BURIAL CABLE - A cable installed directly in the earth without use of an underground conduit. Also called “direct burial cable.”
BUS (BUS BAR) - A conductor, often a heavy strap or bar, used to make a common connection between several circuits.
BUTT BRAIDER - A machine used for braiding or shielding cable or wire. It may be 8, 16, 24, 32, 48, or 64 carriers. These braiders are manufactured by New England Butt Company and operate on the maypole type principal.
BUTYL - Used for any of various synthetic rubbers made by polymerizing isobutylene.
BX - A very common type of armored building wire in various configurations, rated at 600 volt.