120/208V Y system

[iwire]

Bob -
I offered the IEEE reference to help with standard nomenclature. I figured a reference was better than pulling it out of my .... uh.. the air.

:grin:

Thanks for not pulling anything out of your .... uh.. air.

I understand the need for standard nomenclature and due in a large part to Jim D. I try hard to use the proper system nomenclature.

I really didn't have any interest is eliciting a demeaning response.

Not really sure what you mean there, I was not attempting to demean anyone. I was just pointing out that it is a rare electrician that is that careful about voltage system nomenclature.

That's good. Over the last 35 years I've had maybe 15 classes based on various aspects of the NEC. So, you should be right up there on the IEEE.

Great you are one of the rare ones , similar to the few electricians that have every been told there is a right way to describe different voltage systems. We still often see people posting about '220' circuits.

 

[dicklaxt]

The transformer in the OP could be either 208-120/208 or 240-120/208 both 1 phase,from the readings it is probably 208-120/208 with a dirty terminal,smile

dick

 

[augie47]

Yep! The supply is a 3 phase Y system from the transformer but the subsystem I'm concerned with is fed with only two hot legs (single phase) and a neutral. I haven't had time to check the supply voltage at the 3 phase service panel yet to compare voltages, I'll do that next Monday. It was a call late on Friday that didn't justify overtime. Just thought I'd get some input from you guys before I continued with it.

That clarifies things a lot and makes more sense. You will likely find the voltage variations aren't as bad at the source and you situation may be partially a result of load and voltage drop.
I would check your voltage at the source and, if possible, check your neutral connections. Depending on the particulars (wire size, length of runs and load) your situation may be "normal"

 

[Cold Fusion]

... I was just pointing out that it is a rare electrician that is that careful about voltage system nomenclature. ...

That's reasonable. The only time I get careful is if the context is confusing.

Sam -
I figured your description was clear in the first post, with minor clarification in the third post.

cf

 

[Cold Fusion]

...Not really sure what you mean there, I was not attempting to demean anyone. ...

I had interpreted your response to mean that if someone was going to give a nomenclature and reference, you would just as soon it not be an IEEE.

My mistake.

cf