Control panel Transformer spacing requirements

[jakeparsons03]

I am putting in a little 120/24VAC 250-500VA transformer inside of one of my panels but I cannot find the UL requirments on spacing on all sides. Does anyone know how much spacing I need?

 

[petersonra]

It would come with the instructions if there are any restrictions.

 

[ptonsparky]

The items next to it may have some restrictions.