Engineering Assignment Electricity and Lightning

Added on - 29 Apr 2020

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Electricity And Lightning For Building Services Engineering1ELECTRICITY AND LIGHTING FOR BUILDING SERVICES ENGINEERINGBy NameCourseInstructorInstitutionLocationDate
Electricity And Lightning For Building Services Engineering2Contents2.3 Uninterrupted power supply..........................................................................................................2Features of the uninterrupted power supply....................................................................................2Characteristics of uninterrupted power supply.................................................................................2Analysis of the application of the uninterrupted power supply........................................................53.2 safety principle when handling the electrical circuits......................................................................5Equipment used in the domestic electrical installation.....................................................................73.3 overcurrent protection devices.......................................................................................................9Specifications...................................................................................................................................11Testing and commission..................................................................................................................123.4 cable size.......................................................................................................................................13Factors to be considered when calculating cable size.....................................................................14DOL connection...........................................................................................................................14Star-delta starting........................................................................................................................14Cable factors....................................................................................................................................144.1 legislation and standard of fire system in the industrial/commercial building..............................154.3 Types kinds of cable associated with fire alarm system.................................................................18Non plenum.....................................................................................................................................19Riser.................................................................................................................................................19Firepower limited (plenum).............................................................................................................19Multi-conductor (plenum)...............................................................................................................19Mid-capacitance (plenum)...............................................................................................................19Firepower limited (non-plenum).....................................................................................................20Multi-conductor, non-plenum.........................................................................................................20Mid-capacitance (non-plenum).......................................................................................................20Multi-paired (non-plenum)..............................................................................................................204.4 fire protection systems..................................................................................................................21Design fire protection systems for industrial and/or commercial buildings with fire load density..215.2 LIFTS AND CONTROL PANELS.........................................................................................................23B. Design and apply appropriate methods of installation and wiring circuit...................................235.4 design for a lift control panel and installation requirements for a 5-story lift installation.............24Types of lift control for AC motor....................................................................................................26References...........................................................................................................................................28
Electricity And Lightning For Building Services Engineering32.3 Uninterrupted power supplyFeatures of the uninterrupted power supplyThe size is compact and is ergonomically designed to allow for the placement of theUPS on top of the desk or any strategically located environment.This system has a perfect system protection for the overload, short-circuiting, anoversupply of the voltage, and an overheating of the system.It increases the boost and the buck AVR for the stabilization of voltage.It optimizes the reliability by the use of excellent microprocessors contained in theuninterrupted power supply.The UPS has three modes which include Line mode, battery mode, and faultalarms[ CITATION Fed09 \l 1033 ].It resets automatically when the AC is recovering.Its eco-friendly, user-friendly and frequency auto adaptiveThere is low maintenance cost due to the AVR protection function.The UPS has wide input range i.e. it has a large input of the voltages.Uninterrupted power supply system is easy to install[ CITATION Dir15 \l 1033 ]Characteristics of uninterrupted power supplyIn connection with the building management in the data center the following factor has to beconsidered; resilience, manageability of the UPS, control of the bypass, maintainability andthe comparison of the output key components to the building management needs.ResilienceThis UPS is typically a reliable device but can be of great effect to the failure of theservers connected to it. If there is virtualization of each server and multiple virtualizedmachines are hosted, the disruption of the potential workload can be great. Hence any datacenter must put into account the resilience factor. The selection of the UPS that can support
Electricity And Lightning For Building Services Engineering4numerous power inputs must be considered, this will allow the powering of the UPS unit bytwo different sources. This implies that when there is a failure in one utility line then theother shall keep the load running and also charging the uninterrupted power supply[ CITATIONPlaceholder1 \l 1033 ].The second option is, the parallel operation supported by the Uninterrupted PowerSupply system. This will allow for greater operating time and when there is a failure in theparallel battery then there will be power to run the UPS. Since two UPS system runs inparallel it is known as +1 redundant. But if there is the parallel configuration of the UPS thenit is referred to as the architecture of N+1, where N is the required load supplied by thedevice and +1 is the value that determines the load demand that is required when there is afailure in one UPS. Despite this consideration, there is a recommendation of the assessmentof the device and the stability of the UPS as there are changes in the conditions of the load.The preference in the use of parallel operation by the data center manager to aid in the scalingup of the capacity of the UPS[ CITATION Placeholder1 \l 1033 ].Most of the servers have a redundant supply of power. Additional resilience can beachieved by the use of redundant power supply due to the connection of the servers. Themanagement should make the connection of supply to one line and the next supply to theUninterrupted Power Supply.Management and monitoringThe manageability is one of the important factors that the managers have to consider.For the smaller installations, there should be the use of the USB and RS-232 that is known asthe serial ports. But the inclusion of the IP connection by data center UPS system should bedone to allow the management of the remote across Ethernet LAN. This mechanism alsosupports the servers of the remote and the storage in the management of the system. Proper
