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Shielded, twisted pair wire for Lochinvar cascade feature.

JohnNYJohnNY Member Posts: 2,497
Hello, all. Does anyone have a source for buying a small quantity of shielded, twisted pair wire that I can use to link two boilers?
Many thanks,
John Cataneo
For troubleshooting and private consulting services, find John "JohnNY" Cataneo here at :
"72°F Mechanical, LLC"
Or email John at [email protected]
John is the Boilers and Hydronic Heating Systems Course Instructor at NYC's Mechanics Institute, a professional Master Plumber, licensed by The Department of Buildings of The City of New York, and works extensively in NYC while consulting for clients in and out of state.
For residential service and installations in New Jersey, please see Toro Plumbing & Mechanical and fill out our contacts page, upload pics, and submit, or call (973-672-1000).

Comments

  • ratioratio Member Posts: 2,563
    Around here, one can get a cut of wire at an electrical supply house without too much difficulty, most|all of them carry at least something shielded. Online comes to mind, if you've got time to wait.

    A 500' roll of 18/3 stranded shielded plenum-rated wire is only around $100. I know I'd hate to buy that much when I only need a few feet, but if it's a get'r'dun today kind of thing, that might be the fastest, if the electrical supply houses don't want to make a cut for you.

    JohnNY
  • mattmia2mattmia2 Member Posts: 1,880
    just buy a cat 6a cable. is the actual impedance important?
    ChrisJ
  • mattmia2mattmia2 Member Posts: 1,880
    Also, this place will cut a lot of different cables:
    https://www.wireandcableyourway.com/
    JohnNY
  • mattmia2mattmia2 Member Posts: 1,880
    Looking at the manual, it looks like virtually any shielded 1 pair control cable would work.
  • hot_rodhot_rod Member Posts: 13,855
    I bought this for some solar sensor wiring.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
    JohnNY
  • Gary Jansen_4Gary Jansen_4 Member Posts: 71
    I would think that most hardware stores and electronic shops would sell it by the foot.
    That's how it is in Wisconsin.

    That being said, I can't count the number of boilers, including Lochinvar, that I have used standard 18-2 thermostat wire for communication, and it has worked just fine.
    Thanks Gary
  • HVACNUTHVACNUT Member Posts: 3,517
    Does Lochinvar recommend shielded cable or is there the chance of interference to other equipment?
  • ZmanZman Member Posts: 6,005
    Lochinvar recommends it. Controls companies use miles of shielded wire. I usually grab some drops from a buddy that does controls work.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • JohnNYJohnNY Member Posts: 2,497
    mattmia2 said:

    just buy a cat 6a cable. is the actual impedance important?

    No, it's not. Thank you.
    For troubleshooting and private consulting services, find John "JohnNY" Cataneo here at :
    "72°F Mechanical, LLC"
    Or email John at [email protected]
    John is the Boilers and Hydronic Heating Systems Course Instructor at NYC's Mechanics Institute, a professional Master Plumber, licensed by The Department of Buildings of The City of New York, and works extensively in NYC while consulting for clients in and out of state.
    For residential service and installations in New Jersey, please see Toro Plumbing & Mechanical and fill out our contacts page, upload pics, and submit, or call (973-672-1000).
  • Gary Jansen_4Gary Jansen_4 Member Posts: 71
    How much do you need?
    I have tons of the stuff?
  • mattmia2mattmia2 Member Posts: 1,880
    The shield usually isn't important until you get in an environment where it is then you end up with weird intermittent issues.

    It also might not be to protect its signaling from interference but to keep its emissions within part 15 limits.
    ratio
  • HVACNUTHVACNUT Member Posts: 3,517
    Part 15, part 16. Whatever it takes.
    JohnNY
  • JohnNYJohnNY Member Posts: 2,497

    How much do you need?

    I have tons of the stuff?

    I need about 7 feet of the stuff but maybe I should just buy a roll.
    For troubleshooting and private consulting services, find John "JohnNY" Cataneo here at :
    "72°F Mechanical, LLC"
    Or email John at [email protected]
    John is the Boilers and Hydronic Heating Systems Course Instructor at NYC's Mechanics Institute, a professional Master Plumber, licensed by The Department of Buildings of The City of New York, and works extensively in NYC while consulting for clients in and out of state.
    For residential service and installations in New Jersey, please see Toro Plumbing & Mechanical and fill out our contacts page, upload pics, and submit, or call (973-672-1000).
  • Gary Jansen_4Gary Jansen_4 Member Posts: 71
    I'll send some out today.
    Thanks Gary
  • Gary Jansen_4Gary Jansen_4 Member Posts: 71
    If you are cascading 2 lochinvar boilers, then I am assuming you are running a header sensor. And possibly an outdoor sensor.
    Do you need the shielded wire for those 2 sensors also?
    Thanks Gary
  • JohnNYJohnNY Member Posts: 2,497

    I'll send some out today.

    Thanks Gary

    Gary, thank you so much. That's fantastic and very generous of you. The two sensors don't require shielded cable. Again, I'm very grateful.
    For troubleshooting and private consulting services, find John "JohnNY" Cataneo here at :
    "72°F Mechanical, LLC"
    Or email John at [email protected]
    John is the Boilers and Hydronic Heating Systems Course Instructor at NYC's Mechanics Institute, a professional Master Plumber, licensed by The Department of Buildings of The City of New York, and works extensively in NYC while consulting for clients in and out of state.
    For residential service and installations in New Jersey, please see Toro Plumbing & Mechanical and fill out our contacts page, upload pics, and submit, or call (973-672-1000).
  • WellnessWellness Member Posts: 106
    edited June 14
    Not sure what Lochinvar's requirements are, but shielded twisted pair cable is often incorrectly provisioned in computer network environments without grounding, thereby defeating the whole purpose of having the shield. It's not simply a matter of terminating the wire leads.
    mattmia2
  • mattmia2mattmia2 Member Posts: 1,880
    Wellness said:

    Not sure what Lochinvar's requirements are, but shielded twisted pair cable is often incorrectly provisioned in computer network environments without grounding, thereby defeating the whole purpose of having the shield. It's not simply a matter of terminating the wire leads.

    The shield does block some types of noise without a low impedance at RF connection to ground, but for other types of noise the shield has to be properly prepared and connected to a shielded modular connector or jack.
  • JohnNYJohnNY Member Posts: 2,497
    Received, @Gary Jansen_4 !! Thanks a million! I hope I can do something for you some day.
    For troubleshooting and private consulting services, find John "JohnNY" Cataneo here at :
    "72°F Mechanical, LLC"
    Or email John at [email protected]
    John is the Boilers and Hydronic Heating Systems Course Instructor at NYC's Mechanics Institute, a professional Master Plumber, licensed by The Department of Buildings of The City of New York, and works extensively in NYC while consulting for clients in and out of state.
    For residential service and installations in New Jersey, please see Toro Plumbing & Mechanical and fill out our contacts page, upload pics, and submit, or call (973-672-1000).
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