I need help answering question 4 REVIEWRefer to the National Electrical Code® or the working drawings when necessary.Where applicable, responses should be written in complete sentences.131415Complete the following table using the following circuits:1. Eleven 120-volt duplex receptacles for general use. Receptacle loads are consideredto be noncontinuous and are not subject to the 80% load limitation as applied for con-tinuous loads.Row12345OCPD Selection Amperes6OCPD Ampere Rating7Minimum Conductor Ampacity8 Minimum Conductor Size Type THHN/THWN9Ambient Temperature10Temperature Correction Factor11Number of Branch Circuits Required12Number of Current-Carrying ConductorsRaceway Fill Adjustment FactorConductor Ampacity Before Correcting/AdjustingConductor Ampacity After Correcting/AdjustingRow 1:Row 2:Row 3:2. Ten 120-volt fluorescent luminaires, rated at 150 volt-amperes each.3. Eight 120-volt incandescent luminaires, rated at 200 watts each.4. One 240-volt exhaust fan, rated at 5000 watts.5. One 120/240-volt single-phase, 3-wire feeder, 40-kVA continuous load, originating ina room with an ambient temperature of 100°F (38°C).Circuit NumberCalculated Load in Volt-AmperesCalculated Load in AmperesLoad TypeLoad Modifier1CHAPTER 4 Branch Circuits1980 VA16.5 AR116.5 A20A20A12 AWG86°F(30°C)1120.730212345Factors:• Circuits 1, 2, 3, and 4 are installed in the same raceway for a distance of 10 ft in an environment where themaximum ambient temperature will be 86°F (30°C).• Type THHN/THWN conductors shall be used for all circuits.• Minimum conductor size 12 AWG.Calculated load in volt-amperes from problem statements.Calculated load in amperes divided by voltage factor.Load type: C = continuous; N = noncontinuous; M = motor; R = receptacle.87 Row 4: 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).Row 5:Row 6:Row 7:Row 8:OCPD rating equal to or next higher standard ampere rating than OCPD selection amperes(Row 5).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). Selectfrom Table 310.16 using the appropriate 60°C for circuits rated 100 amperes or less, and the75°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: From NEC 310.16 for conductor type specified in problem statement: (THHN/THWN).Row 15: Value from Row 13 multiplied by correction and/or adjustment factors. This value must beequal to or greater than the minimum conductor ampacity value in Row 7.

Here it is asked to solve question (2), so we are solving that question only. “Since you have posted…

3 ● Row 1 2 4 5 6 7 8 9 10 11 12 13 14 15 Refer to the National Electrical Code® or the working drawings when necessary. Where applicable, responses should be written in complete sentences. Complete the following table using the following circuits: 1. Eleven 120-volt duplex receptacles for general use. Receptacle loads are considered to be noncontinuous and are not subject to the 80% load limitation as applied for con- tinuous loads. 2. Ten 120-volt fluorescent luminaires, rated at 150 volt-amperes each. 3. Eight 120-volt incandescent luminaires, rated at 200 watts each. 4. One 240-volt exhaust fan, rated at 5000 watts. 5. One 120/240-volt single-phase, 3-wire feeder, 40-kVA continuous load, originating in a room with an ambient temperature of 100°F (38°C). Row 1: Row 2: Row 3: Circuit Number Calculated Load in Volt-Amperes Calculated Load in Amperes Load Type Load Modifier OCPD Selection Amperes OCPD Ampere Rating Minimum Conductor Ampacity Minimum Conductor Size Type THHN/THWN Ambient Temperature Temperature Correction Factor Number of Branch Circuits Required Number of Current-Carrying Conductors Raceway Fill Adjustment Factor Conductor Ampacity Before Correcting/ Adjusting Conductor Ampacity After Correcting/ Adjusting 1 1980 VA 16.5 A R 1 16.5 A 20A 20A 12 AWG 86°F (30°C) 1 1 2 0.7 30 21 Type THHN/THWN conductors shall be used for all circuits. • Minimum conductor size 12 AWG. 2 3 Factors: • Circuits 1, 2, 3, and 4 are installed in the same raceway for a distance of 10 ft in an environment where the maximum ambient temperature will be 86°F (30°C). 4 5 Calculated load in volt-amperes from problem statements. Calculated load in amperes divided by voltage factor. Load type: C = continuous; N = noncontinuous; M = motor; R = receptacle.

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...