Electricity And Lightning For Building Services Engineering5management system allows monitoring of the equipment in any location and alarm signalsare sent if something went wrong. This implies that critical information should be directed tothe building management system.The distribution of the power is a responsibility of the facility personnel, hence theintegration of the building management system is equally important. When there is an alertthat there is a problem, the information must be passed to the IT expert. The typical interfaceis applied to monitor and manage the UPS and the administration is also allowed to tracknumerous factors such as the availability of power and the load current, running time and thetemperature of the Uninterrupted Power Supply[ CITATION Art14 \l 1033 ].Capability of the bypass controlThe working of the UPS unit is extended beyond the use of the transformer and thebasic design. This factor has the capability of allowing the UPS to be removed from thedistribution power system. This also allows the prevention of the defective UPS that causesthe outage of power which tends to prolong the downtime. This ability to bypass permits themaintainability and the repair without load disruption.Maintenance and the output;This characteristic should be considered especially at the battery. The maintainabilityand repair of the UPS should be easy and the technicians should use the field replaceablebatteries for the upgrade. Hot-swappable batteries in the UPS gives room for the replacementof the damaged batteries.Analysis of the application of the uninterrupted power supplyUninterrupted power supply is mostly applied in the electronics devices. The applications areof a wider range. They include
Electricity And Lightning For Building Services Engineering6Power supply in computers; the current power supply in the computers have powerswitch mode that aids in the conversion of the AC power to DC power voltages. Thisswitching supply helps in the replacement of the linear supplies as a result ofimprovement of the cost, weight and the size. The variation of the current drawn isdue to the collection of the output voltage.Power supply for the Electric vehicle; this type of vehicle deeply rely on the createdenergy from the electricity generation. Supply of the power is part of the design whichdirectly relates to the conversion of the power battery voltage.Welding power supply; this power supply provides the electricity in form of AC andDC for the melting of metal surfaces in Arc welding. The welding arc requires highcurrent which ranges between 100A to 300 A. Besides, the welding power supply hastransformers that drive the generators[ CITATION Placeholder2 \l 1033 ].3.2 safety principle when handling the electrical circuitsI.When handling the electrical circuits always makes sure that you put on rubber glovesand appropriate goggle.II.When handling the electrical appliance's water should avoid data all costs and oneshould never touch electrical appliance with wet hands. With the water in the hand,there is an increase in the conduction that may lead to electrocution.III.When doing installation one should not use the ladder made of aluminum. This canlead to the electric surge that might lead to electrocution.IV.When one is dealing with home appliances all the mains must be switched off toavoid electrocution. It is also recommended that one should place some indication thatthere is some work that is ongoing in that particular area[ CITATION Dav15 \l 1033 ].
Electricity And Lightning For Building Services Engineering7V.One should never use insulators that are damaged and plugs that are broken, this willalso avoid one from electrocuting that might lead to the death of the operators and anyother user.Safety proceduresDuring the installation, there are some of the safety measures that one should take intoconsideration. Some of these safety measures include;The power should be off; during the installation, one should always do the checkingon the source of power and circuit breakers to confirm if they are off. The breakersshould be locked but in case they are not locked then everybody should be madeaware that the breakers are off and then a notice has to be placed in the area that someelectrical work is ongoing.Wearing of the protective cloths and protective: when one is dealing with anyelectrical operation, they should put on protect fabric and parks which are long, suchas pants, gloves and also closed shoes. In cases where the electrical works are doneoutdoor or they are done on a larger area, they should be wearing the hard hat andsome construction gear[ CITATION Jac03 \l 1033 ].Testing should be done first; wire connection should be tested before the start of anyelectrical operation. The voltage tester should be used to confirm whether they areactually dead. This creates room for the judgment of the kind of the tools to be usedand to identify the need for the work to be done.Should always carry the right tool; during the installation, one should always have aproper tool for the kind of the work that one is doing. This will allow you to finish thework as fast as possible. It is detrimental to have the right tool during installation.Some of the tools that one needs to have are a tester used to test voltage, strippers
Electricity And Lightning For Building Services Engineering8used to strip wires amongst others. Some heavy machine is needed especially duringthe work on large scale jobs.The work should be checked; after doing the work, it should be checked for a looseconnection that might set the whole area into flames. The fire caused electrically is asa result of the electric sparks. All connections should be pulled to confirm if they aresecure. The electricity should be turned on to confirm if everything is workingcorrectly and the operation of the system is starting to work without incidences. Thecasing of the wire should be checked by the voltage tester to confirm if there are noleakages. For the case of longer lifespan, there should be the use of right insulators.And all the electrical works should be done by the professionals[ CITATION Cli03 \l 1033].Equipment used in the domestic electrical installationFish tape -this is used in the pulling of the solid wire through metal. There is the availabilityof the lube of the cableswhich aids in the pulling of the wire through the pipe.Tape measure- it is used in the measurement of the switch heights and the outlets. Also usedin centering the lighting fixture boxesHammer -used in securing the boxes with nails on the brackets. It can also be used in thedriving of the traps with romex especially when adding new Romex wiring.Channels lock pliers -this is an equipment that is used in taking of the knockouts from theboxes, down romex connectors tightening and aids in the adjustment of the ceiling fan boxesthat are expandable.Wire strippers –this is used in the removal of the insulation from the wire. They are designedwith the different type of the teeth depending on the size of the wire that is to be cut.
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