basic electrical installation work pdf

The pedestal can either be integrated in the stator frame, or can be mounted separately.
It is a hollow cylinder.
Authorities having legal jurisdiction over electrical installations adopt the code for mandatory application (.e.
Tenv motors can be used indoors or outdoors.2- Stator Stator The motor stator consists of two main parts: A- Stator Core The stator is the stationary part of the motor's electromagnetic circuit.Division I locations normally have hazardous materials present in the atmosphere.Since the ball is a sphere, it only contacts the inner and outer race at a very small point, which helps it to spin very smoothly.8- Slot/Teeth For mechanical support, protection from abrasion, and further electrical insulation, non-conducting slot liners are often wedged between the coils and the slot walls.An XP motor is similar in appearance to a tefc motor, however, most XP enclosures are cast iron.The electric power utility) to the wiring system of the premises served.
Nominal Voltage is the value assigned to a circuit to conveniently designate its voltage class (e.g.
Ungrounded conductor - A current carrying conductor not connected to ground.
When the assembled motor is in operation, the stator windings are connected directly to the power source.
When this loop is surrounded by the field of another magnet, the loop will turn, producing a force (called torque) that results in mechanical motion.
It states the voltage of a circuit in volts is equal to the product of the amperage in amperes and the resistance in ohms.
There are two categories of enclosures as follows: Open Enclosure.
Watt - the unit of power or rate of work represented by a current of one ampere under a pressure of one volt (abbreviated w or W).Phase the point or stage in the period to which the rotation, oscillation, or variation has advanced relative to a standard position or starting point.This means that they are suitable for the accommodation of combined loads such as simultaneously acting radial and axial loads in vertical machines.Alternating Current - a periodic electric current that reverses its direction at regular intervals.The vents are positioned so that liquids and solids falling from above at angles up to 15 from vertical cannot enter the interior of the motor when the motor is mounted on a horizontal surface.The industrial electrician is responsible for the installation of electrical service, power, lighting, and special systems in new construction; the changeover from old systems to new in established industrial buildings; the provision of additional electrical capacity to meet the growth requirements of an industrial building;.The stator core is made up of many thin metal sheets, called laminations.