A __________________________ starts or stops the flow of current by closing or opening the contacts of a control device.

Q: In Lock-Out Tag-Out which energy sources must be removed from the system?

A: LOCKOUT/TAGOUT (LOTO); Lock out, tag out (LOTO) is a safety practise that ensures that dangerous…

Q: The following is a layout of a lighting circuit for the bathroom and hallway. Using the cable layout…

A: Given the layout of a lighting circuit for the bathroom and hallway:

Q: Microwave Oven an open loop or closed loop system?

A: Open Loop System- A control system in which the input of the system does not depends on the output…

Q: List down the different types of Cables.

A: Dependig on the purpose of use cables are classified in to five types1)Shielded cables2)Fibre optic…

Q: When installing a telephone system in a building, a conduit is installed in a riser. Is it okay to…

A: The most preferable method used in horizontal cable Installation for communication cabling is by…

Q: . Identify and explain the safety procedures and precautions that should be followed for fire…

A: There is always a danger when installing some form of wire or wiring system. If the wires are not…

Q: a) State three each: “ DOs “ and “ DON"Ts “ associated with electrical equipment operation on board…

A: DOs :  1 ) don't touch any device because we have to treat any electrical device like it is highly…

Q: what wire size is needed on a one 20 amp, 120-volt laundry branch circuit? what wire size is needed…

A: 12 gauge what wire size is needed on a one 20 amp, 120-volt laundry branch circuit.

Q: Show the connections for a ceiling outlet that is to be controlled from any one of three switch…

A: The given figure consists of the 120 V source, two three-way switch, and one four-way switch. it is…

Q: Does the NEC make suggestions about how to wire a house that will be occupied by handicapped…

A: The NEC is the electrical code that is accepted by everyone belongs to the electrical industry. NEC…

Q: What is the purpose of the NEC®?

A: NEC stands for National Electrical Code. It was developed in 1897.

Q: Q.1: Non-metallic conduit must not be installed where extremes of ambient temperature, why?

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Identify and explain the safety procedures and precautions when working with tools and equipment's…

A: Electrical cables are used for transferring the signals and are also used for long distance…

Q: what wire size is needed on a one 20 amp, 120-volt bathroom circuit? what wire size is needed on a…

A: Proper wire size is an important fact to be considered in any of the electrical wiring installation.…

Q: What is the branch circuit protective device?

A: Branch circuit protective device is used to protect the motor winding and insulation if due to some…

Q: With neat diagram explain the working of motor used in elevators.

A: The motor used for the elevator is a Cumulative compound DC motor, as during the starting high…

Q: When the nameplate of HVAC equipment is marked “Maximum Size Fuse—50 Amperes,” is it permitted to…

A: The device that have the maximum size are generally air conditioner and the refrigerator have the…

Q: what section of the code prohibits supporting telephone wires from raceways that contain light or…

A: N.E.C. ARTICLE 820 article covers coaxial cable distribution of radio frequency signals or covers…

Q: When installing ceiling-suspended (paddle) fans, per the requirements found in NEC 314.27(C) and NEC…

A: The National Electrical Code (NEC) is a regionally adoptable standard for the safe installation of…

Q: Using the image above, what type of contact is used to turn on the "LIGHTS"?

A: here as shown in the ladder diagram two switch S1 and S2 are used to turn off or on the Lights.

Q: Identify and explain the safety procedures and precautions that should be followed for fire…

A: Procedure that is used to install cable in buildings are as follows:- Electrical conduction  for…

Q: Identify and explain the safety procedures and precautions that should be followed for fire…

A: Safety precautions for fire  prevention - Always Get Ready with the emergency plan Training of…

Q: List the methods by which an equipment grounding conductor is connected to a device box

A:

Q: 8. What are the common protective links for electrical control lines and what electrical components…

A: Various protective devices or links are used in the electrical control line of the power system.…

Q: How is a metal faceplate grounded when using a non-metallic box?

A: The metal faceplate is grounded using the non-metallic box is as follows;  - For a metal faceplate,…

Q: 16. What devices are used to protect a circuit from overloads?

A: 16)  to protect a circuit from overloads

Q: Where is the Service Entrance Panel located?

A: A residential lighting layout plan is shown in the question. We need to find out in which area is…

Q: electric power system

A: NOTE- “Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: 1) The control flags type and operation?

A: Control Flag :- These flags enable and disable certain operation carried out by the microprocessor.…

Q: The Code places a maximum open-circuit voltage on lighting equipment in or on homes. This maximum…

A: The maximum open circuit voltage on lighting equipment in homes are 1000 V.

Q: single-pole portable cable connectors for a portable switchboard on stage, where used, shall be…

A: single-pole portable cable connectors for a portable switchboard on stage, where used, shall be…

Q: Is Refrigerator an open loop or closed loop system? Write the reason for your answer. For the…

A: Open loop system- Open loop system is nothing but a system in which for a given input the output…

Q: What is bus bar in electrical?

A: The bus bar in the electrical system is known as the conductor or the bunch of conductor which is…

Q: use a conventional 12 volt test light to diagnose components and wires in a computer system . True…

A:

Q: 13 - Opening of lines and / or distribution outlets for load flow control, maintenance and…

A:

Q: List the minimum service drop clearances required by the NEC in the following residential…

A: The minimum service drop clearance required by the NEC (120 V/240 V) for the following residential…

Q: What is the purpose of the NEC?

A:

Q: What is the meaning of calculated load?

A: Since many different loads are connected to an electrical supply, it is extremely important to know…

Q: In installing a telephone system in a building, PABX is used up to the riser (conduit is used) and…

A: It is mentioned that in installing a telephone system in a building, PABX is used up to the riser…

Q: 1. What motor is used in the washing machines? Explain in detail the construction and working of the…

A: Motor used in the washing machine is Universal motor. The universal motor is an…

Q: Answer the Following questions: 1- Draw wiring diagram of domestic refrigerator, showing the main…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: Is it okay to use a cable tray for the horizontal path of telephone lines to their specific outlets?…

A: EMT conduit size (inch) Number of cable 1  4 1-1/4 6 1-1/2 8 2 14 2-1/2 17

Q: 18. How many electric meters are provided for this residence?

A: As per the bartleby rule you can ask only one question at a time so please ask other question…

Q: draw a pictorial/wiring diagram of the jumpers connected to the front panel of a computer system…

A: The Front Panel Connections, also known as the Front Panel Header or FPanel, are a collection of…

Q: Airframe Electrical System Question: What is the maximum acceptable voltage drop from the voltage…

A: The maximum acceptable voltage drop from the voltage source to the utilization equipment's ground in…

Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).