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Posted: 1/20/2021 8:43:27 PM EDT
[#1]
How do you get the smoke back in?
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Posted: 1/20/2021 8:44:44 PM EDT
[#2]
Quote HistoryQuoted: How do you get the smoke back in? A question for the ages! |
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Posted: 1/20/2021 8:45:04 PM EDT
[#3]
Yea. Well enough. Why?
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Posted: 1/20/2021 8:45:15 PM EDT
[#4]
Quote HistoryQuoted: How do you get the smoke back in? Never let it out in the first place! 
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Posted: 1/20/2021 8:46:55 PM EDT
[#5]
What is the formula for the inductance of a square coil, given the number of turns, length of the sides, and width of the coil?
Dimensions are to be in inches and inductance in microhenrys. |
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Posted: 1/20/2021 8:47:06 PM EDT
[#6]
Quote HistoryQuoted: Yea. Well enough. Why? Wye? 3 phase? Parallel connected? |
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Posted: 1/20/2021 8:47:12 PM EDT
[#7]
Can I run a 440 volt 50 amp tool on my 220 volt 200 amp service?
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Posted: 1/20/2021 8:48:38 PM EDT
[#8]
Quote HistoryQuoted: Can I run a 440 volt 50 amp tool on my 220 volt 200 amp service?
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Posted: 1/20/2021 8:49:09 PM EDT
[#9]
Quote HistoryQuoted: Never let it out in the first place! Quote HistoryQuoted: Quoted: How do you get the smoke back in? Never let it out in the first place! Well, what about if its already out? I got most of it trapped in a zip lock bag. If you can put lightning in a jar, there should be a way to put the smoke back in. |
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Posted: 1/20/2021 8:50:38 PM EDT
[#10]
Quote HistoryQuoted: What is the formula for the inductance of a square coil, given the number of turns, length of the sides, and width of the coil? Dimensions are to be in inches and inductance in microhenrys. Single layer, multi-layer, Fe core? |
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Posted: 1/20/2021 8:51:34 PM EDT
[#11]
Quote HistoryQuoted: Can I run a 440 volt 50 amp tool on my 220 volt 200 amp service? At a reduced rate! |
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Posted: 1/20/2021 8:53:41 PM EDT
[#12]
Quoted: What do you want to know? How your home's single phase service works? Why single phase motors sometimes need capacitors? Why GFCI's don't need a ground conductor? I’m in for grid/substation questions. |
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Posted: 1/20/2021 8:53:50 PM EDT
[#13]
What happens during a brownout?
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Posted: 1/20/2021 8:55:01 PM EDT
[#14]
Quote HistoryQuoted: Sure! For how long though is the question Quote HistoryQuoted: Quoted: Can I run a 440 volt 50 amp tool on my 220 volt 200 amp service? Why are the walls and they grey box on the wall smoking?
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Posted: 1/20/2021 8:56:09 PM EDT
[#15]
Quote HistoryQuoted: I’m in for grid/substation questions. Quote HistoryQuoted: Quoted: What do you want to know? How your home's single phase service works? Why single phase motors sometimes need capacitors? Why GFCI's don't need a ground conductor? I’m in for grid/substation questions. What happens if a wavetrap explodes? |
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Posted: 1/20/2021 8:57:14 PM EDT
[#16]
Funny you should ask.
We have local prepper friends who have bought into the notion that there's 'free' electricity floating around in the ground and if you just build the proper tools to extract it, you can power your house with 'free' energy. You know, sort of like how as kids we lit up a lightbulb with a potato - but they have bought into the idea that you can do this on a household level. My wife was amazed by this (I wasn't there when it was discussed) and I had to explain to her that yes, there's often random bits of current that are 'grounded' into the earth, and once in a blue moon a water line picks up an induction current or something like that, but there's no free electricity just waiting for you to come along and mine it and convert it to some useable voltage/frequency or store it because the actual amount of current in the earth is infinitesimal. You'd have to have something like a transmission line in your yard to build an induction coil and pick up enough current to do anything useful, and you'd probably kill yourself in the process. I, as a non-engineer who worked in the electric utility world for years, intuitively understand that this is absurd. But I don't know how to explain that to my wife. I'd also like to be able to explain the history of the various 'free energy' theories to my wife. Wanna tackle any of that?
