Transformer as main panel feed

[wye so busy]

I am 99 percent a residential electrician, I have recently been thrown into a non comfort zone situation I need help with. I have a 480/240 v to ground distribution panel in the middle of nowhere. The complex is a soccer field on which a small building to house two bathrooms and a cover area. A 7.5 KVA 480/240 to 240/120 transformer was ordered. My question is after hooking up what I thought was correct for 120 volt, I have 120 volt, everything works but GFCI outlets will not test trip with a plug in tester. I have read alot on this and am still not clear on issue.

 

[infinity]

Have you properly bonded the neutral?

Welcome to the Forum.

 

[don_resqcapt19]

The secondary of the transformer needs a connection to a grounding electrode and you must install a system bonding jumper to connect the neutral to the grounding conductors.
You will also need the correct overcurrent protection for the transformer and for the transformer and the conductors.
Can you give us more information on what you installed.

 

[kwired]

Your plug in GFCI tester puts a low level current from the "hot" conductor to the equipment ground conductor when you press the test button. It is at a level high enough the GFCI should respond to it.

If you fail to bond the intended grounded conductor and/or the equipment grounding conductor there is no path back to the source for this current and no current will flow.

Bond can be in the transformer or at the first disconnecting means of the secondary.