Disconnect Over Floor Mounted Transformer
- Thread starter blues
- Start date
- Status
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
Yes, it is a violation. I see a couple of other issues as well in the photo.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
No good in my book. You need to buy some more strut.
Need conduit supports?
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Do you mean on the flex parts? Not my work, just saw this in a machine room. IMO it's kind of ugly the way the flex comes into the top of the disco.
rambojoe
Senior Member
- Location
- phoenix az
- Occupation
- Wireman
odd that the disco doesn't look fused.. the penetration for the emt looks to be a little out of the specified area..
follybeacher
Member
- Location
- USA
- Occupation
- Estimator
I was thinking it was the non-supported EMT within 3' of box...
- Location
- Lockport, IL
- Occupation
- Retired Electrical Engineer
The disconnect can be directly over the transformer. But the front face of the disconnect has to be within 6 inches of the front face of the transformer.
As to whether the disconnect needs to be fused, I cannot tell from the photo what is feeding what. If power comes from an upstream overcurrent device, through the disconnect (serving as a local disconnecting means), then to the transformer primary side, then no fuse is needed at the disconnect.
As to whether the disconnect needs to be fused, I cannot tell from the photo what is feeding what. If power comes from an upstream overcurrent device, through the disconnect (serving as a local disconnecting means), then to the transformer primary side, then no fuse is needed at the disconnect.
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
One more caution, depending on what is upstream: The SCCR of non-fused disconnects is often lower than that for similar fused disconnects, so you need to have some idea what the available fault current is at the disconnect.
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
Looks like that concentric KO is holding on for dear life....Until the manufacturers stop this concentric/eccentric KO nonsense, use reducers.
rambojoe
Senior Member
- Location
- phoenix az
- Occupation
- Wireman
that depends on voltage.. drill your own holes- and drill them in the correct area in equipment...
kwired
Electron manager
- Location
- NE Nebraska
I agree. Plus if it is a non fused disconnect, some AHJ's don't require 110.26 working clearance. NEC is somewhat vague as to what 110.26 does and does not apply to. Some will say if it has overcurrent protection it is more likely to be examined, adjusted, etc while energized, but if just a switch there is little/nothing to examine or adjust.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
The heck that isn’t important for that disco to be examined, fused or not.
You wanna pop the cover off that tranny without verifying that it’s dead! Not me.
Fused or infused, I say 110.26 working clearance applies to that disco.
110.26 would not apply to the transformer.
kwired
Electron manager
- Location
- NE Nebraska
I won't disagree with you, but also consider code doesn't require such a disconnect to be within sight of the transformer, one might be opening it with PPE on then confirm if it is energized or not.
- Status