A safety code regarding the use of
electricity. The NEC is sponsored by the National Fire Protection Institute.
It is also used by insurance inspectors and by many government bodies
regulating building codes.
NEMA (National Electrical Manufacturers Association):
A nonprofit
trade organization, supported by manufacturers of electrical
apparatus and supplies in the United States. Its standards alleviate
misunderstanding and help buyers select the proper products. NEMA standards
for motors cover frame sizes and dimensions, horsepower ratings,
service factors, temperature rises and various performance characteristics.
Open Circuit:
A break in an electrical circuit that prevents normal current
flow.
Output Horsepower:
The amount of horsepower available at the output
shaft of a gear reducer. Output horsepower is always less than the input
horsepower due to the efficiency of the reducer.
Output Shaft:
The shaft of a speed reducer assembly that is connected
to the load. This may also be called the drive shaft or the slow speed shaft.
Overhung Load:
A force applied at right angles to a shaft beyond the
shaft’s outermost bearing. This shaft-bending load must be supported by
the bearing.
