BU 2-2

Automatic Transfer Switch

A device that is basically a double throw switch of generally 3-pole connection that will automatically transfer the power from the standby generator to the building circuitry during electrical power failure.

TW in electrical wire specification

Moisture resistant, in wet and dry location.

Intranet

A private network accessible only to an organization's staff using LAN and WAN.

Private Automatic Branch Exchange.

PABX or PBX means

Series circuit

A circuit type where components are electrically connected end to end.

Wireless Phone

A telephone that uses radio and has base unit.

Transformer

A mechanical device used to step up or step down voltage in AC.

Farad

Unit of capacitance

Pre-Action Sprinkler Systems

Provide the best protection against both fire and accidental water damage. Sprinkler system used for areas where sensitive documents and computer equipments are kept such as museum and data centers

Foam water

Highly recommended for a sprinkler system designed for high hazard areas such as power plants, offshore oil rigs, aircraft hangars, chemical storage or processing facilities.

Foam-Water Sprinkler Systems

The best choice for high-hazard areas.

Switch

A control device that interrupts or allows the flow of current, not an energy-storing or energy-converting component.

source, conducting path, electrical load

basic elements of an electrical circuit are

Voltage

Analogous to pressure in water flow, representing a driving force that causes flow.

heat-resistant thermoplastic

The trade name for an insulated conductor with type letter THHN is _

Copper

is considered the best conductor of electricity.

Aluminum

Lightweight but less conductive than copper.

Iron

The least conductive of the options.

Gold

Corrosion-resistant but expensive.

Underground feeder and branch circuit cables

Shall have an overall covering that is fungus resistant and corrosion-resistant.

Michael Faraday,

Who first worked on the induction principles of electric generators and transformers

Farad (F)

The unit of capacitance is the __, named after Michael Faraday.

Cable Tray

A unit or assembly units or sections and associated fittings forming a rigid structural system used to support cables.

Fusible material in a fuse

May be made of any of the following except iron.

Iron in fuses

Has a high melting point and high resistance, making it unsuitable for fuses as it would not melt quickly enough to protect the circuit.

120 volt-amperes.

what is the prescribed load (wattage) computation for general lighting and general-use receptacle

Special purpose outlet

Considered to be outlets for appliances like air conditioning units, water pumps, and water heaters due to high power consumption and unique electrical needs.

Branch circuit

Refers to the circuit conductors between the final over-current protecting the circuit and the outlet(s).

Raceway wiring

A method of wiring that involves the use of enclosed channels of metal or non-metallic materials designed expressly for holding wires, cables or busbars with additional functions.

Electrical equipment examination criteria

Electrical equipment are examined, identified and installed based on its mechanical strength, electrical insulation, and heating effects.

Circuit breaker

A device in electrical system used as circuit protection designed to open or close a circuit by non-automatic means and to open the circuit automatically on a predetermined over current without damage to itself when properly applied within its prescribed rating.

Small UPS systems

Uninterruptible power supplies designed for small-scale applications.

Security Cameras

Devices used for surveillance and monitoring.

Automation Equipments

Devices used to automate processes and tasks.

High power consumption appliances

Appliances that require special wiring, circuit breakers, and outlets due to their electrical needs.

receptacle

In an outlet, it is the contact device designed for the connection of a single attachment plug.

switch

Controls flow of electricity but not used for plugging in.

contactor

Switch for high power circuits.

junction box

Typically, a square, circular, rectangular or octagonal metallic or non-metallic box or enclosure used in protecting wires and cables and where splices are made for branches.

circuit

A continuous path of an electric current composed of conductors, conducting path and load.

fuse

It is a simple type of overcurrent protective device consisting of a fusible link or wire of low melting temperature so that when subjected to excess current the energy loss in the link generates heat and melt it resulting in its self destruction.

four-way switch

A switch used in conjunction with two (2) three switches used to control lights in three different locations independently.

upright sprinkler

commonly used in high ceiling areas, harsh factories and mechanical rooms and obstructed space.

heat detector

Protective device used in the kitchen that responds to a rapid heat increase rather than smoke, reducing false alarms caused by cooking fumes or burnt food.

siamese connection

A fire department connection that allows firefighters to supply water to a building sprinkler system / standpipe system.