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I have a few questions about step up transformers and help
Hi George. I have a few questions about step up transformers and help with designing my power needs for a commercial buildling that we are erected based off incoming power of 208V 3PH in Wye Configura… read more
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Need to size a transformer and breaker. Source is 480VAC 3 phase into a main panel from city drop. 225 amp breaker in that panel will feed 225 amp 3 phase 480VAC sub-panel. 2 pole breaker in sub-panel… read more
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I am installing 120/240 secondary panel. I will have 2-20
I am installing 120/240 secondary panel. I will have 2-20 amp single pole breakers and 1-30 amp double pole breaker. What size transformer do I need? What size breaker would I need to feed my 480 volt… read more
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I am feeding a 150 amp 480 3 phase sub panel. The run is
Second opinion] I am feeding a 150 amp 480 3 phase sub panel. The run is approximately 1000 ft what size wire do i need including grounding size. What size conduit do I need.… read more
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I have to power 80 - 120V 1500Watt 12.5Amp heat lamps. I am
I have to power 80 - 120V 1500Watt 12.5Amp heat lamps. I am needing to go from a 100amp 480V 3 Phase and step down to 120V Single Phase. need to know what size of transformer to get. … read more
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I have a 480 electrical service I need to step down
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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 know that 220v are supplied to residential. How many volts
I know that 220v are supplied to residential. How many volts are typically brought into a commercial building? If the legs are more than 110v does the tenant have to supply step down transformer? Same… read more
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I have two 400 kW gensets connected through a synchorization
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Sam I
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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
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I have a 3 phase 480v 400amp feed coming into my shop, I want
I have a 3 phase 480v 400amp feed coming into my shop, I want to install a transformer and step the power down to single phase 120/240v 200amp. Would stepping the power down increase the available amp… read more
AssuredElectrical
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Hi my name is ***** ***** I want to know the best way to feed
Hi my name is ***** ***** I want to know the best way to feed 2 panels from one meter base.1 panel will be 3 phase 120/208 and the other being single phase 120 240.I've got a 3 phase service..… read more
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This question is for Jason only. I can wait and am not in a
This question is for Jason only. I can wait and am not in a rush. Hey Jason hope all is well. Have some electrical questions for you. I'm looking at getting a building which has 400 amp service. Is th… read more
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hi i have a 45kva transformer in an existing warehouse , the
hi i have a 45kva transformer in an existing warehouse , the shop now has almost no load and the customer wants to install 70 kva of full load of different equipment , does he need to upgrade or chang… read more
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For a 75kva transformer, 480 step down to a 240/120v, how would
For a 75kva transformer, 480 step down to a 240/120v, how would I size the primary and secondary conductors.… read more
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I have 480 volt 3 phase power that I need to connect to a portable
I have 480 volt 3 phase power that I need to connect to a portable building. I need a 200 amp 3 phase fusable disconnect on the exterior of the building. From there I plan to enter a 480 volt 3 plase … read more
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I have a 400amp. service panel,its feeding four transformer,they
I have a 400amp. service panel,it's feeding four transformer,they are 15kva,75kva,150kva,75kva.how do the calculation to see if there max out.(up to 80%) I want to know if upgrade is needed… read more
electrifier
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I currently own a shop with single phase 240/120 volts I have
I currently own a shop with single phase 240/120 volts I have 120 volts lights and 240 volt motors.I'm in need of 430 volt three phase power for a new compressor and welder What voltages would be best… read more
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Meet the Experts:

Mike

Mike

Master Electrician

1,426 satisfied customers

Licensed Master Electrician - OnQ Certified Data Voice Audio Video Installer

Jason

Jason

Service Technician

4,922 satisfied customers

Over 20 years of experience in all types of installations, troubleshooting, and repairs.

Mike G.

Mike G.

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Proven Professional 49 years Experience

Kevin

Kevin

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electrifier

electrifier

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Rich

Rich

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mrromex

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over 40 years of all phases related to residential wiring and remodeling

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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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