To get the best efficiency for my battery backup system I want to make sure that the backup battery is large enough to cope with at least twice the total amp hours required in my calculations. So, in ...

In this episode of “EC&M Tech Talks,” Randy Barnett, a journeyman electrician, inspector, author, trainer, and electrical safety expert, reviews the installation requirements for generators in Art.

Emergency systems [Art. 700]. These are generally used to provide power so occupants can safely exit in the event of fire or other disaster. Other uses include providing ventilation essential to ...