Guidelines for various types of
electrical enclosures are provided the National Electrical
Manufacturers Association (NEMA).
Erasable Programmable type semiconductor memory often used for storage data
Read Only Memory (EPROM) programs that change infrequently, all.
Enclosure protective housing.
EPROMs retain their contents when power turned off.
Encoder Often refers digital device that provides angular position
information.The contents EEPROM chips are erased
with electrical pulses rather than with ultraviolet light with
erasable programmable read only memory. EEPROMs retain
their contents when power turned off.
Explosion Proof (XP) motor enclosure type used hazardous locations.
M
Motor
Drive
Tachometer
or Encoder
Feedback
Feeder Often refers set conductors that originates main
distribution center and supplies power one more
secondary branch distribution centers.
Farad The basic unit capacitance. Other types of
encoders provide digital signal representative absolute
position. Explosion
proof enclosures are also available for other types equipment.The symbol for the farad “F
. and International
Electrotechnical Commission (IEC). Some encoders provide this information as
incremental pulses position changes. EPROMs must
be removed from the circuit erased and reprogrammed.
”
Feedback signal provided control circuit that representative an
actual condition machine process.13
Electrically Erasable type semiconductor memory often used for storage of
Programmable Read Only data programs that change less frequently than random
Memory (EEPROM) access memory.
Feeders
Branches
Transformer Secondary Voltage
120/208 VAC, 3-Phase, 4-Wire
208 VAC
Electric
Heater
208 VAC
Parking Lot
Lighting
120 VAC
Lighting and
Receptacles
208 VAC
Air Conditioner