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Posted: 1/20/2021 8:58:38 PM EDT
[#17]
Quote HistoryQuoted: What happens if a wavetrap explodes? Line communication gets fucked up due to frequency issues. Then I get a ton of OT to replace it. |
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Posted: 1/20/2021 8:59:57 PM EDT
[#18]
Quote HistoryQuoted: Funny you should ask. We have local prepper friends who have bought into the notion that there's 'free' electricity floating around in the ground and if you just build the proper tools to extract it, you can power your house with 'free' energy. You know, sort of like how as kids we lit up a lightbulb with a potato - but they have bought into the idea that you can do this on a household level. My wife was amazed by this (I wasn't there when it was discussed) and I had to explain to her that yes, there's often random bits of current that are 'grounded' into the earth, and once in a blue moon a water line picks up an induction current or something like that, but there's no free electricity just waiting for you to come along and mine it and convert it to some useable voltage/frequency or store it because the actual amount of current in the earth is infinitesimal. You'd have to have something like a transmission line in your yard to build an induction coil and pick up enough current to do anything useful, and you'd probably kill yourself in the process. I, as a non-engineer who worked in the electric utility world for years, intuitively understand that this is absurd. But I don't know how to explain that to my wife. I'd also like to be able to explain the history of the various 'free energy' theories to my wife. Wanna tackle any of that? Free electricty floating around in the ground is a ground fault. The POCO has the corner on that.......... |
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Posted: 1/20/2021 9:07:42 PM EDT
[#19]
Quote HistoryQuoted: Funny you should ask. We have local prepper friends who have bought into the notion that there's 'free' electricity floating around in the ground and if you just build the proper tools to extract it, you can power your house with 'free' energy. You know, sort of like how as kids we lit up a lightbulb with a potato - but they have bought into the idea that you can do this on a household level. My wife was amazed by this (I wasn't there when it was discussed) and I had to explain to her that yes, there's often random bits of current that are 'grounded' into the earth, and once in a blue moon a water line picks up an induction current or something like that, but there's no free electricity just waiting for you to come along and mine it and convert it to some useable voltage/frequency or store it because the actual amount of current in the earth is infinitesimal. You'd have to have something like a transmission line in your yard to build an induction coil and pick up enough current to do anything useful, and you'd probably kill yourself in the process. I, as a non-engineer who worked in the electric utility world for years, intuitively understand that this is absurd. But I don't know how to explain that to my wife. I'd also like to be able to explain the history of the various 'free energy' theories to my wife. Wanna tackle any of that? I honestly wouldn’t even know where to start dude. Maybe as her why she doesn’t get electrocuted if she walks barefoot on wet grass. Hell I don’t know. |
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Posted: 1/20/2021 9:12:35 PM EDT
[#20]
Quote HistoryQuoted: I honestly wouldn’t even know where to start dude. Maybe as her why she doesn’t get electrocuted if she walks barefoot on wet grass. Hell I don’t know. Quote HistoryQuoted: Quoted: Funny you should ask. We have local prepper friends who have bought into the notion that there's 'free' electricity floating around in the ground and if you just build the proper tools to extract it, you can power your house with 'free' energy. You know, sort of like how as kids we lit up a lightbulb with a potato - but they have bought into the idea that you can do this on a household level. My wife was amazed by this (I wasn't there when it was discussed) and I had to explain to her that yes, there's often random bits of current that are 'grounded' into the earth, and once in a blue moon a water line picks up an induction current or something like that, but there's no free electricity just waiting for you to come along and mine it and convert it to some useable voltage/frequency or store it because the actual amount of current in the earth is infinitesimal. You'd have to have something like a transmission line in your yard to build an induction coil and pick up enough current to do anything useful, and you'd probably kill yourself in the process. I, as a non-engineer who worked in the electric utility world for years, intuitively understand that this is absurd. But I don't know how to explain that to my wife. I'd also like to be able to explain the history of the various 'free energy' theories to my wife. Wanna tackle any of that? I honestly wouldn’t even know where to start dude. Maybe as her why she doesn’t get electrocuted if she walks barefoot on wet grass. Hell I don’t know. No voltage gradient? |
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Posted: 1/20/2021 9:13:44 PM EDT
[#21]
Isn't an "electrical thread" really called a wire?
