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Why use 277v light fixtures instead of 110v light fixtures?
277v light fixtures are more efficient to operate and less expensive to install than a 110v fixture of identical wattage. 277v light fixtures are typically installed when 480V 3 Phase primary electric service supplies a commercial or industrial facility. 277v lighting circuits are single phase circuits using one of the 480v primary phases (A,B & C) to Neutral. The higher voltage allows more fixtures per circuit using smaller conductors and longer runs typically required in warehouse lighting applications. ( Amps = Watts/Volts: 400W/277V Fixture = 1.4 Amps, 400W/110V fixture = 3.6 Amps) With 480V 3 Phase primary service, 110V Single Phase power is created using a Step-down transformer. The voltage transformation process consumes power (kWh) and the 277V fixture will consume less kWh than a 110V fixture if identical wattage, especially in fixtures with ballasts such as fluorescent or High Intensity Discharge (HID), like Sodium, Metal Halide or Mercury Vapor.
What size conductors are needed to run a 400 foot residential underground electric service?
Need to know what size service is going to be installed at the end of the run.
What is the minimum service size for a 225amp residential service?
A 200 amp service panel with a 60 amp sub-panel.
What is the difference in amps used by lighting wired 277v vs 208v?
Answer for USA, Canada and countries running a 60 Hz supply service.Assuming you are using the same fixture, and assuming the fixture can operate on either voltage, you will get fewer amps with 208v than with 277v. However, a fixture designed for 208v will probably burn up on 277v, and a fixture designed for 277v will probably not produce any light on 208v.The two fixtures in reality are quite different. The 277v fixture is using one leg and neutral of a 277/480v 3 phase 4 wire system and the 208v fixture is using 2 legs of a 120/208v 3 phase 4 wire system.In commercial and industrial installations the 277v fixture is most common.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
What is 277 volts?
277 volts is the Hot to Neutral voltage in a 277/480 volt 3-phase "Y" electrical system. This is a commercial and industrial application voltage. The purpose of using higher voltages in these applications is to supply higher power levels [watts or kVA] than at lower voltages for the same size of conductor. <><><> A 277 volt service is used for industrial lighting. <><><> A 480 volt 3-phase power service is common in factories in USA and other countries which use 60 Hz ac electrical services. If you use the 480 volt service lines in the 'star' or 'Y' configuration you will have a central neutral point to connect a neutral line. You can then get a 277 volt single phase service by using one of the three phase lines along with that neutral
What percentage of US has Residential Phone Service?
75% of US has Residential Phone Service.
Where can I find good Residential Phone Service in Boston?
Verizon offers great Residential Phone Service in Boston
Where can I find cheap residential phone service?
It will depend on your area but you can check with Verizon to see if they offer residential service in your area.
In what year did the US postal service stop twice a day residential service?
1950. Residential deliveries reduced to one a day.
What's wrong with a 240V outlet that tests at 277V?
What's the reading at the service panel? What do regular 115V outlets read at? What kind of meter are you using? Chances are you have 480/277V 3 phase power to this building. Whoever wired the outlet used a 277V feed, possibly because 240V was not avaliable. You should call an electrician, repair of this problem may involve instalation of a transformer.
How many people still use residential phone service?
Currently, only about a quarter of U.S. households do not have residential phone service. Many other people maintain residential phone service but rarely use it, though this number is not measured.
Does residential VOIP usually include an answering service?
No, that is an optional service.
Can you lower 277v to 240v?
With a transformer.
How do you cancel ATT residential telephone service?
you can't
Is a 240-volt service available to a customer who has a two-wire residential service?
Not in the US of A.
What companies provide residential cable service in Birmingham Alabama?
Time Warner Cable and Bright House Networks both offer residential cable service on Birmingham, AL.
Local Internet Service?
form_title= Local Internet Service form_header= Find the internet service today and get connected! Are you currently connected to the internet?*= () Yes () No What is your minimum speed requirement?*= _ [50] Do you need residential or commercial internet service?*= () Residential () Commercial
