Andy1845c
Member
- Location
- Southern Minnesota
The project I worked on today was installing a step down transformer. Its a 480-208 delta/wye. feeds a 208 compressor in an area where only 480 is available. I know it would have been cheaper to get a delta delta transformer but this one was readily available and that mattered.
We have: 480v MCC bucket - unfused disconnect (existing) - 480/208 transformer - fused disconnect - air compressor
My question is the journeyman I was with said we need to bring the neutral to the disconnect. All the transformer will ever feed is this air compressor. No panel. No single phase circuits. So we have a full sized neutral wire coming up to the neutral point on the disconnect, bonding screw installed and from there its tied to building steel.
Is there something in the code that prevents not running the neutral to the disconnect at all and tying the neutral to building steel at the transformer? Its all piped in EMT and grounding conductors are installed.
Im about 10 weeks out from being able to take my test and have been trying to research things I question. Id love to hear some thoughts or code references I should visit.
Thanks guys!
We have: 480v MCC bucket - unfused disconnect (existing) - 480/208 transformer - fused disconnect - air compressor
My question is the journeyman I was with said we need to bring the neutral to the disconnect. All the transformer will ever feed is this air compressor. No panel. No single phase circuits. So we have a full sized neutral wire coming up to the neutral point on the disconnect, bonding screw installed and from there its tied to building steel.
Is there something in the code that prevents not running the neutral to the disconnect at all and tying the neutral to building steel at the transformer? Its all piped in EMT and grounding conductors are installed.
Im about 10 weeks out from being able to take my test and have been trying to research things I question. Id love to hear some thoughts or code references I should visit.
Thanks guys!