2 Chapter B Review Refer To The National Electrical Code Or The Working Drawings When Necessary Where Applicable Respo 1 (27.29 KiB) Viewed 36 times
2 Chapter B Review Refer To The National Electrical Code Or The Working Drawings When Necessary Where Applicable Respo 2 (37.33 KiB) Viewed 36 times
#2 CHAPTER B REVIEW Refer to the National Electrical Code or the working drawings when necessary Where applicable, responses should be writes in complete sentences Comple the following uble ung the following circuits 1. Eleven 120-o duples receptacles for general e Receptacle loads are considered to be ones and are not subject to the NOS load limitation as applied for com tina lod 2. T 120-vefloncem luminaires, rated at 150 vob-amperes ach 3. Eight 120 volt incandescent luminaires, naed at 200 watts each. 4 One 240-volt exhaust fan, rated at 5000 watts 5 Or 120/240-lt single-phase, 3-wire fredet, 40-4VA continus loud, onpaing a room with an anhieet temperature of 100 OFC) wrot under 1 Ca La V 2 CLA 2 Lady A Last Midfu OCPO A . OCPO A 3 MCA # Mium Conductor BTTN * AntTemper 18 Temperature Conection Factor 1 Number of Branch C 12 Number Current Caming Co Ant Factor 14 Acty before Coming Aust Canucur Ana Ahar Coming Aung Factors: Cecis 1, 2, 3, and 4 are installed in the same naceway for a distance of 10 ft in an environment where the maximumanhient temperature will be 86°F 00°C). Type THEN/THWN conductors shall be ned for all circuits Minimum conductie sie 12 AWG Row Caloslated load in volt-amperes from problem statements How 2 Calculand load in amperes divided by voltage factor Row Loal type: C-contino; Noncontinuous M-motor, Receptacle.
88 CHAPTER 4 Branch Circuits Row 4: Row 5: Load modifier, 1.25 for C and M load types, 1.0 for R and N load types. Calculated load amperes (Row 2) multiplied by load modifier (Row 4). OCPD rating equal to or next higher standard ampere rating than OCPD selection amperes Row 6: (Row 5). Row 7: Row 8: Ampacity of conductor equal to or greater than calculated load amperes (Row 2). Conductor size with ampacity equal to or greater than calculated load amperes (Row 2). Select from Table 310.16 using the appropriate 60°C for circuits rated 100 amperes or less, and the 75°C column for loads over 100 amperes. Row 9: From problem statements. Row 10: From NEC Table 310.15(B)(1). Row 11: From load calculation. Row 12: From problem statements. Row 13: From NEC Table 310.15(C)(1). Row 14: Row 15: From NEC 310.16 for conductor type specified in problem statement: (THHN/THWN). Value from Row 13 multiplied by correction and/or adjustment factors. This value must be equal to or greater than the minimum conductor ampacity value in Row 7. Sw
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