wiring for a 220v to 110v step down transformer | All could someone please look at the schematics i posted. i have a 1kva step down transformer so i can use 220v on my 110 volt A/C. i tought the one i drew up would be the way to wire it, but i found another schem on the internet. is one better than the other? here is a pic of the xformer too. 110V Centre Tap Earth (55V-0V-55V) - Electrical 110V Centre Tap Earth (55V-0V-55V) A centre tap is a connection made from the centre of the secondary winding of a transformer. It is labeled as Earth, Common or 0V. Grounding secondary winding of a transformer is usually done by connecting the earth to the neutral lead. IET Forums - 415v 3phase to 110v 3phase transformer wiring "110 volt 3 phase" can mean different things to different people in different countries. It probably means a 3 phase supply with 110 volts between phases and 65 volts phase to neutral. This is widely used in UK building sites and suitable transformers are readily available. Step Down Transformer 480v to 120v Wiring Diagram Sample Step Down Transformer 480v to 120v Wiring Diagram Sample - Collections Of 480v to 120v Transformer Wiring Diagram Elegant 3 Phase Step Down. Phase Wiring Diagram In Addition 480v Step Down Transformer Wiring. 480v Transformer Wiring Diagram Coachedby Me and – Volovetsfo. Step Down Transformer 480v 120v Wiring Diagram Trusted Wiring. HOW TO USE A 3 WIRE TRANSFORMER ? - YouTube hi friends welcome to simple homemade projects , in this video i had shown you that how you can use a 3 wire transformer .