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 …

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. …

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 …

Jan 9, 2008 · Why do some EC's refer to 480 volts as 440 or 460 when it is actually 480? EC's seem to use them interchangably. Also, I've seen panelboards marked 440 and 460 volts. Can anyone …

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 …

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, …

Jan 3, 2024 · The issue is that the power supply at the site is 3 phase 480V, 50Hz. Would a 3 phase transformer 480V/50Hz primary and 380V/50Hz secondary be our best solution? Another potential …

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 …

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 …

Nov 20, 2018 · I understand the difference between 4wire and 3 wire 480v one has neutral the other one doesn't but why would the 3 wire application but why would power company ask which one as we …