MCCCD Program Description

Load Calculations Feeder and Services

Course: ABA252

First Term: 2003 Summer I

Lecture 1 Credit(s) 1 Period(s) 1 Load
Subject Type: Occupational
Load Formula: S

Description: Calculating basic electrical Loads. Load calculations for residential, commercial and industrial facilities, including primary feeder Loads, service Loads, lighting, motors, special Loads and heating, ventilation and air conditioning (HVAC)

MCCCD Official Course Competencies
1. Describe basic procedures for making electrical Load calculations for specific service Loads and the role of the National Electrical Code (NEC). (I, II) 2. Calculate electrical Loads for residential settings including single, home, multiple family dwellings and appliance Loads. (II) 3. Describe procedures for making Load calculations for commercial and industrial facilities and variables to such calculations. (III) 4. Calculate specific Loads required for commercial buildings, including primary feeder Loads, service Loads, lighting, motors, special Loads and HVAC. (III) 5. Calculate specific Load requirements for a mobile home/recreational vehicle park facility. (IV) 6. Calculate specific required Loads for a restaurant and a hotel/motel facility. (V, VI) 7. Calculate specific required Loads for a school and a farm. (VII, VIII) 8. Calculate specific required Loads for an industrial motor control center. (IX)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.

MCCCD Official Course Outline
I. Electrical Load calculations A. Terms and definitions 1. continuous Load 2. controller 3. demand factor 4. feeder 5. panel board 6. voltage to ground 7. other B. Role of the NEC II. Basic calculation procedures A. Calculating steps for service Loads B. Minimum service ratings 1. rural pump house 2. roadside vegetable stand C. Single and multifamily dwellings 1. general lighting Loads 2. calculating electrical Load 3. small appliance Loads 4. laundry circuit 5. demand factors 6. required service size D. Sizing neutral conductors E. Optional calculations for single family dwellings F. Multifamily dwelling calculations 1. sample calculation 2. general lighting Load 3. appliance Load 4. total Load III. Commercial occupancy calculations A. National Electrical Code (NEC) B. Planning a commercial wiring installation 1. medium commercial building 2. large commercial building 3. research 4. working drawings C. Retail stores with show windows 1. procedures 2. calculations D. Office building 1. Load requirements 2. procedure 3. calculations 4. diagram/schematic E. Calculations for the primary feeder F. Main service calculations 1. type of Loads 2. Load in amperes 3. neutral 4. NEC requirements IV. Mobile home and RV park A. Sizing electrical service for mobile homes B. Types of equipment 1. power outlets 2. services 3. conduit C. Sizing electrical services and feeders for parks V. Restaurants A. Service Load B. Conductor type VI. Service for hotels and motels A. Service Load B. Conductor type VII. Optional calculations for schools A. Service Load B. NEC reference VIII. Farm Load calculations A. Farm service requirements B. Single phase transformers C. Three phase service D. Feeder Loads IX. Industrial motor control center A. Feeder sizing B. Motor control schedule

MCCCD Governing Board Approval Date: 3/25/2003

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.