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480V Transformer in same room as IT Rack

Merry Christmas

msilva94

Member
Location
Allentown, PA, USA
Occupation
Electrical Engineer
I’m dealing with a situation where an electrical panel and a 45kVA 480V transformer need to be placed in the same room as the IT rack. The issue is that the dedicated electrical room doesn’t have the required space, and even if it did, it’s in a locked location on the opposite side of the building, far from the client’s area. In order to provide power for this client, we proposed installing a transformer and panel within their suite. Unfortunately, the client is unwilling to allocate a dedicated electrical room for this purpose.

The IT specialist is concerned about the EMF emitted by the transformer and how they might interfere with the server and UPS, including potential risks like demagnetization. I’ve reassured him that the transformer won’t just become an instant magnet upon activation, and that the 40kVA UPS tower, located right next to the IT rack, might actually pose a greater EMF concern.

I’ve already coordinated with the Mechanical Engineer to ensure proper cooling before relocating to this room, but the IT specialist is still pushing back, worried about the potential impact of the transformer on the server's performance.

He does not want to share his room and has even recommended building a faraday cage over the transformer if it needs to stay.
The room is 8'x10', with the IT rack positioned in the bottom left corner, and the transformer and electrical panel placed in the upper right corner.
There's about 6-7' of diagnol space between the equipment.
He's still fighting hard to get the equipment out, ( grrrrrr 😡💢) and by now I would give in, but I don't have an alternative location.

I've even tried hunting down in the NEC any situations where this not legal (he made mention this is a code violation).

I've had projects in the past where IT Specialists asked to relocate Racks in Electrical Rooms, and EMF never seemed an issue then (anecdotally).

Any agreement that the specialist is in the right and if so, any work arounds/recommendations that aren't building a faraday cage around the transformer? (I'm still internally cringing and laughing)
 

tortuga

Code Historian
Location
Oregon
Occupation
Electrical Design
I dont think there is anything in article 645 prohibiting the transfromer in a IT server room.
For I.T., data center stuff and now larger scale EV charging there is a new trend to use a incoming voltage of 416Y/240, instead of normal 480Y/277.
 

msilva94

Member
Location
Allentown, PA, USA
Occupation
Electrical Engineer
I don't think that you'll find that anywhere in the NEC. Data racks are mounted next to transformers quite often.
Would it be worth to provide an EMF Cabinet or build an Amucor wrapped housing/wall for his server?
I dont think there is anything in article 645 prohibiting the transfromer in a IT server room.
For I.T., data center stuff and now larger scale EV charging there is a new trend to use a incoming voltage of 416Y/240, instead of normal 480Y/277.
Besides maybe supplying a disconnect switch to the transformer, I didn't read any other requirements.
 

Besoeker3

Senior Member
Location
UK
Occupation
Retired Electrical Engineer
I don't think that you'll find that anywhere in the NEC. Data racks are mounted next to transformers quite often.
I'm the Brit here and I have also found that to be the case. And, in an electrical room, they are padlocked.
 

tortuga

Code Historian
Location
Oregon
Occupation
Electrical Design
Besides maybe supplying a disconnect switch to the transformer, I didn't read any other requirements.
One of the interesting things in article 645 is it give you as an Professional Engineer (PE) some leeway on article 220 load calculations.
 

msilva94

Member
Location
Allentown, PA, USA
Occupation
Electrical Engineer
The so-called "IT Guy" is a first class idiot.

(He wants a Faraday cage? Most transformers come with one, it's the bonded/grounded metal enclosure.)
Thank you!
I guarantee you that someone could create a comedy film based off my facial expression upon hearing the crap rolling out of his mouth.
 

tortuga

Code Historian
Location
Oregon
Occupation
Electrical Design
A word of advice, don't listen to IT guys when it comes to code.
To make it even more confusing some of these people have official job titles like 'chief network architect', or 'senior network engineer' , which strongly implies they have a engineering degree and are either a licensed architect when the dont have either. There is a PE up in WA that goes out of his way to file complaints to the state about job titles that mislead the public, he was ignored.
Then I think he sued the engineering board for not enforcing the law and won.
 

ModbusMan

Member
Location
Cleveland, OH
Occupation
Building Automation Engineer
To make it even more confusing some of these people have official job titles like 'chief network architect', or 'senior network engineer' , which strongly implies they have a engineering degree and are either a licensed architect when the dont have either. There is a PE up in WA that goes out of his way to file complaints to the state about job titles that mislead the public, he was ignored.
Then I think he sued the engineering board for not enforcing the law and won.
Yeah, but then you have boards that go too far in enforcement and need to be slapped down by the courts: https://ij.org/press-release/oregon-engineer-wins-traffic-light-timing-lawsuit/
I do have a problem with the titles "architect" and "engineer" being applied in a slapdash manner just to make the job sound more important (the late George Carlin had a great sketch about this), but I would argue that "architect" is a very good description, and "engineer" an acceptable one, of what a lot of networking teams do. Just because they're designing data links instead of buildings doesn't diminish the amount of learning and thought necessary.
 
To make it even more confusing some of these people have official job titles like 'chief network architect', or 'senior network engineer' , which strongly implies they have a engineering degree and are either a licensed architect when the dont have either.
It does not unless you completely ignore the context and language construction. The person controlling a railroad locomotive is called an "engineer" but is not a PE (although they may have an operator's permit for the machine), nor are many "chemical engineers" licensed PE's, either. IME this holds for lots of disciplines- in some ways building architect and civil/structural/electrical/mechanical engineers are the special cases of being licensed as a Professional Engineer (the cap's are important) as many engineering disciplines do not even have a license.

BTW, in the UK the word engineer often equates to the US word machinist, and our locomotive engineer is the UK's driver.
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
I suggest you introduce the client to the IT guy, and tell them to let you know when they agree on a location acceptable to both of them.

But, no, there would be no issues.
 
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