Here is the second installment of ‘Deciphering The Code!’. Click here if you would like to view the first installment of ‘Deciphering the Code!’.
National Electrical Manufacturers Association (NEMA): A nonprofit trade association supported by the manufacturers of electrical apparatus and supplies. NEMA is engaged in standardization to facilitate understanding between the manufacturers and users of electrical products.
Amperes: The unit of electric current flow. One ampere will flow when one volt is applied across a resistance of one ohm.
Ohm: A unit of electrical resistance. One volt will cause a current of one ampere to flow through a resistance of one ohm. A device used for measuring electrical resistance is called an ‘Ohmmeter’.
Cold Cranking Amperes (CCA): A standard rating for lead acid batteries; established by BCI (Battery Council International). The Cold Cranking Ampere rating is the current, in amperes, that a battery will deliver for 30 seconds, at 0 degrees F, before the battery will deliver for 30 seconds, at 0 degrees F, before the battery terminal voltage drops to 1.2 volts per cell (7.2 volts for a 12 volt system, and 14.4 volts for a 24 volt system). Lead-acid batteries are generally specified in terms of CCA and reserve capacity.
Program logic controller (PLC): A solid state device capable of storing instructions to implement control functions such as sequencing, timing, counting and data manipulation to control machines and processes.
More acronyms and definitions to follow!