What pieces will I need?

Support
1

I know for sure that I need the following:

  • Standard Base
  • USB PS
  • Reference Transformer
  • (2) 100Ax16mm for the 100A panel? Or do I only need 1?

Now - I would prefer to monitor each plug that plugs into each outlet so that I don’t have to isolate each plug per breaker, but not sure that can be done. If not, I guess I have to isolate or buy something else like a PDU.

My equipment is:

  1. (1) 120VAC
  2. (2) 240VAC

That is what I have so far in my panel, but the plan is to expand.

For each 120VAC, do I need a single 50Ax10mm?

For each 240VAC, do I need a single 50Ax10mm as well?

And, then, is there any way to put it around the power cord itself?

Thanks in advance, sorry for the dumb questions :slight_smile:

2

If you are in North America or Japan, probably two as they are split-phase. Other countries, usually with 230V are single phase and you need one.

Monitor’s per-circuit, not per plug. You may want to look at disaggregation technology for that.

If you want to monitor than individually. If you want to aggregate two or more into a single metric, then you can bundle their conductors into one CT.

Depends. Please see the documentation

No, the CT goes around only one of the conductors, you will get a zero reading around the two conductor cord as the current flows equally in both conductors inside the cord and cancel each other out…

3

I’m in the US. Pretty simple panel, really :slight_smile: Here is how it is laid out:

[2 new items added to shared album] Panel

Hopefully you can see that. Essentially (2) 240VAC double-pole breakers on the left and (2) 120VAC
single-pole breakers on the right.

4

so… do I then need a 50Ax10mm on each of the 4 black wires, I assume?

5

From the picture the 240V loads appear to be two-wire so yes, they can be measured with one CT and the two 120V loads can be measured with 50A CTs. So yes, it appears 4 x 50A CTs will do the trick.

1 Like
6

I received everything. The IoTaWatt itself came with the USB power and reference power. The D-Shell on the USB power is too short or the female side is recessed too much to work. If I push with the force of 1000 horses, it will finally turn the light green - but of course when I stop pushing the power turns off once again.

Question: Is it a basic USB d-shell connection that I could use with any other power supply? I would assume any 1 amp micro-usb would be fine.

7

The answer appears to be yes. Now I just have to let this thing ride since I’m not sure if I hooked the inputs up correctly :slight_smile:

I have:

  • 120VAC Input 1 - CT / AcuCT-H040-50
  • 240VAC Input 2 - CT / AcuCT-H040-50, Double
  • 240VAC Input 3 - CT / AcuCT-H040-50, Double

I am getting values in Graph+, just not quite what I expected yet. Will see as I watch more.