Busway/ Busbar Expansion Coupling Box

[Sajid khan]

Could any one Help me to understand the need of Expansion Coupling of busway at the point of building Expansion joint?

We have building expansion Joint (75mm) and below the expansion Joint we have Four busway of different ampere rating. The busways are so close to each other and we cannot accommodate busway expansion coupler (Dimension of 600x600mm).
My Question is Do we really need Expansion Box? We have a lot of Busway Joints at several locations that have the flexibility to accommodate Building Expansion-Contraction?

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[xptpcrewx]

We have building expansion Joint (75mm) and below the expansion Joint we have Four busway of different ampere rating. The busways are so close to each other and we cannot accommodate busway expansion coupler (Dimension of 600x600mm).
My Question is Do we really need Expansion Box? We have a lot of Busway Joints at several locations that have the flexibility to accommodate Building Expansion-Contraction?

Is the flexibility of these several busway joints your opinion or is the busway designed by the manufacturer for such flexibility?

 

[Sajid khan]

Is the flexibility of these several busway joints your opinion or is the busway designed by the manufacturer for such flexibility?

There is Flexibility of 6mm in Every busway length means a length has two ends and each end has a flexibility of 3mm, two ends will make 6mm Flexibility. This is as per manufacturer.
My question is We have a lot of joints in busway and several joints can make enough flexibility that can withstand Expansion and contraction.


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[xptpcrewx]

There is Flexibility of 6mm in Every busway length means a length has two ends and each end has a flexibility of 3mm, two ends will make 6mm Flexibility. This is as per manufacturer.
My question is We have a lot of joints in busway and several joints can make enough flexibility that can withstand Expansion and contraction.


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If the manufacturer allowable flexibility for the busway section at the location of concern = expected building expansion/contraction at that point, then sure why not. If you are trying to use the aggregate flexibility of the busway sections (to get a larger number), I would say no because you would not want to exceed flexibility permitted for each individual section, nor would you want one section pushing/pulling/twisting the rest of the busway to get it to move.