Class I
Encyclopedia
Class I may refer to:
- Class I appliance, a device constructed according to electrical grounding specifications in the IEC 60536-2 standard
- Class I bacteriocin, a type of toxin produced by some bacteria
- Class I biosafety cabinetBiosafety cabinetA biosafety cabinet — also called biological safety cabinet or microbiological safety cabinet — is an enclosed, ventilated laboratory workspace for safely working with materials contaminated with pathogens requiring a defined biosafety level. Several different types of BSC exist, differentiated...
- Class I laser, a type of eye-safe laser defined in the ANSI Z136 standard
- Class I rail carrier, a type of major freight railroad company in Canada
- Class I railroadClass I railroadA Class I railroad in the United States and Mexico, or a Class I rail carrier in Canada, is a large freight railroad company, as classified based on operating revenue.Smaller railroads are classified as Class II and Class III...
, a type of major freight railroad company in the United States