chevyx92
Senior Member
- Location
- VA BCH, VA
Is this legal? I had never seen this before until now!
Padmount Transformer...
- Thread starter chevyx92
- Start date
- Status
- Location
- Massachusetts
I don't see why not, I have come in and out the sides of pad mounts before.
Jim W in Tampa
Senior Member
- Location
- Tampa Florida
What part confuses you ?
chevyx92
Senior Member
- Location
- VA BCH, VA
Just never seen it out the top before. Have you?
Cow
Senior Member
- Location
- Eastern Oregon
- Occupation
- Electrician
I sure haven't, I've only seen them sitting on vaults.
On second thought, I've seen them come out of the side for wind turbines. But never the top.
kwired
Electron manager
- Location
- NE Nebraska
Most POCO would not allow entering the top or allow the roof above - makes changout more difficult.
kwired
Electron manager
- Location
- NE Nebraska
There is a raceway entering both the primary and secondary sides of the cabinet. Does the primary come from inside the building also?
chevyx92
Senior Member
- Location
- VA BCH, VA
That Im not sure of. I am asuming so since there is conduit going into the primary side like you said.
Ragin Cajun
Senior Member
- Location
- Upstate S.C.
Missed out the top part.
Latest requirements around here is distance from building, doors, etc. That one is way too close to both.
RC
Latest requirements around here is distance from building, doors, etc. That one is way too close to both.
RC
- Location
- Massachusetts
I doubt that this transformer is utility company owned or controlled based on the installation and the fact the primary seems to come from inside the building.
To me it looks customer owned and I see no NEC violation.
To me it looks customer owned and I see no NEC violation.
- Location
- Logan, Utah
I agree, this is most likely a customer owner transformer and I don't see an NEC violation either.
Chris
I agree as well but, if this were a dry type transfomer, I would say there probably would be a violation.
Roger
- Location
- Massachusetts
I have only wired one dry transformer that allowed top entry and it was a big one, I think it was 1000 Kva.
Possible NEC issue: Is the padmount listed for top entry of conduits? Despite the roof, drilling into the top may make water entry possible.
If the padmount has no restrictions on top entry, then I can agree with the majority that there is no problem.
I may go waste some time on some padmount mfg. websites to see what they say about it.
If the padmount has no restrictions on top entry, then I can agree with the majority that there is no problem.
I may go waste some time on some padmount mfg. websites to see what they say about it.
- Location
- Massachusetts
It sure looks like there are Myers hubs on those conduits.
Why would there be?
It is not like a dry transformer where top entery could cook the conductors.
Real_Bostonian
Member
- Location
- Eastern Massachusetts
I don't think it would fly in Mass, transformers hum & vibrate and it's standard practice here to change over to flex to prevent vibrations loosening connections, fittings.
kwired
Electron manager
- Location
- NE Nebraska
You think it is going to vibrate that much? How will they ever keep terminations tight? Or the lock bolt on the door tight?
Real_Bostonian
Member
- Location
- Eastern Massachusetts
I'm just telling you what the common practice is here - motors, generators, transformers that are piped into get a 3 - 4' length of metal flex or liquid tight as a transition to prevent vibrations from loosening fittings, connections. In addition to the vibration from the transformer itself - there's potential vibration from traffic in this install, imho.
- Location
- Massachusetts
I work in MA and we run wireways, conduits and EMT directly into transformers all the time.
Last edited:
- Location
- Massachusetts
So in that case all wiring should be in flex.:roll:
- Status