three phase, stinger?
three phase, stinger?
(OP)
I just leased a building, It looked liked it had alot of different types of machinery in it. And Im not to familiar
with single or three phase electrical. But I remember this guy saying something about a stinger reguarding the electrical panel. My question is does the word stinger only apply in three phase power. When I use my multi-tester
on these 240 outlets I get some wierd readings. Not like the normal. Could it be three phase?
with single or three phase electrical. But I remember this guy saying something about a stinger reguarding the electrical panel. My question is does the word stinger only apply in three phase power. When I use my multi-tester
on these 240 outlets I get some wierd readings. Not like the normal. Could it be three phase?





RE: three phase, stinger?
4 Wire, 3 phase Delta, 120/208 Volts
This type of electric service is sometimes called a wild leg or stinger system because one of the legs is 208-240 volts to neutral while the others are 120 volts to neutral.
RE: three phase, stinger?
In some areas it is used to supply a small amount of single phase load combined with a large amount of three phase load.
In some areas it is used to provide a ground connection for a delta system.
The voltage ratios 120/208, 115/199 are 1/1.73 (sqrt. 3)
respectfully
RE: three phase, stinger?
I've never heard the term "stinger" applied to a wild-leg delta system, but you can certainly get stung by them.
If you have a 240V outlet, it should measure 240 V across the hot leads, regardless of single-phase or three-phase.
If you have 240V three-phase, it is most likely a 240/120 V three-phase delta, aka a "wild-leg" or "red-leg" delta.
If you have 208/120V three-phase system, it is a wye connected system. You will measure 208V across any two hot legs and 120V from any hot leg to ground.
No offense, but it sounds like you should pay an electrician to check it out, if you really need to know. If you take service directly from a utility, they can tell you what it is.
RE: three phase, stinger?
This type of question comes up a lot. Someone should probably write an FAQ on it.
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