What type of electrical supply is this? (Canada)
This is, unfortunately typical, poor design of the instructions page. Hopefully the product is engineered better than the instructions.
I believe the instructions are supposed to show &quot;2 CT Sensors&quot; for the first 3 rows of the table. Instead, they only show that for the 3rd row and the table is structured so that it can be instead interpreted as &quot;for the first 2 lines we have no idea how many CT sensors you will actually need, and for the 3rd line, 2 CT Sensors&quot;. Which of course makes no sense whatsoever. That is basically a &quot;formatting problem&quot; - a disconnect between the engineer's scrawl and the desktop publishing person's implementation.
Except that actually, as I think about it a little more, line 2 - 240V 3-wire is not correct. If it were a true &quot;240V only&quot; then it would be 2-wire and 240V. If it were 120V/240V then it would be 3-wire and 120V. Instead it is listed as 3-wire (implying a neutral wire, and therefore 2 wires with CT Sensors, each 120V) and 240V (implying no neutral wire, and therefore only need 1 wire with CT Sensor, 240V). It doesn't add up.
As noted by others, the first item really should be &quot;120/240&quot;. If it was pure 120 (which is possible for very small service) then it would only be 2 wire rather than 3 wire and only 1 CT Sensor - so it does not match the first line, implying that first line, described as &quot;TYPICAL&quot;, really should be &quot;120/240&quot;.