Has anybody ever seen something like this?

[allsystemsgo]

Hi, has anybody ever seen something like this? I am from the states but can't find any "popular" electrician forums it seems.

 

[cogsey133]

USA uses 240v as well as 120v for large appliances over 20A

thanks for that....always something new to learn

 

[Engineer54]

Maybe that transformer is supplying some sort of signal amplifier, or splitter. I'm sure your local electrician will find out and sort it out for you..

Don't you just love all those wire-nuts in that surface ceiling back box!! lol!!!

 

[GLENNSPARK]

thanks for that....always something new to learn

they get it from 2 phase...as far as i know......i think theres about half dozen different voltages in general use in the states....

 

[Engineer54]

they get it from 2 phase...as far as i know......i think theres about half dozen different voltages in general use in the states....

No, it's not an actual 2 phase supply, it is a 3 wire single phase set-up, and basically very similar to you're 110-55-110 Volt that is used on construction sites.

 

[Knobhead]

Just for you Glenn,

This drawing shows a UK farm supply of 480V and also the popular misconception of the phases being at 180°. Just transpose the voltages for the Yanks.

View attachment 12589

Two phase from a Scott T transformer.

View attachment 12590

It’s very rare now, but some US back woods places still have it. I wouldn’t like to come across it. L1-N / N-L2 but the neutrals aren’t normally connected. They can be but L1-L2 voltage is 141% of the L-N voltage, not a lot of use to anyone. So 120V L-N would give 170V L1-L2. The phases are at 90° so the vector sum gives 141%.

Americans are weird!