HOMETOOLS
Fire Extinguisher — 3D Model
Rotate, zoom, and inspect every part of a 10 lb ABC dry chemical extinguisher
INTERACTIVE · 3D
Classic 10 lb Amerex-style ABC extinguisher
Rotate it like it’s in your hand. Covers everything you’d show a student before a PASS drill.
Pick a part on the left to read what it does, why it matters for NFPA 10 inspections, and how it fails in the field. The model above is not a photo — every curve is math, so you can look at it from any angle a textbook can’t give you.
UL RATING
Decoding the rating: what does 4-A:80-B:C actually mean?
Every UL-listed extinguisher carries a fire-class rating like 2-A:10-B:C, 4-A:80-B:C, or 10-B:C. The number in front of A is graded by water-equivalent suppression. The number in front of B is graded by square-feet of liquid pan-fire. C is pass/fail (no number). Here’s the full decode using a 10 lb Amerex B456 (rated 4-A:80-B:C) as the example.
4-AClass A — wood / paper / cloth
Tested against a stacked wood-crib fire under UL 711. 1-A = 1¼ gallons of water-equivalent suppression. So 4-A ≈ 5 gallons of water on a wood / paper / cloth fire. The number scales linearly: 2-A = ~2.5 gal, 6-A = ~7.5 gal, etc.
80-BClass B — flammable liquids
Tested against a heptane pan-fire under UL 711. The number = square feet of pan-fire a trained operator can extinguish. So 80-B = an 80 sq-ft pan (about 9×9 ft, 2 inches deep). 10-B is the smallest — typical for a 5 lb home unit.
:CClass C — energized electrical
No number — pass/fail only. The C suffix means the agent has been tested non-conductive and is safe on energized electrical equipment up to the test voltage (typically 100 kV). Once the power is off, the underlying fire reverts to Class A or B.
Class D & K aren’t numbered either — they get separate pictograms when present, since they apply only to combustible-metal hazards (D) or commercial cooking oils (K). Multi-class units always list the rating in A → B → C → D → K order, with hyphens within a class and colons between classes (e.g. 4-A:80-B:C).
BONUS
How an Amerex extinguisher is made on the factory floor
BrandmadeTV’s tour of the Trussville, Alabama plant — see the cylinder draw, weld, paint cure, valve assembly, charge, and final QC pressure-test for yourself.
→ Fire Extinguishers (NFPA 10)→ NFPA 10 Study Tool (95 questions)→ Georgia recharge vendor guide→ OSHA extinguisher requirements→ DOT fleet extinguishers
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