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Have a 120/208/240/277v transformer. Need to know how to
have a 120/208/240/277v transformer. Need to know how to wire it for 277v input to 120 volt output? … read more
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Sam I
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I'm getting 268 volts on my circuit. Will my 277 lights
I'm getting 268 volts on my circuit. Will my 277 lights still work … read more
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Currently performing electrical service work at a motel
Currently performing electrical service work at a motel built in the early 80's. This motel uses 4 42 slot branch circuit panels that use single pole 277v single pole circuits for their room ptac AC's… read more
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Kevin
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I have a 277/480 wye 200 amp service to my building I have
I have a 277/480 wye 200 amp service to my building I have 114 amps of 277 lighting load connected what size transformer would I need to use the remaining available amps as single phase 120 power and … read more
Mike G.
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I'm trying to replace an outdoor wall sconce and there are 2
hi i'm trying to replace an outdoor wall sconce and there are 2 options at checkout: either 120 volt or 120-277 volt … read more
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We have a 277v lighting system with t1296 flourescent bulbs.
We have a 277v lighting system with t1296 flourescent bulbs. The ballast are the old magnetic type. Some of the ballast make a loud buzzing sound. … read more
Kevin
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Is it dangerous for a 120v hot and a 277v hot wire to share
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Sam I
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I have a simlar question about a started G snswered on.
i have a simlar question about a started Mike G snswered on … read more
Mike G.
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I need 120/240 volts secondary. I have 480 volts 3 wire
I need 120/240 volts secondary. I have 480 volts 3 wire available for primary. Can I get my 240v from tap connections on a 480 v120/208v delta y transformer? If not what kind of transformer do I need.… read more
ProGrade
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I HAVE A 9T51B0190G03 GE BUCK BOOST TRANSFORMER 277V COMMING
I HAVE A 9T51B0190G03 GE BUCK BOOST TRANSFORMER 277V COMMING IN AND 120V SECONDARY, ITS NOT CLEAR WHERE THE 277V NEUTRAL GOES, WHAT IS THE SH WIRE FOR.DOES IT GO ON H1-H4 277 HOT AND SH FOR THE NEUTRA… read more
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How to replace an Advanced 71a6091 core and coil ballast for
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AssuredElectrical
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The power company here in the Philippines will be supplying
The power company here in the Philippines will be supplying two insulated wires at 220V for our house service. Can I use one wire as a ground or neutral for bonding and grounding and a single pole bre… read more
AssuredElectrical
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Steve I have some fans that are currently wired for 110v but
Steve I have some fans that are currently wired for 110v but can be rewired to run for 230 volt. Problem is I would really like to run them at 277v because the power to the building is 277/480 - 120/2… read more
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have a 15306 timer, on a 277volt lighting circuit, it was originally
have a 15306 timer, on a 277volt lighting circuit, it was originally connected to just the 277 volt circuit,does it have to have separate 120 volts to run clock motor… read more
Mike G.
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I live in a condominium building that has 277 volts in all
I live in a condominium building that has 277 volts in all common areas for lighting and air conditioning. I have a storage area that has 277 volts in it and would like to have 120 volts instead. My q… read more
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i have two flourescent lights i installed in a room. both have
i have two flourescent lights i installed in a room. both have two ballasts, i hooked my black power lead to the two black leads coming off my ballasts and ran a jumper to the other set of ballasts an… read more
Alex
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i have a problem with a safety switch i have power on top but
i have a problem with a safety switch i have power on top but when i turn on the lever up i get no power to my togel switch and the fuses are ok what can i do… read more
Sir Sparks
Sir Sparks
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How to determine which wires are which voltage on a multi-tap
How to determine which wires are which voltage on a multi-tap ballast? I have some Cooper MHXB-400-MT low bay light fixtures that were previously wired for 120V. I'm moving them to a different shop an… read more
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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