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Posted: 1/20/2021 9:14:30 PM EDT
[#22]
Quote HistoryQuoted: I honestly wouldn’t even know where to start dude. Maybe as her why she doesn’t get electrocuted if she walks barefoot on wet grass. Hell I don’t know. I think I'm going to try to use the analogy of how you can stop sound by sticking a tuning fork into a rubber band. The rubber band might momentarily move or vibrate or something, but it's infinitesimal, momentary, and not practical to capture. Power diverted into the ground is sort of the same thing. |
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Posted: 1/20/2021 9:14:52 PM EDT
[#23]
Quote HistoryQuoted: Isn't an "electrical thread" really called a wire? you need two conductors to complete the circuit............ |
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Posted: 1/20/2021 9:15:06 PM EDT
[#24]
How can I trust anything you say when you call 'wire' 'electrical thread'???
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Posted: 1/20/2021 9:18:02 PM EDT
[#25]
Quote HistoryQuoted: I think I'm going to try to use the analogy of how you can stop sound by sticking a tuning fork into a rubber band. The rubber band might momentarily move or vibrate or something, but it's infinitesimal, momentary, and not practical to capture. Power diverted into the ground is sort of the same thing. Quote HistoryQuoted: Quoted: I honestly wouldn’t even know where to start dude. Maybe as her why she doesn’t get electrocuted if she walks barefoot on wet grass. Hell I don’t know. I think I'm going to try to use the analogy of how you can stop sound by sticking a tuning fork into a rubber band. The rubber band might momentarily move or vibrate or something, but it's infinitesimal, momentary, and not practical to capture. Power diverted into the ground is sort of the same thing. Power, in the electrical service, emanates from the source (usually transformer) back to the source. The ground is an alternate path back to the source (transformer) |
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Posted: 1/20/2021 9:19:38 PM EDT
[#26]
Quote HistoryQuoted: No voltage gradient? It’s a thing but as you well know certainly not enough to power your home for free. I honestly can’t even wrap my head around people believing that. |
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Posted: 1/20/2021 9:22:27 PM EDT
[#27]
Quote HistoryQuoted: Power, in the electrical service, emnates from the source (usually transformer) back to the source. The ground is an alternate path back to the source (transformer) I get that. My wife probably does not.  I was hoping someone had heard this particular conspiracy theory (that there's energy you can tap into, of course Big Oil doesn't want you to know about it) and could help me explain to my wife that TANSTAAFL. |
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Posted: 1/20/2021 9:28:05 PM EDT
[#28]
Know enough about residential and industrial. Used to test motor control centers.
Im interested in solar. I know the basics but not going to dive into it until I know all about it as the setup is expensive. |
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Posted: 1/20/2021 9:30:09 PM EDT
[#29]
Quote HistoryQuoted: I get that. My wife probably does not. I was hoping someone had heard this particular conspiracy theory (that there's energy you can tap into, of course Big Oil doesn't want you to know about it) and could help me explain to my wife that TANSTAAFL. Just wait until she learns of the dangers of Dihydrogen Monoxide! http://dhmo.org/ |
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Posted: 1/20/2021 9:32:19 PM EDT
[#30]
Quote HistoryQuoted: What happens during a brownout? You get called out |
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Posted: 1/20/2021 9:34:15 PM EDT
[#31]
Quote HistoryQuoted: You get called out Quote HistoryQuoted: Quoted: What happens during a brownout? You get called out Lol! Yes! |
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Posted: 1/20/2021 9:37:38 PM EDT
[#32]
What happens to ERCOT?
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Posted: 1/20/2021 9:42:56 PM EDT
[#33]
Why did the master electrician who built the house I just bought use THHN in conduit instead of romex? I just assume because he got the wire and conduit from work at a "discount"... But maybe there is a legit reason...
