House wiring is usually 10-12 AWG gauge or better (right?), and can handle 15 amps, easily.
The gauge of the molex wire ought to be between 14 and 18, which can still take 0.5 amps, very easily.
Voltage is well covered here. As Since87 accurately pointed out, you're also not likely to spark through the wire insulation: these things are usually good up to 300 to 600 Volts (safely, and spec) in general, but if you have an unusually thin insulator, you might opt to use something else.
I believe that you're good to go.
Otherwise, in selecting a wire, one may look for a number of other things, like corrosion protection (for harsh environments), insulation hardness, water-proofing, etc... none of which apply here, but do cover up your wires (heatshring, electrical tape, etc.)
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