Wiring utc a-10

[salomonander]

Hey there,
need some help wiring a utc a-10 for di purposes. 50k:200. Im not certain about the output connections. It says join 3&4 and then ct,
Do i leave that centertap (3&4) open, or should i connect it to ground?

Thanks

 

[CJ]

that is built with two identical coils so you have to connect them, so join the CT,

 

[Murdock]

And don’t connect it to ground. So join them and leave it open.