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  1. etbrown4

    Code Question: Residential Elec Equipment Mfg Suggests Running 120v Conductors In Conduit Without Neutral

    Sounds good! Like the bold print! And a fine point. As described, we have a #10 neutral in each conduit with the red and blacks, and as an abundance of caution we have a 3rd neutral in a piece of romex between panel and switch. Sounds like maybe we could or should remove the 3rd neutral to...
  2. etbrown4

    Code Question: Residential Elec Equipment Mfg Suggests Running 120v Conductors In Conduit Without Neutral

    With either gen or utility operation, the 3 reds in each conduit bring power from the panel to the switch and the 3 circuits loop through and go back to the original branch circuit wires in the panel. An expert will have to tell me if the magnetic fields from the red going out and black...
  3. etbrown4

    Code Question: Residential Elec Equipment Mfg Suggests Running 120v Conductors In Conduit Without Neutral

    Gentlemen, One pic shows a 4 circuit, all 120v transfer switch. The other shows a 6 circuit switch with 1 240v circuit and 4 120v circuits. They are basically the same. We're doing all 120v. As I've often said, we ran 2 pvc conduits between tsf sw and main panel at a 14' distance. We ran 3...
  4. etbrown4

    Code Question: Residential Elec Equipment Mfg Suggests Running 120v Conductors In Conduit Without Neutral

    Lionel, you basically have the correct transfer switch. What did you mean by, "No, the "some of them" is this one, the same thing. " If you meant the above pic you posted is right, then we agree. So I'm pretty sure Waross agrees and is on the same page. What I have asked about from the...
  5. etbrown4

    Code Question: Residential Elec Equipment Mfg Suggests Running 120v Conductors In Conduit Without Neutral

    Waross and other comments are most appreciated. Many posters seemed unaware that this type of transfer switch is available. I see it as somewhat like a large 6 pole, 3way switch. I gather that Waross's initial concern over likely magnetic heating "when the gen is connected," is now less a...
  6. etbrown4

    Code Question: Residential Elec Equipment Mfg Suggests Running 120v Conductors In Conduit Without Neutral

    Waross made the statement that there also might be magnetic encirclement with the generator connected. I explained the continuous neutral from the gen, to the receptacle on the transfer switch and back to the panelboard. Clarifying that, do you still have a concern there when the gen is...
  7. etbrown4

    Code Question: Residential Elec Equipment Mfg Suggests Running 120v Conductors In Conduit Without Neutral

    It seems clear that Waross and other posters have a clear understanding of the wiring of the Reliance switch under discussion. As per the Reliance diagram, in our installation, we have run a seperate #10 ground and #10 neutral from the main panel, seperately to the ground terminal and...
  8. etbrown4

    Code Question: Residential Elec Equipment Mfg Suggests Running 120v Conductors In Conduit Without Neutral

    Jgrist, you have the overcurrent protection stated correctly. Think of it this way. The 6 circuits with loads were originally connected to 6) sp 15a breakers in the main panelboard. This particular brand of transfer switch requires that those 6 conductors become detached from their original...
  9. etbrown4

    Code Question: Residential Elec Equipment Mfg Suggests Running 120v Conductors In Conduit Without Neutral

    A similar thread was posted last week but this identifies the issue more clearly. Reliance Controls makes manual residential generator transfer switches and sells them by the thousands. On a 6 circuit 30a transfer switch and panel, Instructions tell the installer to route 6) 120v hot wires...
  10. etbrown4

    Adding Home Generator Transfer Switch, question on Neutral

    Appreciate all the comments! We have multiple applications in several properties with generator or battery backup and some use automatic transfer switches, some manual. Described above, a manual transfer switch, with 6 breakers in the main panelboard supplying 6 circuits in the transfer...
  11. etbrown4

    Adding Home Generator Transfer Switch, question on Neutral

    The purpose of the question is simply to verify if the information provided by the transfer switch manufacturer, i. e. that running the 15a circuits in one conduit and and a #10 neutral and ground separately will operate properly and be safe. It seems clear that if a neutral is not connected...
  12. etbrown4

    Adding Home Generator Transfer Switch, question on Neutral

    6 Breakers in tsf switch panel are 15a. 6 breakers in main panelboard are 15a
  13. etbrown4

    Adding Home Generator Transfer Switch, question on Neutral

    Sounds right. The transfer switch mfg says the ground neutral bond is in the main panel as prior poster mentiomed. Mfg says with one #12 over to the switch, and one #12 back to main panel for each circuit, in Util mode, the main panel breakers provide circuit protection, and in Gen mode, the...
  14. etbrown4

    Adding Home Generator Transfer Switch, question on Neutral

    As a practical matter, if I follow the manufacturer instruction using the single separate 10g neutral should that function properly with that neutral connected to the tsf switch annd to the main panelboard?
  15. etbrown4

    Adding Home Generator Transfer Switch, question on Neutral

    Adding a 6 circuit 30a transfer switch, connecting to main panelboard. Requires a 12g thhn out to the transfer switch and back to main panel for each circuit. Plan to run those 12 conductors in one conduit. Plan to run 10g neutral and ground in a separate cable from main panel to transfer...
  16. etbrown4

    Help calculating voltage drop through storm water

    In theory, the standard practice of utilities seems to be, to not place standard, non submersible 100kva transformers in the 100 year flood plain. Dominion Va Power has nearly completed a 1.4 mile changeover from overhead to underground, with the last .4 mile 10' deep in the floodplain...
  17. etbrown4

    Help calculating voltage drop through storm water

    The challenge with the project described above in OPs estimation is that the power company seemingly treated it as if it was in a standard dry location, and not subject to frequent submersion. We convinced them, with considerable difficulty, to move 5 transformers. So now we're left with 5...
  18. etbrown4

    Help calculating voltage drop through storm water

    Is there a NESC requirement for high voltage splices underwater, that requires something more than crimp connectors and tape?
  19. etbrown4

    Help calculating voltage drop through storm water

    The situation changes... For now the power company says they will relocate 5 transformers to locations above the floodplain, obviously responding to the shock hazards. However they have already run the primary underground to each. So now they intend to apparently use crimp connectors and tape...
  20. etbrown4

    Help calculating voltage drop through storm water

    The power company engineer swears that a live but submerged 100kva transformer is not a safety hazard. ( first thought they were smaller) He went on to say they had short circuit or over current protection. My limited understanding on those, being a non technical person, is that would likely...

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