I have a Pentair EasyTouch Automation system for the pool, and it is installed on the outside of the house in a subpanel. When it was installed, I also ran 12ga direct burial wire around the pool landscaping, and from the pool, runs through underground conduit into the Panel. In the pic, the wiring is annotated w the red arrow. I was going to purchase an isolating safety transformer, likely the Intermatic PX300. This would supply between 12-14v AC power to the lights.
The PX300 comes with its own outdoor rated box. However, I don't want to install it on the wall. In the pic, where the yellow square is, is typically where the transformer for the salt generation cell would go, but I didn't go for a salt pool, so I have a big empty space in the panel. Can I remove the PC300 transformer from its box, and install it where the yellow square is in the panel pic, screwing is into the holes in the subpanel? Would 725.136(A) prohibit me from doing this?
Thanks!
PX300 Transformer: http://www.inyopools.com/Products/02400015000949.htm
Subpanel
Best Answer
You are correct.
There are several points in Article 725 that are not going to allow that to happen. This would give you no viable plan to rigidly separate mains from low voltage wiring, and that won't do.
Further, it would violate NEC 110.2 and 110.3(B) because you'd be defeating the UL-approved enclosure design, and using the transformer contrary to instructions and labeling.