The Siren Board

I Believe this is 3 phase but need to know for sure.

Thanks!

Looks like a three phase one to me, I can see three "hot" lines and the messenger wire on the service entrance coming to the pole.

murrfarms wrote:Looks like a three phase one to me, I can see three "hot" lines and the messenger wire on the service entrance coming to the pole.

Thanks!

It looks like it's one of the really old and short ones like the ones that Bethany has.

Now the question is what type of 3-phase?

JasonC wrote:Now the question is what type of 3-phase?

There's different types of 3 phase?

Yes like open delta or also known as phantom phase.

FSThunderboltfan1000 wrote:Yes like open delta or also known as phantom phase.

Is there a simple way to tell which type of 3 phase is being used on this siren?

Yes look at the power poles by the siren. If there are three transformers then it is regular 3-phaes if there are only one or two it is 3-phase open delta.

Here is what open delta looks like as an equation.