millercarbon
I wouldn't recommend using any device designed for 100VAC on a 120VAC line.
Line voltage is nominal, as in uncalibrated, as in it varies. What is called 110 here in the US can turn out to measure lower ...This is mistaken. Nominal voltage in the US is 120VAC and is regulated by state agencies, such as a Board of Public Utilities. Typically, a tolerance of ±5 percent is allowed.
I wouldn't recommend using any device designed for 100VAC on a 120VAC line.