connection to other sources
Electrical Wiring Residential 17 edition (2012)
... a metal tool onto live parts, allowing metal shavings from a drilling operation to fall onto live parts of electrical equipment, cutting into a “live” conductor and a “neutral” conductor at the ... available to keep the journeyman up to date on codes and other related topics and skills Journeymen electricians who have an interest in teaching apprentices will usually have to take instructor training ... contractors to be licensed This usually means they have taken and passed a test To maintain a valid license, many states require electricians and electrical contractors to attend and satisfactorily...
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Báo cáo khoa học: "User Requirements Analysis for Meeting Information Retrieval Based on Query Elicitation" pdf
... regarding a topic (7); what task someone was assigned (4); who made a particular decision (2); what was the participants' reaction to a particular topic (1); what the future plan is (1) The other instances ... assigned to interviewee (4); whether a particular decision was made (3); what decisions were made (2); reasons for a decision (1); reactions to a topic (1) The thematic questions concern topics ... of topics) The study we present in this section is aimed at assessing how difficult it is to answer the questions that users typically ask about a meeting Our goal is to provide insights into:...
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swimming pools 4ed philip h perkins 2
... Remedial work to precast concrete block paving Remedial work to clay pavers Remedial work to slippery paving Preventing trips and falls Repairs to external works: walling 10.13 Remedial work to free-standing ... damage to foundations, and to drains and other pipelines Leaves can cause discolouration of the pool water and staining of the pool finish which is difficult to remove It is advantageous to utilise ... satisfactory as if it had been done properly the first time One of the worst things that can happen is for the contractor to go into liquidation during the contract The cost of employing another...
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requirements engineering for sociotechnical systems
... Acquisition Editor: Senior Managing Editor: Managing Editor: Development Editor: Copy Editor: Typesetter: Cover Design: Printed at: Mehdi Khosrow-Pour Jan Travers Amanda Appicello Michele Rossi Toni Fitzgerald ... part of the problem to model as a control process, what to model as a data transformation process, and what to model as data Practitioners also find it difficult to know when to stop process decomposition ... Requirements management tools collect together the system requirements in a database or repository and provide a range of facilities to access the information about the requirements (Kotonya & Sommerville,...
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A research proposal submitted in partial fulfillment of the requirements for the degree of Master of Business Administration
... a store image which will appeal to the customers In this way, the retailer can possibly encourage the consumers to “patronize” the store Consumers are often motivated to patronize a retail store ... Anyway, half of the customers entered supermarkets to buy everyday necessities Next reason to attract customers to come to supermarkets is people curiosity of the new western style store Moreover, 46% ... shopping place: their shopping behavior, store choice criteria and expectations from such a store • to find out the likely ways to shift their behavior toward the store’s position • based on the findings,...
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BUILDING CODE REQUIREMENTS FOR STRUCTURAL CONCRETE (ACI 318-99) AND COMMENTARY
... strength reduction factor φ The required axial load, moment, and shear strengths used to proportion members are referred to either as factored axial loads, factored moments, and factored shears, or ... 50 Silica fume conforming to ASTM C 1240 10 Total of fly ash or other pozzolans, slag, and silica fume 50† Total of fly ash or other pozzolans and silica fume 35† * The total cementitious material ... unfamiliar to code users References to much of the research data referred to in preparing the code are cited for the user desiring to study individual questions in greater detail Other documents...
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Requirements for the Generic Bus Driver Model
... that device To keep it simple, the bus driver maps each function to one driver (there is a one -to- one mapping of a hardware function to a loaded device driver) To select the driver to load, the ... required in descriptors to group interfaces into functions, this is a problem for a generic bus driver • Self-describing - The interface descriptor in ROM describes the function to a generic bus ... (access to one function does not require knowledge of another function's state or access to another function) Applying the Requirements to USB Devices and Interfaces Some USB device designs fit...
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Requirements for entry
... knowledge” He also pointed out that a doctor neither needs to nor should try to sort out every problem him or herself: “the best doctors know to whom to turn for help” Many medical schools, when ... others, it is much more difficult Most television medical programmes glamorise and trivialise, and give little insight into the everyday undramatic life of a doctor The BBC TV series Doctors to ... indicators of the potential to become “a good doctor” – a product difficult to define, not least because medicine is such a wide career that there may be many different sorts of good doctors –...
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IEEE Recommended Practice for Software Requirements SpeciÞcations
... E1340-96 Prototypes are useful for the following reasons: a) b) c) The customer may be more likely to view the prototype and react to it than to read the SRS and react to it Thus, the prototype provides ... easier to transfer the software product to new users or new machines Customers thus Þnd it easier to transfer the software to other parts of their organization, and suppliers Þnd it easier to transfer ... endeavor well enough to specify requirements for a satisfactory system Therefore, the customer and the supplier should work together to produce a well-written and completely understood SRS A special...
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Tài liệu Cabling Standard - TIA 607 - Commercial Building Grounding and Bonding Requirements for Telecommu doc
... or enclosure bonded to the TMGB use listed 2-hole compression connectors, exothermic type welded connections, or equivalent for the bonding conductor connections be bonded to all metallic raceways ... attached to each telecommunications bonding conductor be located on conductors as close as practicable (ie., ease of access to read the label) to their point of termination be nonmetallic Refer to ... insulated copper conductor have minimum conductor size of No AWG, and as large as No AWG be bonded together with a TBB interconnecting bonding conductor (TBBIBC) at the top floor and at a minimum...
