Explaining Voltage Transformation for Receptacles

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Master Electrician Teaches his Son the Basics of 480-277 Volt Vs. 120-208 Volt Systems, Thoughts?

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What happens here

The process of stepping down the voltage involves tapping off the 480 Volt supply using a circuit breaker. This 480 Volt power then feeds into the Delta-Wye transformer. The transformer's role is to step down this high voltage to a more usable 120/208 Volts. The 120 Volt portion of this output is then specifically used to power the standard receptacles throughout the commercial space.

Goal: Understand the full voltage transformation process from 480V to 120/208V.

Tools and materials

Circuit Breaker — Safely tapping off the 480V supply
Delta-Wye Dry-Type Transformer — Stepping down 480V to 120/208V

What they say

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deltay dry type transformer throughout the facility where needed. Oh, we're going to tap off the 480 volt with a circuit breaker that's going to feed a transformer that's going to step that power down to 12208. >> Okay. Okay. Right. >> And those 120 is what we use to feed our receptacles. >> All right, that makes sense. Cuz I was in this commercial warehouse and I see these things on the wall and I was wondering what they were, what they're

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