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Posted: 1/20/2021 9:51:23 PM EDT
[#34]
Quote HistoryQuoted: Why did the master electrician who built the house I just bought use THHN in conduit instead of romex? I just assume because he got the wire and conduit from work at a "discount"... But maybe there is a legit reason... I’m a substation electrician not residential but I don’t believe romex is supposed to be ran in conduit. I may be wrong on that we don’t have to follow code. |
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Posted: 1/20/2021 9:57:56 PM EDT
[#35]
Quote HistoryQuoted: I’m in for grid/substation questions. Ooh ooh! Any clue where to find a manual for a circa 1955 MH-1 Pacific Electric breaker? Specifically the timing and measurements for the trip latch? My and my co-workers google fu is weak. All of our manuals have disappeared 
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Posted: 1/20/2021 9:58:36 PM EDT
[#36]
Quote HistoryQuoted: Why did the master electrician who built the house I just bought use THHN in conduit instead of romex? I just assume because he got the wire and conduit from work at a "discount"... But maybe there is a legit reason... Not an electrician, just play one occasionally. But THHN has like a 30% higher ampacity than romex . . . maybe that's why? |
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Posted: 1/20/2021 9:59:51 PM EDT
[#37]
Your favorite way to find the nitrogen leak on a tub that went through 1200 PSI of bottle pressure in the last 30 days? Hot soapy water? Cause that’s where I’m going
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Posted: 1/20/2021 10:02:00 PM EDT
[#38]
Will there be any longterm problems running a 3 phase motor using single phase 220 and a VFD?
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Posted: 1/20/2021 10:04:03 PM EDT
[#39]
Quote HistoryQuoted: Your favorite way to find the nitrogen leak on a tub that went through 1200 PSI of bottle pressure in the last 30 days? Hot soapy water? Cause that’s where I’m going That's the way we do it. Our last mystery leak was in the pressure switches for the alarm. |
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Posted: 1/20/2021 10:18:53 PM EDT
[#40]
Quote HistoryQuoted: Will there be any long term problems running a 3 phase motor using single phase 220 and a VFD? Is motor rated for a vfd? If no then yes you may marginally shorten the life of the motor as the high frequency/voltage transients from the conversion may cause winding failure. The certainly would not stop me from using the motor. |
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Posted: 1/20/2021 10:22:11 PM EDT
[#41]
Quote HistoryQuoted: I’m a substation electrician not residential but I don’t believe romex is supposed to be ran in conduit. I may be wrong on that we don’t have to follow code. Quote HistoryQuoted: Quoted: Why did the master electrician who built the house I just bought use THHN in conduit instead of romex? I just assume because he got the wire and conduit from work at a "discount"... But maybe there is a legit reason... I’m a substation electrician not residential but I don’t believe romex is supposed to be ran in conduit. I may be wrong on that we don’t have to follow code. Not supposed to run romex in conduit. It is designed to be run exposed. |
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Posted: 1/20/2021 10:22:16 PM EDT
[#42]
Anything special you have to do to hook a 480 primary 240/120 split secondary to sub 100kva generator?
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Posted: 1/20/2021 10:30:23 PM EDT
[#43]
How many hydrocoptic marsalvanes in a retro encabulator?
