Artificial Ventilation is 12v DC Fan inside panelIs 4x50 busbar inside electrical panel is over-enough for 100a ?, @220v, with artificial ventilation, no heat-shrink, ambient temperature is 35 degree-celcius
Pure CopperCurrent carrying capacity? You do not mention Copper, Aluminum or Brass material? The link will point to the applicable standards.
Ron
4mm x 50mm, please don't answer question if you can't answer, I see you has been reply many question with question, stop itAlso, is the "4x50" dimension in millimeters or centimeters or micro-furlongs?
Les is correct! In addition, without enough information, any answer is only a guess, based on assumptions. Since most of the responders want to provide useful answers, we often seek additional information.If you provided ALL the relevant information in your original question members would not need to ask so many questions.
So the logical conclusion is that ask a question in future without all the required information you want no one to reply.
Les.
@MisterBill2 Problem is you have answer many question with answer; you can think 4 x 50 micro meter is unusual, also you can think is 4 x 50 centimeter is also not usual, you can imagine if 4 x 50 micro meter is for 100a, also you can answer for each possibility nor very usual possibilityIf you provided ALL the relevant information in your original question members would not need to ask so many questions.
So the logical conclusion is that ask a question in future without all the required information you want no one to reply.
Les.
The cros sectional area is easy: 50x4=200 mm**2. At 240 amps that would be 2.4 amps per square mm, so that does seem like a reasonable number.Everyone has the right idea here, except telling the TS what they are doing.
Need to now:
Material
Cross-sectional area.
I'd agree, use wire tables and find the ampacity of the same cross-sectional area. We know your in Japan, but there are still other issues to worry about.
In the US, you would go for 1.20x of what you need. In other words, it can carry 80% of the load continuously.
Not too sure if the size and number of bolts.
If I was really worried, I'd assume that there are no bolts and look at the cross sectional area of that, not of the bus bar.
You can go back to fundamentals where R=ρL/A where ρ is resistivity, L = length and A= cross-sectional area as if there were holes. You might want to look at a 3% drop, but then it depends on where the feed is located. Ends or center? Now add temperature dependence. Someof the formulas have a 2L term. That might matter too. Resistivity is a materiil property with a temperature dependence.
IMO That is a most confusing expression, why can't it simply be referred to a thou's?There are some individuals in my acquaintance who often speak of dimensions in "mills", which actually is thousandths of an inch.
If it's 500a so... no problem, I need's 200-500% than continuous load, for further expansion
Why not 200% ?, I am against 125% rules, we use 200%-500%, but project's were we works is need's highly available to expasion, so... 125% rules is forbiddenEveryone has the right idea here, except telling the TS what they are doing.
Need to now:
Material
Cross-sectional area.
I'd agree, use wire tables and find the ampacity of the same cross-sectional area. We know your in Japan, but there are still other issues to worry about.
In the US, you would go for 1.20x of what you need. In other words, it can carry 80% of the load continuously.
Not too sure if the size and number of bolts.
If I was really worried, I'd assume that there are no bolts and look at the cross sectional area of that, not of the bus bar.
You can go back to fundamentals where R=ρL/A where ρ is resistivity, L = length and A= cross-sectional area as if there were holes. You might want to look at a 3% drop, but then it depends on where the feed is located. Ends or center? Now add temperature dependence. Someof the formulas have a 2L term. That might matter too. Resistivity is a materiil property with a temperature dependence.
You did ask what would work. You would never melt copper, but voltage drop is what your looking for. Standard is <3% in the US. There's temperature effects.Why not 200% ?, I am against 125% rules, we use 200%-500%, but project's were we works is need's highly available to expasion, so... 125% rules is forbidden
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