Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations SDETERS on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. AppleJaxJap

    VISTA SWITCH connection

    I have a six-way S&C Vista switch model 615. In this switch five of the ways have OCP, and one of them is not. Typically, how would the feeder connect? Would enter through a relayed connection or the non-relayed connection. I believe it can be either way, but Is there a typical or an advantage...
  2. AppleJaxJap

    Wire Amps, for give size.

    If I had rectangular strips of copper that were not industry standard size so no ampacity table existed for them. How would I calculate Ampacity? It seems that trying to match a specific circular mill area in the standard wire is not accurate. I guess another way to ask is what is the ampacity...
  3. AppleJaxJap

    small XMFR

    I want 240 L-N Can i Ground X4 tie x2 and x3 togather and use X1 wire to the device would be x4=N and x1=L 240V L-N should work but the connection diagram is not showing it This is your life and its ending one moment at a time.
  4. AppleJaxJap

    3 wire vs 4 wire ATS with no GFI Concern

    I have 2 non-utility transformers (480-415/240) that are solidly grounded in 2 different buildings. Building A has a single aforementioned transformer Building B has the second aforementioned transformer and an ATS and the load I want to feed the 3phase 4 wire load with the transformer through...
  5. AppleJaxJap

    One disconnect for both primary and secondary for small transformer

    any issues with this installation? [ol 1] I know that the disconnect would need to be labeled for different voltages. I Disconnect, XMFR, and Load are all located on the same steal light pole. I All fuses 600V class. I Disconnect and XMFR are within a foot of each other. Load is on top of light...
  6. AppleJaxJap

    Nominal vs Float DC arcflach calculations

    can not find guidance in 70E or IEEE. This issue makes VERY little difference in the calculation BUT I still want the reference UPS 40 bats @ 12V = 480Vdc But Float voltage is 2.25V Per Cell so the actual voltage on the bus when maintenance is being done is 2.25 x 6 x 40 = 540Vdc I use the...
  7. AppleJaxJap

    Fault Current on Generators

    I have a generator for a project. in this example it is a 2000KW/2500KVA .8 PF and 480V so the full load amps @ 80% PF is 3007A However, if this same generator was running at unity power factor then the most amps that I could get from it is 2406A. The X”d for this unit is let’s say 10% This...

Part and Inventory Search