Definition of Bus?

[ibew441dc]

In regards to the Article 100 def. of a motor control center , what is a "common bus" ?

I,m pretty sure I know what a bus bar is but what is a bus? If I have an individual circuit breaker in a cut-out box , line conductors coming in and load going out , Would the internal make-up of the breaker be considered a "common bus".



ibew441dc

"five minutes ago , Ithought I knew it all"

 

[iwire]

IMO it is what you described is just a bus.

Now the bus in a panel board I would call a common bus as it supplies more than one item.

Do I have any reference to point to?......No

 

[jim dungar]

In regards to the Article 100 def. of a motor control center , what is a "common bus" ?

I,m pretty sure I know what a bus bar is but what is a bus? If I have an individual circuit breaker in a cut-out box , line conductors coming in and load going out , Would the internal make-up of the breaker be considered a "common bus"

I hope not. The breaker would not be efficient at opening the circuit if its line and load terminals were "common".

In simple electrical engineering terms a "bus" is a connection point. This point could be a bar, a tapped cable, a circuit board tracing, or even a wire nut.

 

[ibew441dc]

I hope not. The breaker would not be efficient at opening the circuit if its line and load terminals were "common".

In simple electrical engineering terms a "bus" is a connection point. This point could be a bar, a tapped cable, a circuit board tracing, or even a wire nut.

Jim

Would you read my other post, (Is it a MCC) and put your two cents in.

thanks

ibew441dc

 

[augie47]

definition

definition

can't resist...saw too many Leslie Neilsen movies...

Bus: Big box looking thing with tires, wheels, stering wheel and a motor.

meanwhile , talking about electricity...............


sorry

 

[dcspector]

Augie is that a motor or engine in that bus?

 

[brian john]

Not much help but my 2 cents.

Per the IEEE Dictionary there is no definition of common bus, there is a definition of bus-bar

Bus-bar-A common metallized region that connects the individual interdigital transducer fingers and provides a contact area for external circuit connections via bonding or other means.

Dictionary For The Electrician has:

bus-A conductor, or group of conductors, that serve as a common connection for two or more circuits.

bus bars-Heavy copper bars connected with all the dynamos in a central station in order to receive the entire electrical output, and carry the distributing conductors of the system.

busway-A protective enclosure for buses (conductors formed by large cross section bars or rods).

From Trade Slang web site:

Why is a bus bar called a bus bar?
The 41 page Electrical Dictionary in the 1910 American Steel and Wire Company catalog defines a BUS as "a word generally used instead of omnibus." It then defines OMNIBUS BARS as "heavy bars of copper connected directly to the poles of a dynamo in a central station, and, therefore, receiving their entire current. Main conducts common to two or more dynamos in an electrical generating plant." To take it one step further, the word Omnibus comes from a 1828 description of a new French public transit vehicle with seats down both sides. Since the meaning for the latin prefix omnis is "all", this description makes sense. For a complete history of the word Omnibus.

 

[ibew441dc]

Not much help but my 2 cents.

Per the IEEE Dictionary there is no definition of common bus, there is a definition of bus-bar

Bus-bar-A common metallized region that connects the individual interdigital transducer fingers and provides a contact area for external circuit connections via bonding or other means.

Dictionary For The Electrician has:

bus-A conductor, or group of conductors, that serve as a common connection for two or more circuits.

bus bars-Heavy copper bars connected with all the dynamos in a central station in order to receive the entire electrical output, and carry the distributing conductors of the system.

busway-A protective enclosure for buses (conductors formed by large cross section bars or rods).

From Trade Slang web site:

Why is a bus bar called a bus bar?
The 41 page Electrical Dictionary in the 1910 American Steel and Wire Company catalog defines a BUS as "a word generally used instead of omnibus." It then defines OMNIBUS BARS as "heavy bars of copper connected directly to the poles of a dynamo in a central station, and, therefore, receiving their entire current. Main conducts common to two or more dynamos in an electrical generating plant." To take it one step further, the word Omnibus comes from a 1828 description of a new French public transit vehicle with seats down both sides. Since the meaning for the latin prefix omnis is "all", this description makes sense. For a complete history of the word Omnibus.

thanks for the info

ibew441dc