Question

What is Primary Power? The high-amperage, low-voltage welding current. The high voltage, low amperage power supplied by the power utility or generator. The low-voltage, high-amperage power supplied by the power utility or generator. The low-amperage, high-voltage welding current.​

Answer 1

Primary power in welding is often referred to as the input line voltage and amperage available to the welding machine from the shop’s main power line. It is often expressed in watts or kilowatts (KW) and is typically AC. It can be either single-phase or three-phase. None of the options you mentioned are correct definitions of primary power in welding.