Terminology

AC - Alternating current, air condition(ing)/(er)

AFCI - Arc-fault circuit interrupter 

ATS - Automatic transfer switch

BTU - British thermal unit

CIP - Clean in place

CMMS - Computerized maintenance management software

DC - Direct current

EMT - Electrical metallic tubing

EPA - Environmental Protection Agency

FDA - Food and Drug Administration 

GFCI - Ground fault circuit interrupter

 
HMI - Human Machine Interface

Hz - Hertz

 
I/O - Input Output

LOTO - Lock out tag out

MDR - Motor driver roller 

NEC - National Electrical code

NFPA - National Fire Protection Association

OCPD - Over current protection device

OSHA - Occupational Safety and Health Administration 

 
PLC - Programmable Logic Controller

PM - Preventative maintenance

PSI - Pounds per square inch

RMC - Rigid metallic conduit

SOP - Standard operating procedure

TXV - Thermostatic expansion valve

VAC - Volts alternating current

VDC - Volts direct current 

VFD - Variable frequency drive