Maximum Runs On A Busbar According To Standards

dear,

One thing I would like to clarify that this is design related question. What do you mean by word ' allowed ' ? You may select as many as you can justify your selections.

What do you mean by word ; standards' ? - here is also a lot of varieties available.

Normally, you should have data of power loss / Mtr. , Amp. rating with specific temp. rise, Short circuit fault levels with stand capascity / sec. or 3 sec., etc...

With the above slection, & engineering calculations, that depend upon chamber size, insulator spacing, skin effect of bus bar conductor, etc....

Normally, electrical grade bus bars are Electrolytic grade, & you should select the low loss bus bars grade , even for the same size.

Ideally, Oxygen free Copper Bus bars are preferred, but with size selection, you may achieve the same results with EC grade Copper - 99.9% pure., but Commercial grade bus bars are <98.5% pure, making higher losses.

HI

I WOULD LIKE TONOW WHAT IS MENT BY A " RUN " .

BESRT REGARDS FOR ALL

HELAL BASHO

Isn't the English language fun? Especially when we who regularly speak it like to create new meanings for the words to save time in describing something. The term "run" comes from "running" the wires from the source to the load. Now, why we choose the verb "run" to become a noun that describes the act of pulling wires into a conduit, who knows at this time? Been that way since I first became involved in electrical work, which is 48 years ago. To make things even more interesting, we also will call a completed conduit installation a "run" of conduit. Fun language, huh?

thank you very

and

best regards

hi,

RUN here it means the no of parallel busbar on the same phase.

regards

sachin

thank you very much

and

beat regards

Same idea. So, someone ran the busbars, and now we have a "run" of busbar. Still an incorrect use of the word run, to shorten the description of the busbar installation. In reality, no-one ever "ran" the busbars, so they are not a "run". They are an installation of parallel busbars. Run is just easier to say, and people who work with electricity and speak English as their main language understand it. Those trying to translate back to another language are lost.

Check out Wikitionary - 28 meanings for the noun "run" and none of them relate to wire, or conduit, or busbar.

As I said earlier - "fun language to try to understand, isn't it?"