Question: what is the difference between 1 gauge and 1 0 gauge?
Answer: The number in front of the "/" is how many zeros the gauge is. 1/0 is 0 AWG, 2/0 is 00 AWG, 3/0 is 000 AWG and so on with more zeros being thicker wire. ... Basically it can be used as either 1 or 0 gauge. The size difference between the two of them is not significant.