Trapeze mount xfrmr

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Npstewart

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Is there a size limit for trapeze mounting a step-down transformer, 480-->208 3 phase? I know above 50KVA it has to be in a ventilated space etc. Right now we have a 225kVA transformer with little space, trapeze mounting it above the panels (in a air conditioned space) would be a perfect solution.

Thanks in advance.
 
Electrically no problem, mechanically, structurally maybe.

I have hung 300 KVA trans before but I had engineered drawings showing the building structure could handle it and that the trapeze was strong enough.

This is not a load you want to hang from the bottom chord of a standard metal truss.

We had specific instructions how to hang it from the tops of I-Beams with 3/4" threaded rod.
 
WastefulMiser said:
When space is limited I always enjoy informing the customer that we will be installing their equipment with skyhooks.
Click to expand...

I love telling the desigers (architectural) that who always seem to conviently forget that the electrical equpment needs somewhere to "live". I will never forget one time I had a designer tell me "Ok, but can I see the color selection" I laughed they did not so I slowly walked away...
 
We always hang them when the space is tight. Here's two small ones with about 8' of clearance under them.

Rob%27s%20Work%20024.JPG
 
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