Step down transformer

[Mike1977]

Hello all! I have a little issue that I’m not familiar with. Im working on a sign that currently doesn’t have any power, and getting 120v to it would costs thousands with the options I have. There is currently a pole light 5’ away that has 208v. Pulling another set of wires is out the question. I had the thought of looking into a small weather resistant transformer that I can enclose in the sign, and step down 208v to 120v to feed the sign.

My question is, can anyone recommend a transformer or website where I can purchase one from. Thanks again!

 

[petersonra]

Most transformers are available in type 3R potted enclosures. Just call your regular electrical supply house and see what they have available.

I would be cautious about this approach though. No way to tell what you might be messing with at the pole and it could be hard to do so in a code compliant way. For instance, it is not unusual for poles to be supplied without an egc even though it is not code compliant to do so.

It seems to me that as an electrician you should know this though. Transformers are a real basic part of being an electrician.

 

[Electromatic]

What exactly in the sign needs power? If it's just lights, get 208V ballasts or LED tubes that operate at 208V.

 

[LarryFine]

What exactly in the sign needs power? If it's just lights, get 208V ballasts or LED tubes that operate at 208V.

Agreed. That also eliminates electrode needs.

 

[electrofelon]

https://www.automationdirect.com/adc/shopping/catalog/power_products_(electrical)/transformers/encapsulated_core_general_purpose_transformers_(nema_rated)/c1fc10we?_gl=1*i237kc*_up*MQ..&gclid=CjwKCAjwooq3BhB3EiwAYqYoEsroA9jRbDfcxqJFgbS-ejrnN7qt7MqVc9V8kY6js0uFXBb2Ky3JZhoCiWYQAvD_BwE

 

[hillbilly1]

What exactly in the sign needs power? If it's just lights, get 208V ballasts or LED tubes that operate at 208V.

Most new signs are multi-volt LED now, so it may need nothing but being connected.

 

[petersonra]

Agreed. That also eliminates electrode needs.

Why would it need an electrode?

 

[LarryFine]

Why would it need an electrode?

Wouldn't a secondary as an SDS require one?

 

[petersonra]

Wouldn't a secondary as an SDS require one?

Not if it is a class 1 1000 VA or less. Just needs a connection to the egc. Would a small led sign typically exceed 1000 vs?