did you get any help I have the same setup in my outlet. only 1 black/live 1 ground and 1 neutral . what do we do with the extra black wire on the unit . I called cutomer service somewhere in asia . and was told to twist the black wires together and she wuld send me a diagram to help install . but diagram clearly says do not twist both live and load together

I'm having same issue. need help please . phone support was no help

I spent about 20 minutes on a live chat session with "Dora" from tech support, who insisted that each of the black wires needs to draw power from a separate source, because one wire controls the light,and the other controls the relay. She neither provided or offered to provide a wiring diagram, or a schematic for the switch, and told me flat out that the HS-200 would not work in my house. I was not impressed with my sole encounter with TP-Link tech support. The circular explanation that it wouldn't work because each wire needed a distinct source made no sense, even as she denied that the switch used two parallel circuits. I just got an RMA from Amazon, and I'm returning the switch. I'll look at smart switches at Home Depot and Lowes later in the week. Basically, I'm wondering who designed the silly thing and insists that most wall switches have two live wires, a neutral, and a ground wire in them. I've only seen that in double gang switches, never in a single gang box - and it certainly isn't shown that way in any of the myriad home improvement books I own. -Kurt

http://community.wemo.com/t5/WEMO-Application/only-have-one-white-and-one-black-wire-coming-out-of-wall/m-p/23466I just purchased a WeMo switch and had the same problem (I came here to see if TP Link would support my current wiring or a 3 way switch).

However, I did eventually get this working. Following a suggestion from a member in a thread on WeMo's support forums, I wired as follows:

1st black from the switch to wall black wire
2nd black from the switch (on the WeMo there is a picture of a lightning bolt above the 2nd wire, not sure about on the TP-Link) to wall white wire
White and green wires from the switch to wall ground wire(s) (green or bare copper)

I do not know the repercussions of installing the switch like this, as I have zero electrical knowledge. My husband tried for an evening and couldn't get it working without running a new neutral wire, I did a little research, tried the above method, and had it working in 5 minutes. So far, so good.

Here are links to two of the resources I used:
http://community.wemo.com/t5/WEMO-Hardware/WeMo-Light-Switch-Installation-Problems/td-p/1970
http://community.wemo.com/t5/WEMO-Application/only-have-one-white-and-one-black-wire-coming-out-of-wall/m-p/23466

@mylowes 

Using the ground as a neutral can hurt/kill someone if they remove the ground at the breaker pannel.

Who are these trolls advertising their lowlife website while trying to kill people.

Thank you!