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Posted: 1/20/2021 10:39:01 PM EDT
[#44]
Quote HistoryQuoted: Ooh ooh! Any clue where to find a manual for a circa 1955 MH-1 Pacific Electric breaker? Specifically the timing and measurements for the trip latch? My and my co-workers google fu is weak. All of our manuals have disappeared Quote HistoryQuoted: Quoted: I’m in for grid/substation questions. Ooh ooh! Any clue where to find a manual for a circa 1955 MH-1 Pacific Electric breaker? Specifically the timing and measurements for the trip latch? My and my co-workers google fu is weak. All of our manuals have disappeared Control building hahahaha That sounds like a trial and error type situation sorry dude. |
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Posted: 1/20/2021 10:41:17 PM EDT
[#45]
Quote HistoryQuoted: I think I'm going to try to use the analogy of how you can stop sound by sticking a tuning fork into a rubber band. The rubber band might momentarily move or vibrate or something, but it's infinitesimal, momentary, and not practical to capture. Power diverted into the ground is sort of the same thing. Quote HistoryQuoted: I think I'm going to try to use the analogy of how you can stop sound by sticking a tuning fork into a rubber band. The rubber band might momentarily move or vibrate or something, but it's infinitesimal, momentary, and not practical to capture. Power diverted into the ground is sort of the same thing. Or you can just tell her the truth as it's very easy to understand. It actually depends on where it came from, I'm sure there are people here that know someone who was shocked/killed by cutting into a big ground, or even a ground grid. The clouds and wind moving over the earth are always producing charge in the ground, and when it builds up you get lightning. Then the POCO also has Neutral to Earth Voltage, which is a feature and not a bug until someone gets roasted. Electricity always returns to the source of the power supply (a transformer or substation). ... When electrical current cannot flow through a neutral conductor, due to some type of damage or defect in the circuit, more current will use a path through the earth to return to the power supply. Electric current always flows from a power supply to the equipment that is using it and then back to its source, completing a circuit as it moves along an electrical supply system. Every electrical supply system uses a neutral conductor to return the current to the supply source. In addition, this neutral conductor is grounded. This approach creates a "path of low resistance" for the current to follow in returning to its source. Under normal conditions, when electrical current flows along the grounded neutral conductor, a small portion of the current also flows through the earth. This creates some neutral-to-earth voltage (NEV), a small but measurable amount of voltage at each point where the electrical system is grounded. When damage to the neutral conductor occurs whether caused by a storm, corrosion or a poor connection electric current finds an alternate path to the supply source through the earth. This will result in higher levels of NEV, and can become a source of stray voltage. https://www.wisconsinpublicservice.com/partners/agriculture/stray-voltage/electricity |
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Posted: 1/20/2021 10:44:08 PM EDT
[#46]
Quote HistoryQuoted: Why did the master electrician who built the house I just bought use THHN in conduit instead of romex? I just assume because he got the wire and conduit from work at a "discount"... But maybe there is a legit reason... Probably because he is a commercial electrician so he wired it like a commercial job. I see it quite often. |
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Posted: 1/20/2021 10:47:00 PM EDT
[#47]
Quote HistoryQuoted: Control building hahahaha That sounds like a trial and error type situation sorry dude.
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Posted: 1/20/2021 10:50:19 PM EDT
[#48]
When g/f plugs in hair iron it trips the circuit breaker everytime at different outlets and different breakers.
Outlets in the kitchen are fine. What gives??? 
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Posted: 1/20/2021 10:50:38 PM EDT
[#49]
Why GFCI's don't need a ground conductor?
This is interesting, why not? |
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Posted: 1/20/2021 11:04:09 PM EDT
[#50]
Serious question. Please read carefully, as I have asked 5 electricians today, and answers have been all over the map.
Situation... I have a metal roof on my house. I just mounted a small tripod atop the peak of the roof, to hold a 10’ galvanized pole that will have a 6’ vertical antenna on top of the pole (setting up an HF/VHF/UHF radio shack/room). I put rubber/nylon washers (about 1.5 mm thick) under the tripod legs to waterproof the bolt holes that go through my roof. Most things I read say to ground the coaxial cable to the pole, and to ground the pole to a ground rod. Now, one electrician told me to just run a small #6-#10 insulated wire across the roof to the eave, bend under the soffit, and go down the wall to a ground rod. Another said nearly the same, but to run the wire on 2” ‘insulators’ to keep it off the metal roof. Another said to use bare “lightning wire”, a heavy braided/woven copper wire (un-insulated), and to run it in full contact with the metal roof to the eave, then down the wall to ground rod. He said it would ground the entire roof in case lightning hit the antenna, roof, or nearby. A fourth told me in no uncertain terms not to mount that antenna on my roof, or I would burn my house down. He was adamant about that. The fifth told me I would have to put a grounded lightning rod on every corner of my house if I were to mount the antenna up on the roof. WTF? It seems like electrical physics is a known entity (just not known to me). Why all the different responses? Which is correct? |
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