Question

primary electric shocks come from a welding machines internal wiring and usually are much more dangerous than secondary electric shocks. you can receive a welding machines that have been installed by a trained electrician from touching electrically hot components inside a welding machine or welding device lead your work area or work surfaces your ppe

Explanation:

Primary electric shocks from welding machines originate from internal wiring. The option "From touching electrically hot components inside a welding machine or welding device lead" directly relates to internal sources.

Answer:

From touching electrically hot components inside a welding machine or welding device lead