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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
George Smith
George Smith
Vocational, Technical or Trade School
457 satisfied customers
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
Kevin
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Is it dangerous for a 120v hot and a 277v hot wire to share
Hi, is it dangerous for a 120v hot and a 277v hot wire to share a neutral? … read more
Sam I
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.
Mike G.
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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
ProGrade
ProGrade
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Changing a t12 1 lamp ballasts to t8. 3 wires on old ballast,
Changing a t12 1 lamp ballasts to t8. 3 wires on old ballast, blk, white, blue. Lamps are single pin. How do I wire to a t8 with blk, why, red, blue, and yellow wire… read more
Mike G.
Mike G.
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Vocational, Technical or Trade Scho
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I am having 277/480 3 phase wye installed from 208/120 3 phase
I am having 277/480 3 phase wye installed from 208/120 3 phase wye. I have used step up transformer to furnish service to our machines. The transformers are 480 Delta to 208/120 y which we used the se… read more
Steve G.
Steve G.
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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
Steve G.
Steve G.
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Im looking to make myself a testing bench to test 277volt items,
Im looking to make myself a testing bench to test 277volt items, both single phase lights, and 3 phase motors. But I have only 120/208 here at my shop. So i need to get a step up transformer. Now if i… read more
kruzrken
kruzrken
Partner
Bachelor's Degree
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I have wired up an Intermatic GM40W timer over weekend I feel
I have wired up an Intermatic GM40W timer over weekend I feel i have it wired, set and set on 120 volt, but will not turn on lights.… read more
Mike G.
Mike G.
Master Electrician
Vocational, Technical or Trade Scho
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Entering the building there is 1200A switch gear There will
Entering the building there is 1200A switch gear There will be 120/240V panels, 277V panel & 460V panel - total line 943A What size of transformers will be needed?… read more
Mike G.
Mike G.
Master Electrician
Vocational, Technical or Trade Scho
8,290 satisfied customers
Incoming power is 208Y three phase. Power will fluctuate down
Incoming power is 208Y three phase. Power will fluctuate down to 190's (we're in Haiti, unreliable power grid). I have a fish farm I am wiring. Have paddle wheels to churn water, they are either 230Y … read more
Phil
Phil
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I am installing a small stepdown transformer going from 277V
I am installing a small stepdown transformer going from 277V down to 120V to power a GFCI for general use, how do I establish a ground for the GFCI? Doesn't it need to tie into the nuetral at some poi… read more
electrifier
electrifier
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I have 2-115 volt lines and no neutral to the fixture. The
I have 2-115 volt lines and no neutral to the fixture. The old ballast has been removed a while ago. I was told the old fixture voltage was 208. My new universal ballast kit 50watt only has one hot fo… read more
Craig
Craig
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I HAVE A STEP UP TRANSFORMER FROM 120 VOLTS T0 277 WHICH WIRES
I HAVE A STEP UP TRANSFORMER FROM 120 VOLTS T0 277 WHICH WIRES ARE INPUT 120 AND WHICH ARE OUTPUT H-1 & H8 X1 X2?… read more
Sir Sparks
Sir Sparks
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I have a sign with flourescent lamps & a 277V ballast. The
I have a sign with flourescent lamps & a 277V ballast. The power that was run to the sign is 480. What do I need to do to make work?… read more
Joseph
Joseph
743 satisfied customers
Purchased bollard lights on ebay for patio. Opened to connect
Purchased bollard lights on ebay for patio. Opened to connect and found sticker 'Dual Voltage Leads - Factory wired for 277v. Black and orange wires attached to sticker, white lead separate. How do I … read more
Rich
Rich
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Vocational, Technical or Trade Scho
1,117 satisfied customers
Is there na difference in a ballast for residential fluorescent
Is there na difference in a ballast for residential fluorescent lights as for commercial ?… read more
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Joseph
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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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