometimes its the only option.</p><p></p><p>As for answer #1, the service comes in at 3 lines (One 120v, another 120v, and a ground) to a pole that goes down the building exterior wall that goes to a switch. The 3 lines then split off into 9 smaller lines from the switch to the 3 meters, only one of which is in use right now. (The one in use is mine, another is for the aforementioned office that will likely never be used again, and the third for a small store that went out of business a while back and is shut off due to non payment.) From each meter the lines go to a 3-gang 100-amp fuse box and from there to the individual panels. A power company engineer came out and looked at the main line going to our pole, which is aluminum, and said that it is capable of much more than 200 amps. If I had to guess what size it was I would say #1. But the line going from my fuse box to my breaker box, which is at least a 50 foot run, is small-ish copper stuff. What I think you are eluding to in suggestion #1 is that I could replace the 100-amp fuses in my fuse panel with something higher and then draw more amps at the panel? Knowing the line that feeds my panel is small-ish though, wouldn't I rather just run my own separate line branching off from the fuse box going to my own small breaker box that was dedicated to the welder? That way I could size my line properly for the welder circuit and not deal with the main breaker line?</p><p></p><p>I guess what we are saying here is that there really isn't anything keeping me from drawing more than 100 amps from the transformer other than the line sizing and the installed fuses. I don't really need 200 amps anyway. In reality 125 is probably plenty. So install 125 amp fuses assuming the line going from the pole to my fuse box is capable of it (Knowing the power engineer already said the main line is.) and rock out assuming I can get the amps to the welder in a safe manner?</p></blockquote><p></p>
[QUOTE="patooyee, post: 386432, member: 483"] This statement seems illogical to my uneducated brain. They are jumped together 5 feet above the meters by the power company. (One line coming in that breaks out to 3 meters on the wall.) Can you please explain how jumping them back together further down the line = transformer destruction? To me this seems akin to using 2 smaller wires going from an alternator to a battery instead of one big one. Yes, its inefficient but sometimes its the only option. As for answer #1, the service comes in at 3 lines (One 120v, another 120v, and a ground) to a pole that goes down the building exterior wall that goes to a switch. The 3 lines then split off into 9 smaller lines from the switch to the 3 meters, only one of which is in use right now. (The one in use is mine, another is for the aforementioned office that will likely never be used again, and the third for a small store that went out of business a while back and is shut off due to non payment.) From each meter the lines go to a 3-gang 100-amp fuse box and from there to the individual panels. A power company engineer came out and looked at the main line going to our pole, which is aluminum, and said that it is capable of much more than 200 amps. If I had to guess what size it was I would say #1. But the line going from my fuse box to my breaker box, which is at least a 50 foot run, is small-ish copper stuff. What I think you are eluding to in suggestion #1 is that I could replace the 100-amp fuses in my fuse panel with something higher and then draw more amps at the panel? Knowing the line that feeds my panel is small-ish though, wouldn't I rather just run my own separate line branching off from the fuse box going to my own small breaker box that was dedicated to the welder? That way I could size my line properly for the welder circuit and not deal with the main breaker line? I guess what we are saying here is that there really isn't anything keeping me from drawing more than 100 amps from the transformer other than the line sizing and the installed fuses. I don't really need 200 amps anyway. In reality 125 is probably plenty. So install 125 amp fuses assuming the line going from the pole to my fuse box is capable of it (Knowing the power engineer already said the main line is.) and rock out assuming I can get the amps to the welder in a safe manner? [/QUOTE]
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