Read Electrical Terms and Definitions: text version

Unit 2 ­ Electrical / Wiring / Home Automation

Electrical Terms and Definitions: Amps: the standard unit for measuring electrical current. Watt: a unit of electrical power, equal to the power developed in a circuit by a current of amp flowing through a potential difference of one volt. o 1W [Watt] = 1V [Volt] x 1A [Amp] Voltage: electromotive force expressed in volts. Conductor: that in which electricity can flow through freely. AC [Alternating Current]: movement of electric charge periodically reverses direction.

http://en.wikipedia.org/wiki/Alternating_current

DC [Direct Current]: movement of electric charge moves in only one direction.

http://en.wikipedia.org/wiki/Direct_current

Circuit Breaker: a device that automatically interrupts the flow of an electrical current. Breaker Box: an insulated box on which interconnected circuits are mounted. Electrical Panel: an insulated panel on which electrical wires are mounted. Current Flow: the rate of flow of an electrical charge, generally expressed in amps. Electrical Load: the amount of power delivered by a generator or carried by a circuit. A device to which the power is delivered. Ground-Fault Circuit Interrupter (GFCI): GFCI detects grounding problems and shuts electricity off to prevent a possible accident. Structured High Voltage: the term high voltage applies to electrical equipment that operates at more than 600 Volts (for terminal to terminal operation) or more than 300 Volts (for terminal to ground operation). Low voltage, high current AC or DC power supplies are also considered to be high voltage.

Unknown (May 09, 2007). Electrical Safety. Texas A&M Health Science Center, Chapter III- Electrical Safety. Retrieved http://tamhsc.edu/departments/finance-admin/safety/electrical/electrical_safety.pdf

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Unit 2 ­ Electrical / Wiring / Home Automation

Wiring: Terms & Gauges

Electrical Wire: pliable strand or strands of metal typically wrapped with electrically insulated material. Solid: single strand of metal (typically copper) wrapped with in electrically insulated material. This type of wire is typically less expensive, but also less flexible it is often used for structured wiring. Stranded: multiple strands of wire that are wrapped together to form one wire then wrapped with electrically insulated material.

Cat5: category 5 cable is what is known as a twisted pair. Twisted pairs have two shielded wires or conductors of a single circuit that are twisted together. This twisted form helps to reduce electromagnetic interference (EMI) form outside sources. There are many different types of twisted pair cables Cat5, Cat5e, Cat6 and so on.

Wire Gauge: wire gauge refers to the diameter of the wire measured by American Wire Gauge (AWG). Using the AWG scale the smaller the gauge numbers the larger the diameter of the wire will be. Romex: the term Romex often is used as a generic name for non-metallic sheathed electrical cable typically used in home electrical wiring. Many time Romex is often referred to as 14/2, 14/3, 12/2 and 12/3. 14/2, 14/3, 12/2 and 12/3 AWG: this reference is to the gauge and number of conductors involved. o Example: 14 AWG is the gauge and 2 are the number of insulated conductors that electricity can flow though freely. In a 14/2 there are three wires Black (hot), White (neutral) and bare copper (ground). 14/3 has the same configuration with the addition of another insulated conductor in Red. 14/2 and 14/3 are typical used for basic residential wiring. 14 Vs 12 Gauge: 14 gauge wires are typically used for wiring a 15A circuits. 12 gauge wires are typically used for wiring 20A circuits.

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Unit 2 ­ Electrical / Wiring / Home Automation

Switches: there are several different types of switches some of them are commonly use in the motorized shading industry. All of these switches have applications for both low voltage and line voltage. Single Pole Single Throw Switch (SPST): Simple on and off switch. Example :Light Switch not used in shade applications Single Pole Double Throw Switch (SPDT): This switch is a change over switch allowing a connection to one or the other of its two hot terminals. Used to control a standard dumb motor with the switch up the connection is made to run the motor up, the center or neutral position is off when the down Single Pole Center Off (SPCO): This switch is also commonly knows as a momentary switch as it always returns to an off position if not pressed. Double Pole Single Throw Switch (DPST): This switch is equivalent to two SPST switches. Double Pole Double Throw Switch (DPDT): This switch is equivalent to two SPDT switches. Double Pole Center Off (DPCO): This switch is also commonly knows as a momentary switch as it always returns to an off position if not pressed.

Home Automation: Through the use of computers and various electronic systems many of your homes systems lighting, HVAC, audio, visual and many others can be automated. This can be done on a small or large scale and can incorporate as much or little of the home systems as desired. With the use of a home automation system there are many different ways to incorporate automated shades into the system. Below is a list of the different types of shade motors that ca be integrated into the home automation system. AC Standard Cylindrical Motors: Standard or dumb motors (QIET non-RF & QMS non-RF) some times called a 4 wire motor. When power is supplied to set of wires the motor reacts in the corresponding direction. Sometimes used with a SPDT or DPDT switch. When the opposite set is supplied power the motor reacts in the opposite direction. These motors can be integrated into a home automation system using many different devices that control the power output to the motor; these will be covered in motor controls. DC Standard Cylindrical Motors: Standard or dumb motors that utilize DC will have only two wires. The two wires control the direction of the shade by the polarity or directional flow of power to the motor. These motors can be integrated into a home automation system using many different devices that control the power output to the motor; these will be covered in motor controls. AC Drapery Motor: Standard or dumb motors 110v drapery motor. They are typically used as a stand alone motor system with the use SPDT switch. These motors can be integrated into a home automation system using many different devices that control the power output to the motor; these will be covered in motor controls. DC Dry Contact Closure (DCC) Cylindrical Motor: DCC motors allow for motor control via DCC this allows the motor to utilize 110V power but receive control from dry contact closure. Dry contact closures are commonly used in many applications for home automation situations.

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Unit 2 ­ Electrical / Wiring / Home Automation

AC Radio Frequency (RF) Cylindrical Motors: RF motors (QIET RF & QMS RF) utilize Radio Frequency to operate the motor functions. RF motors are considered semi-intelligent, this means that you are able to program some or all the motor controls. RF motors only require 110v power to operate. RF motors are able to be integrated into home automation systems with the use of RF interface device. DC Radio Frequency (RF) Cylindrical Motors: DC RF motors utilize Radio Frequency to operate the motor functions. RF motors are considered semi-intelligent, this means that you are able to program some or all the motor controls. RF motors only require 12-24V power to operate. RF motors are able to be integrated DC Drapery Motors: DC Drapery motors typically operate by RF or by DCC allowing for maximum flexibility. This dual system allows the motor to be integrated in two different ways depending on the home automation set up. AC Intelligent Cylindrical Motors: These motors sometimes called ILT motors are able to integrate with home automation systems and offer bidirectional feedback. This allows the motor to send and receive specific information that relative to that shade. Such feed back may be status, direction or current position. DC Intelligent Cylindrical Motors: These motors sometimes called ILT motors are able to integrate with home automation systems and offer bidirectional feedback. This allows the motor to send and receive specific information that relative to that shade. Such feed back may be status, direction or current position.

Integration Types: Terms: Serial Communication: Involves sending digital data over communication lines one bit at a time. Recommended Standard 232 (RS-232): Is the common or standard for binary serial data transmission between two devices. Recommended Standard 485 (RS-485): Is the common or standard for binary serial data transmission between two devices. This protocol much like RS-232, but allows for more then two devices on the network or system. Dry Contact Closure (DCC): a switch or connection that does not have a power source running through it. These are often used by the motorized shading business as an override switch. DCC can also be used to connect to integration components by providing a manual connection that can be closed to complete the circuit.

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