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#1
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Chassis wiring vs. power transmission
I'm learning to interpret the table here (about 1/3 of the way down):
http://www.powerstream.com/Wire_Size.htm What are examples "Chassis wiring" and what is "power transmission"? My specific situation: I have a 70 foot run of 10/3 wire to a subpanel inside my house. How many amps can I have on that subpanel? Thanks, Aaron |
#2
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Chassis wiring vs. power transmission
In article ,
Aaron Fude wrote: I'm learning to interpret the table here (about 1/3 of the way down): http://www.powerstream.com/Wire_Size.htm What are examples "Chassis wiring" and what is "power transmission"? My specific situation: I have a 70 foot run of 10/3 wire to a subpanel inside my house. How many amps can I have on that subpanel? Thanks, Aaron Chassis wiring is *short* lengths of wiring inside a machine. I use 16 gauge in an industrial food processor that draws about 15 amps. That's well under the chassis wiring limit, but far more than you could draw through house wiring. It's all about ohms per foot. |
#3
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Chassis wiring vs. power transmission
Smitty Two wrote:
In article , Aaron Fude wrote: I'm learning to interpret the table here (about 1/3 of the way down): http://www.powerstream.com/Wire_Size.htm What are examples "Chassis wiring" and what is "power transmission"? My specific situation: I have a 70 foot run of 10/3 wire to a subpanel inside my house. How many amps can I have on that subpanel? Thanks, Aaron Chassis wiring is *short* lengths of wiring inside a machine. I use 16 gauge in an industrial food processor that draws about 15 amps. That's well under the chassis wiring limit, but far more than you could draw through house wiring. It's all about ohms per foot. So then the table tells me that I can only have 15amps in my subpanel. That can't be right. |
#4
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Chassis wiring vs. power transmission
Smitty Two wrote:
In article , Aaron Fude wrote: I'm learning to interpret the table here (about 1/3 of the way down): http://www.powerstream.com/Wire_Size.htm What are examples "Chassis wiring" and what is "power transmission"? My specific situation: I have a 70 foot run of 10/3 wire to a subpanel inside my house. How many amps can I have on that subpanel? Thanks, Aaron Chassis wiring is *short* lengths of wiring inside a machine. I use 16 gauge in an industrial food processor that draws about 15 amps. That's well under the chassis wiring limit, but far more than you could draw through house wiring. It's all about ohms per foot. Thanks for your insightful response, BTW. |
#5
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Chassis wiring vs. power transmission
Aaron Fude wrote:
.... So then the table tells me that I can only have 15amps in my subpanel. That can't be right. At =2% voltage drop @120V, yes...240V is 30A @75 ft which would be the subpanel supply voltage I would presume. -- |
#6
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Chassis wiring vs. power transmission
In article ,
Aaron Fude wrote: Smitty Two wrote: In article , Aaron Fude wrote: I'm learning to interpret the table here (about 1/3 of the way down): http://www.powerstream.com/Wire_Size.htm What are examples "Chassis wiring" and what is "power transmission"? My specific situation: I have a 70 foot run of 10/3 wire to a subpanel inside my house. How many amps can I have on that subpanel? Thanks, Aaron Chassis wiring is *short* lengths of wiring inside a machine. I use 16 gauge in an industrial food processor that draws about 15 amps. That's well under the chassis wiring limit, but far more than you could draw through house wiring. It's all about ohms per foot. So then the table tells me that I can only have 15amps in my subpanel. That can't be right. From the notes accompanying that table: "The Maximum Amps for Power Transmission uses the 700 circular mils per amp rule, which is very very conservative." "NOTE: For installations that need to conform to the National Electrical Code, you must use their guidelines." DAGS "NEC wire ampacities" or similar for links to other tables, or wait for the resident a.h.r. code junkies for further info, but yes, I'm pretty sure you can pull more than 15 amps through 10 AWG wire. |
#7
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Chassis wiring vs. power transmission
On 2009-07-30, Aaron Fude wrote:
My specific situation: I have a 70 foot run of 10/3 wire to a subpanel inside my house. How many amps can I have on that subpanel? NEC 2008 section 240.4(D): (D) Small Conductors. Unless specifically permitted in 240.4(E) or (G), the overcurrent protection shall not exceed that required by (D)(1) through (D)(7) after any correction factors for ambient temperature and number of conductors have been applied. [ . . .] (7) 10 AWG Copper. 30 amperes Cheers, Wayne |
#8
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Chassis wiring vs. power transmission
hi, must be a solenoid treat like a "chassis wiring" or like a power transmission? (my english is bad)
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#9
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Chassis wiring vs. power transmission
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