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Tài liệu Module 3: Using a Conceptual Design for Data Requirements docx
... interviews with users, managers, and other customers • Shadow users, managers, and other customers to gain first-hand knowledge of the skills and experience necessary to perform a task • Collect artifacts, ... factors that influence the actions of each use case What happens behind the scenes to make this possible? What does the system have to to make the use case possible? What does the actor have to ... need to do, rather than on the tools they will use to it, will be easier if the tools supplement the task, rather than the task being dictated by the tools Avoiding the trap of going straight to...
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iec 60269-2-1 low-voltage fuses - supplemetary requirements for fuses for use by authorized perso
... $7:LJ9D:JH5J9651DG:7HHJ9740G5E7GEG TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT /F \DP037G5@h&i 5to5 @-h&i TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ... TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT @F? \DP037G5@h&&i 5to5 >h&&i TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT ... TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT @B@ \DP037G5@h&Vi 5to5 dh&Vi TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT...
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iec 60269-2 low-voltage fuses - supplementary requirements for fuses for use by authorized person
... capacitors Spộciợùiuition relative aux ộlộments de remplacement haute tension destinộs des circuits comprenant des moteurs 644 (1979) S e i i a i n for high-voltage fuse-linka for motor pcfcto ... sub-clauses corresponds to the latter Regarding the tables, their numbering also corresponds to that of I E C Publication 269-1; however, when additional tables appear, they are referred to by capital ... requirements apply to fuses for use by authorized persons Fuses for use by authorized persons are generally designed to be used in instaliations where the fuse-links are accessible to, and may be...
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iec 60269-4-1 low-voltage fuses - supplementary requirements for fuse-links for the protection of
... voltages and currents are as follows: – 130 V a.c up to 000 A; – 250 V a.c up to 800 A; – 500 V a.c up to 200 A; – 700 V a.c up to 600 A; – 000 V a.c up to 800 A 7.1 Mechanical design The standardized ... protection of semiconductor devices – Sections I to III: Examples of types of standardized fuse-links Explanatory note – In view of the fact that this standard should be read together with IEC 60269-1 ... numbering of its clauses and subclauses is made to correspond to the latter General Fuse-links for the protection of semiconductor devices according to the following sections shall comply with all...
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iec 60269-4 low-voltage fuses - supplementary requirements for fuse-links for the protection of s
... at the bottom of the page 2.2.14 Semiconductor device (according to IEC 60050(521)) A device whose essential characteristics are due to the flow of charge carriers within a semiconductor `,,`,`,``,````,,,,,`,````,```-`-`,,`,,`,`,,` ... clauses, subclauses and tables is made to correspond to the latter Change reference IEC 269-1 to IEC 60269-1 throughout this standard Page 11 2.2.14 Semiconductor device Replace the existing subclause ... fuse-links in all other cases, switching over to another source of supply being permitted after 15 s if the switching time (interval without voltage) does not exceed O, s For all other tests, the...
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iec 60364-7-707 electrical installations of buildings - requirements for special installations or
... requirements is to provide high-integrity protective circuits by using robust or duplicate conductors in association with permanent connections or robust connectors Protective conductors shall have ... conductor specified in Items a), b), c) and d) shall meet the other requirements of Section 543 707.471.3.3.2 Earth continuity monitoring Note - T h e aim of these requirements is to monitor the ... or N are connections to the incoming supply and PE is the connection from accessible parts of the equipment to the main earthing terminal of the installation for both protective conductors of...
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iec 60439-2 low-voltage switchgear and controlgear assemblies - particular requirements for busba
... busbar trunking due to thermal expansion of the system NOTE The expansion element may apply to the conductor within the enclosure or both enclosure and conductors according to the design 2.3.1 ... trunking unit intended to change the relative positions of the phase conductors in order to balance the inductive reactances or to transpose the phases (such as Ll-L2-L3-N to N-L3-L2-L1) COPYRIGHT ... of the conductors being considered at a temperature of +20 OC,per metre length: - f?bo phph phase -to- phase - ßbO phN phace -to- neutral - ß b o phpEN phase -to- PEN - ß b o phpE phase -to- PE the mean...
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iec 60439-3 low-voltage switchgear and controlgear assemblies - particular requirements for iow-v
... resistance to heat shall be verified according to 8.2.1 The resistance of insulating materials to abnormal heat and to fire due to internal electric effects shall be verified according to 8.2.1 ... subjected to the impact tests Add to the end of the clause: Any cover which has to be removed during installation or maintenance shall not be used to support components to which conductors are ... to rusting and to humidity 8.2.1 Verification of resistance to rusting and to humidity 1* 3* 8.2.14 k) Resistance of insulating materials to heat 8.2.1 i) Resistance of insulating materials to...
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iec 60439-4 low-voltage switchgear and controlgear assemblies - particular requirements for assem
... conductance shall be at least equal to that referred to in 7.4.3.1.7; - it shall be possible to connect additional protective conductors at any pre-determined tap-off point Add to paragraph f): When plug ... the site installation and intended: - for connection, either to the public mains or to the transformer sub-station or to the site generator, and - for the metering of the electrical energy consumed ... supply and metering ACS or the main distributing ACS and to which the distribution conductors supplying lighting current and power to other ACS or machines are connected 2.1 1.4 Transformer ACS...
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