Yes, you need a splitter.
If you want a splitter on the cheap, Harbor Freight has really cheap 12 inch
long power extension cords with a triple outlet. Some very skilled surgery,
and some electrical tape and you can isolate the black wire out of the cord.
Plug cord into wall, item into cord, and clamp ammeter around black wire.
The power and neutral wires create opposing magnetic fields which cancell
each other out.
Christopher A. Young
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