Standard
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ELT 120 – Residential Wiring I
Introduces
residential wiring practices and procedures. Topics
include: residential circuits, print reading, National Electrical Code, wiring
materials, determining the required number and location of lighting/
receptacles and small appliance circuits, wiring methods (size and type
conductors, box fill calculations and voltage drop), switch control of
luminaries and receptacle installation including bonding, GFCI and AFCi circuits, special purposes outlets- ranges, cooktops,
ovens, dryers, water heaters, sump pumps, etc., and sizing OCPD’s
(circuit breakers and fuses).
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Competency Areas: |
Hours: |
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Residential Circuits |
Class |
3 |
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Print |
D. Lab |
2 |
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National Electrical Code |
P. Lab/O.B.I. |
3 |
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Wiring Materials |
Credit |
5 |
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Determining the required number and location of lighting/
receptacles and small appliance circuits |
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Wiring methods (size and type conductors box fill
calculations and voltage drop) |
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Switch control of luminaries and receptacle installation
including bonding |
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GFCI and AFCI circuits |
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Special purposes outlets (ranges, cooktops, ovens, dryers,
water heaters, sump pumps, etc). |
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Sizing OCPD’s (circuit breakers
and fuses) |
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Prerequisite:
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ELT 119, IFC 100, IFC 101 |
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Corequisite: |
ELT 106, ELT 121 |
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Need Guide Material from Working Committee |
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Course Guide
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Competency |
After completing this section, the student will: |
Hours |
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Class |
D. Lab
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P. Lab/
O.B.I. |
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RESIDENTIAL CIRCUITS |
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Load calculations |
Determine square footage. |
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Calculate the requirements for general lighting. |
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Determine minimum number of lighting branch circuits
required. |
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Calculate individual circuit load. |
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Compute the size of service entrance conductors. |
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Balance the total load per phase (single phase). |
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Calculate small appliance loads. |
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Calculate the load for laundry circuits. |
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Calculate the load for special-purpose circuits. |
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Installation |
Install circuit breakers in panel. |
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Install main service panel. |
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Ground service entrance equipment. |
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Discuss installation of the temporary service entrance. |
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Install main service disconnect when applicable. |
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Overhead service |
Ground service entrance equipment. |
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Install mast-type, thru-the-roof, or SEU
service entrance. |
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Install main service disconnect. |
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Install service entrance cable to service drop. |
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Install main service panel. |
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Install circuit breakers in panel. |
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Underground service (includes demonstration) |
Ground service entrance equipment. |
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Install main service panel. |
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Discuss installation of underground service entrance. |
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Mobile home service |
Ground service entrance equipment. |
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Discuss installation/connection of mobile home service. |
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Install circuit breakers in panel. |
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Flush and surface mounting of switch boxes |
Install (bar-hangar) mounted box. |
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Install flush mount switch and outlet box for a drywall,
lath or plaster wall, or paneled wall. |
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Install flush mount switch and outlet boxes for a masonry
wall. |
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Install gang boxes. |
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Install outlet boxes for receptacles and switches in
existing walls. |
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Flush and surface mounting of receptacle boxes |
Install surface mount boxes. |
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Install octagon outlet box. |
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Install underground, watertight box. |
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Rough in the circuit for a device
controlled by two 3-way switches with feed to the switch box. |
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Rough in the feed to the device outlet
box. |
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Install device controlled by two 3-way switches and one
4-way switch with feed to a 3-way switch. |
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Rough in the circuit for a device
controlled by two 3-way switches and one 4-way switch with feed to the
device. |
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Rough in the circuit for a device
controlled by two 3-way switches and two 4-way switches with feed to a 3-way
switch. |
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Rough in duplex receptacle circuits with
two 3-way controlling one-half of each of two duplex receptacles. |
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Rough in cables for a single pole switch controlling one
or more lights/devices with a feed to the switch box. |
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Rough in cables for a single pole switch controlling one
or more lights/devices with a feed to the light/device box. |
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Rough in circuit for a single pole switch controlling
three lights or devices with feed to the end light device box. |
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Rough in circuit for two 3-way switches controlling one
device using conduit and 4-inch square boxes with plaster rings. |
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Small appliance circuits |
Rough in armored cable to outlet box. |
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Rough in nonmetallic cable in outlet
boxes. |
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Rough in cable or conduit for branch
circuits. |
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Special-purpose circuits |
Rough in 120- or 240-volt circuits to distribution panel
using nonmetallic sheathed cable. |
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Rough in line voltage thermostat wiring. |
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Rough in a circuit for a split-circuit
duplex receptacle. |
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Low voltage circuits |
Rough in the circuit for a door chime system. |
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Rough in low-voltage thermostat wiring. |
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Rough in a residential telephone wiring
system. |
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Rough in a residential CATV wiring
system. |
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Making taps |
Install surface raceways. |
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Connect 120/240-volt circuits to circuit breaker panel
using non-metallic cable. |
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Discuss swimming pool electrical considerations
(workmanship, safety, and trim-out). |
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Underground wiring and sub-feeders |
Discuss underground conduit installation methods. |
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Discuss direct burial cable. |
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Run feeder cable from main service panel to auxiliary. |
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Add-on receptacles |
Rough in cable between an existing box
and a newly installed box. |
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PRINT |
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Symbols |
Identify components on a blueprint. |
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Identify branch circuits. |
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Calculate load requirements. |
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Determine locations of receptacles. |
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Estimate the amount of wiring materials. |
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Architectural and mechanical symbols |
Identify typical architectural and mechanical symbols on
building plans. |
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NATIONAL ELECTRICAL CODE
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Determine the function of the National Electrical Code. |
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Components |
Identify the components of the National Electrical Code. |
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Local code requirements |
Interpret local code requirements with the National
Electrical Code. |
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Ampacities and conduit fills |
Calculate the ampacities and conduit fills according to
the National Electrical Code. |
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Ground fault interrupter |
Determine ground fault interrupter requirements for a
single-family residence. |
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WIRING MATERIALS |
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Determine proper conductors and insulators. |
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Wiring procedures |
Demonstrate wiring procedures. |
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DETERMINING THE
REQUIRED NUMBER AND LOCATION OF LIGHTING/ RECEPTACLES AND SMALL APPLIANCE
CIRCUITS |
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WIRING METHODS
(SIZE AND TYPE CONDUCTORS BOX FILL CALCULATIONS AND VOLTAGE DROP) |
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SWITCH CONTROL OF
LUMINARIES AND RECEPTACLE INSTALLATION INCLUDING BONDING |
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GFCI AND AFCI
CIRCUITS |
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SPECIAL PURPOSES
OUTLETS (RANGES, COOKTOPS, OVENS, DRYERS, WATER HEATERS, SUMP PUMPS, ETC). |
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SIZING OCPD’S (CIRCUIT BREAKERS AND FUSES) |
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Suggested Resources
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Alerich,
Walter N.; Electrical Construction Wiring, American Technical Society, ISBN 0-8269-1420-9
Mullin,
Ray C.; Electrical Wiring Residential, Delmar Thomson learning, ISBN 0-7668-3284-8
Rockis/Mazur;
Electric Motor Controls (2nd
ed.), American Technical Publishers ISBN
0-8269-1675-9
Rockis,
Gary; Residential Wiring, American Technical Society, ISBN 0-8269-1652-
Plant Engineering / Electrical
Maintenance, Plant Engineering Training Systems, Technical Publishers Co. ISBN unknown
National Electrical Code, National Fire Protection Association, Inc., ISBN
0-87765460-3
NEC 2002 Code,
Published by NFPA, Distributed by Delmar Publishers