MV conduit over seismic joint

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o77656e53

New User
Location
San Francisco, CA, USA
Occupation
Electrical Engineer
Hi All,

Has anyone done an installation or have experience with connecting medium voltage cabling within fire rated conduit over a seismic joint within a structure.

I have ruled out expansion joints as the conduit could potentially move 3" in any direction.

I am assuming there is a need to provide a junction/pull box at either side of the seismic joint. Then provide flexible fire rated conduit with cable slack between the junction boxes to allow for any movement. Or am I over thinking this and all that is required is a flexible section across building expansion?

Thanks in advance.
 
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