Re: [CAD_CAM_EDM_DRO] Transformer question

JJ, For a 110V system, hook your neutral (should be a white
wire) to the COM or 0V terminal or leadwire on the
transformer primary, and your 'hot' lead (should be a black
wire) to the 110V terminal (or lead). Tape, or otherwise
insulate the 220V terminal/lead to prevent getting a shock.
If you have 220V service, same procedure, except 'hot'
lead to the 220V terminal, and tape up the 110V terminal.
Standard designation, I was taught was to hyphenate (-)
tapped windings, and slash (/) reconnectable windings, i'e'
110v-220v, or 110v/220v.

I guess the 110V connection could be called 'half-coil'.
Just make sure if you're using the 110V side, to be sure
they are the biggest Pri Wires. Practically all designs of
a 110-220V tapped xfmr, would, for example, if using 16 ga
for the 110v section, use 19 ga (only half the size of 16
ga) for the 110 to 220 leg. When I designed transformers, I
always preferred a re-connectable Pri and Sec configuration
because fewer wire sizes, and increased efficiency.

RayHex

p.s. As you said, "...Be Careful...
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> From: JJ <jj5412@...>
>
> Okay, my turn for a power supply question.
> My transformer has a center tapped primary, 110v/220v. Do

I connect the

> two outer legs together and use them with the center tap

for 110v? Or

> use it half-coil <g> and use one leg and the center tap.