Here is a link that seems to do a good job explaining fire extinguisers. For instance the "5" in the 5 B-C noted in the VCCA requirement means that the extinguisher will cover 5 square feet.
You can read more at: https://www.selectsafetysales.com/t-Fire-Extinguishers-Classes-Types-And-Use.aspx


My old truck's still running good, my ticker's ticking like they say it should, I got supper in the oven, a good woman's loving, and even my bad days aint that bad...Yeah, I'm a lucky man!
1953 Chevy 3100 Shortbed

1965 C-30 Panel Truck
1963 C-20 Long/Fleet Pick-up California Black Plate