Results 1 to 7 of 7
  1. #1
    Join Date
    Mar 2007
    Location
    Capistrano Beach, CA
    Posts
    1,510

    Question Energy Monitoring Products - What is it?

    I had a "What is it?" question come through my e-mail so I thought I'd share it here.

    The answer as I understand it is a device/meter for separate tenant billing.

    Here is some info.

    E-Mon D-Mon Class 1000 Meters

    Similar Threads:
    ***IMPORTANT*** You Need To Register To View Images ***IMPORTANT*** You Need To Register To View Images
    Member Benefits1
    View The List Of InspectionNews Member Benefits!

    -----------------
    Sincerely,
    Brian Hannigan
    InspectionNews.net / InspectionReferral.com
    Helping Inspectors $ucceed Since 1997TM

    Facebook: https://www.facebook.com/InspectionNews
    Twitter: @InspectionNews

  2. #2
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Energy Monitoring Products - What is it?

    Brian,

    That's got me scratching my head ... that would only work (as shown in the photo and material) if each phase supplied one tenant, but that would mean there would be no 240/208 volt circuits, just all 120 volt circuits.

    Those were also advertised as being good for separating the load from different departments in one tenant, and that would be done by installing those on the branch circuits feeding that department.

    Right now, though, for the photo shown, I'm still trying to figure it out - they are using other than just 120 volt circuits.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  3. #3
    Join Date
    Mar 2007
    Location
    Charlotte NC Licensed in NC and SC
    Posts
    597

    Default Re: Energy Monitoring Products - What is it?


  4. #4
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Energy Monitoring Products - What is it?

    Bruce,

    I did check out all those links.

    But ... if you put a current sensing coil on each phase, it will read what is going through each phase, not what is being tapped off a breaker below.

    Thus, unless each tenant ONLY has a single phase and the neutral (i.e., 120 volts) how can you tell what Tenant A used between A and B phases and Tenant B used between B and C phase and Tenant C used between phases C and A?

    I'm stumped.

    Now, if you only had Tenant A on phases A and B and Tenant C on phases B and C, then yes, you don't even need to measure phase B, only Tenant A is on phase A and only Tenant B is on phase C, with phase B being combined load between them, but who cares, you can measure phases A and C.

    Right?

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  5. #5
    Join Date
    Mar 2007
    Location
    Charlotte NC Licensed in NC and SC
    Posts
    597

    Default Re: Energy Monitoring Products - What is it?

    Looks like you have to use the Class 4000 meter for multi-family.

    The docs. for the 4000 are not correct, the links come up with 1000,2000,3000 series wiring and not the 4000.

    E-Mon D-Mon Class 4000 Meters

    It takes more wiring and sensors for the 4000 and they don't have a diagram available on the site.


  6. #6
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Energy Monitoring Products - What is it?

    Quote Originally Posted by Fritz Kelly View Post
    I have seen similar boxes put on by the power company, presumably if they think the meter is bypassed or something. I saw one on a neighboring unit when I was renting a commercial space but don't know if there were the coils in the panel.
    Fritz,

    I think you saw CT's, Current Transformers, which monitored the current flow through the conductors and displayed the power used on the CT meter. There is a direct relationship between the current through those coils and the voltage output from those coils (they work the same way a transformer works - based on the magnetic fields generated by ac current flow), the voltage output is used to run the power meter and record the power used. I've seen these on several large homes with large amp services.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  7. #7
    TOM DEEHAN's Avatar
    TOM DEEHAN Guest

    Default Re: Energy Monitoring Products - What is it?

    It appears to be a 3 phase panel, could there be one breaker per tenant and the single ones are for common areas in the building?


Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •