Lead is not a good conductor of electricity. So, it is not used to make electrical wires.

If you can understand the concepts of Electricity, then I answer in a technical language as:

It has been experimentally proved that the resistivity of lead (Pb) is        

1.9 * 10⁻⁷ Ωm

which is large for using as a conductor.

We have metals with much less resistivity, like Copper(1.68*10⁻⁸ Ωm) and Silver (1.59 * 10⁻⁸ Ωm), etc. So, we just don't use lead.

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Lead is the poor conductor of electricity hence lead not used to make electric wires
electricity will not pass through lead
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