12" Expansion Joint Needed Across Bridge Joint

[Natfuelbilll]

Rigid PVC Coated Expansion fitting instructions and advice

We have a bridge structure with a designed 12” expansion movement. I see products are available in 4” and 8” max conduit movement.

Any advice or warnings about installing two (or more) of these fitting together in the same conduit run?

Also of concern is the how to treat or install the copper conductors inside the electrical enclosures on either side of the expansion fitting(s).

 

[Rampage_Rick]

I'd probably go with LFNC loops at each expansion joint rather than the telescopic PVC variety. LFNC also allows for lateral movement.

Others may disagree: http://forums.mikeholt.com/showthread.php?t=140164

There's a 600,000 sq-ft mall nearby that is two conjoined concrete structures with hundreds of LFNC sections across the gap. Haven't seen a single failure.