277volt and 480volt wiring without a neutral | Information by ...
Jul 23, 2019 · All, I have a question regarding 3 phase power without the use of a neutral. I received a question asking if it is proper to wire a 480v parking lot light using only 2 hot conductors (=480v …
480V/3-phase line-to-line value | Information by Electrical ...
Dec 5, 2013 · The line to neutral voltage is 277 and the line-to-line voltage is 480. You can connect either wye or delta loads with the appropriate voltage rating or either 277 or 480V single phase loads. …
Spacing between Phases in Equipment | Information by Electrical ...
Jun 25, 2014 · Would someone know if there is a NEMA rule of thumb with required clearance needed between phases at 480V and then from phase to ground (277V)? I'm guessing an inch or two, but …
480 volt single phase | Information by Electrical Professionals for ...
Mar 1, 2017 · I have a piece of equipment that requires 480 V single phase. Correct me if I am wrong but is this simply a 2 pole breaker regardless if the system is a Wye, Delta corner grounded or Delta …
480Y/277V (WYE) Service Entrance to 480V Delta Transformer -- Final …
Jun 13, 2025 · According to the POCO's service manual, only 480Y/277V is available. Thus, to beat a dead horse, can we serve a 480V delta primary : 208Y/120V secondary transformer from a …
480V, 3 phase delta to 240V with high leg question
Jun 12, 2024 · The secondary power from the transformer will go to feed a meter bank on each floor. I want to bring 3-phase power to the meter bank but 120/240V single phase to each dwelling. Then I …
How to size a 480 to 240/120V Transformer - Mike Holt's Forum
Nov 20, 2015 · -480V 3 phase 60HZ Secondary Load - See attachment -120/240V Single phase 60 amp power panel. 4 wire. Transformer will be mounted 1000ft from MCC 480V power source and about …
MEGGERING A MOTOR PHASE TO PHASE | Information by Electrical ...
Dec 24, 2011 · I always megger a 3 phase 480V motor phase to ground, but I am wondering if meggering phase to phase can tell me something about the state of the winding insulation as well, …
Will 480V three phase generally have a neutral? | Information by ...
Jul 9, 2025 · I work for an OEM. We have a new product that requires 460V with a neutral (277V) to run. If our customers have 480V service will they generally have a neutral tap as well? Or is that a risky …
480Volt GFCI | Information by Electrical Professionals for Electrical ...
Jul 13, 2021 · 210.8B 3 phase GFCI 150volts or less to ground, So with 480 its business as usual? Do they even make 3 pole 480volt GFCI protection?