- The transformers already installed on channel letters or any other neon illuminated sign are two types
a.- The old type non GFI Transfomer
b.- The new type with GFI transformer
- Transformers are also made in 30 Ma and 60 Ma output currents
When a 60 Ma transformer is used in a sign , the neon electrodes have to be also rated at 60 Ma or higher , if a replacement neon letter is made with 30 Ma electrodes and installed on a sign with a 60 ma output current , the electrodes on that letter will heat up and they will not last very long.
Self Enclosed Transformer
The box is design for the flexible conduit to connect directly to it.
This transformer need a metal box to enclose it
Metal box for the regular neon transformer
Channel Letter Transformer
This transformer are also installed in large channel letters and the electrodes go inside the housings