High leg position?
High leg position?
(OP)
Using a 230/3/60 V.A.C. 4 wire system with a "high" leg, is there a code in which phase this wire must be placed on (L1 or L2 or L3) ? At times a 230 volt line & neutral is used for the control voltage (115 V) or for a GFI receptacle. Of course if the high leg is on either, many problems occur. Thanks !





RE: High leg position?
RE: High leg position?
This is way to high for control voltage or a GFI. I would like to know if this high leg is always placed on a specific phase when connecting to a motor control panel.
RE: High leg position?
RE: High leg position?
This is not really a neutual conductor but what the nec code calls a grounding conductor. Only a 3 phase wye, center tapped transformer or a center tapped single phase transformer would that conductor be called the neutual.
RE: High leg position?
RE: High leg position?
Older 240/120V 3ø 4w ∆ systems may be found with the high leg in the Cø [righthand] position, based on some electric-utility metering standards.
RE: High leg position?
RE: High leg position?
In addition:
NEC 215.8 requires high leg to be identified by either orange outer finish or tagging or other effective means at each locations (panel, junction boxes, etc) where a groudned condcutor i s also present.
NEC 408.3 (E) requires the B phase (center) to be the high leg.
This of course applies in the USA. Your local Codes may have slightly different requirements.
RE: High leg position?
"This is not really a neutral conductor but what the nec code calls a grounding conductor. "
The conductor is not a "grounding" conductor. It is a "grounded" conductor. In the code, there is a big difference in these two conductors.
Don
RE: High leg position?
Even when the utility requires the high leg to be in the right hand or "C" phase position in the metering equipment, the NEC requires a transition to the center or "B" phase position in the service equipment. There is an exception permitting the high leg to remain in the "C" phase position if the meter is in the same single section or multisection switchboard or panelboard.
Don
RE: High leg position?
Isn't a Cø highleg also permtiied to "match existing" in a particular facility?
RE: High leg position?
RE: High leg position?
You would be carefully when working in a delta conection of TR secundaries 3p-4w.
Saludos.
Alfredo Corona
Mexico
RE: High leg position?
http://www.intermatic.com/comind/guides/install/PG2000%20Series.pdf
for the high leg connection to PanelGuard, high leg on L2 red, and 208V from high leg to the neutral and to ground.