Switch question
- Thread starter defishu
- Start date
- Status
- Location
- San Francisco Bay Area, CA, USA
- Occupation
- Electrical Engineer
Not sure I follow your question. Please give all of the pertinent details. What are you trying to do, at what voltage / phase / current, under what conditions etc. etc. etc.
"Switch" is not a very descriptive term, even "disconnect switch" is not that much more helpful. There are literally hundreds of different kinds out there.
"Switch" is not a very descriptive term, even "disconnect switch" is not that much more helpful. There are literally hundreds of different kinds out there.
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
defishu:
What I interpret from your post is that rather than having one disconnect controlling one feeder circuit that goes to multiple panels you are looking for a switch with enough independent poles that you can interrupt all the hot leads of several independent circuits.
If that is the case, and if you are thinking of the knife switch type units in an enclosure with an external operating handle, I do not know of any that routinely offer more than just 2 or 3 poles for one single phase or three phase circuit.
What I interpret from your post is that rather than having one disconnect controlling one feeder circuit that goes to multiple panels you are looking for a switch with enough independent poles that you can interrupt all the hot leads of several independent circuits.
If that is the case, and if you are thinking of the knife switch type units in an enclosure with an external operating handle, I do not know of any that routinely offer more than just 2 or 3 poles for one single phase or three phase circuit.
does this one mean we can have a maximum of 6 fuses, and each of them can handle a panel or feed the equipment?
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
That looks to me like a three pole switch with only three fuseholders, but two lugs per each side of each pole - designed for paralleling two conductors per line.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Square D has four and six pole "Safety switches" in their catalog.
Don't really know if there is a specific intended use for them though, never seen one in the wild either.
Don't really know if there is a specific intended use for them though, never seen one in the wild either.
ptonsparky
Tom
- Occupation
- EC - retired
Maximum of six disconnects, not fuses.
This disconnect switch could serve more than one load depending on how you use rules governing Taps.
MTW
Senior Member
- Location
- SE Michigan
4P used for where you need to switch the neutral, such as a hazardous location.
6P used as motor disconnect for a two speed, two winding. Used several of em back it the day before VFD's were common.
MTW
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
FionaZuppa
Senior Member
- Location
- AZ
- Occupation
- Part Time Electrician (semi retired, old) - EE retired.
that pic posted, its a "3pole fused" disco.
ptonsparky
Tom
- Occupation
- EC - retired
Yes, we agree.
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