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Electrical Codes for Electrical Circuits

electrical-codes-for-electrical-circuits

Summary: Listing of electrical codes for circuit with examples of electrical circuit codes for home electrical wiring.


Electrical Code Definitions for Home Electrical Circuits



Introduction to General Electrical Circuitry
GENERAL CIRCUITRY

NEC 210-11, 422-12 In addition to the branch circuits installed to supply general illumination and receptacle outlets in dwelling units, the following minimum requirements apply:
. Two 20-amp circuits for the kitchen receptacles
. One 20-amp circuit for the laundry receptacles
. One 20-amp circuit for the bathroom receptacles
. One separate, individual branch circuit for central heating equipment.


Code Adoption Information: The codes shown are examples only and may not be current or accurate for your application or jurisdiction. Contact your local building authority for complete information.

NEC Codes:

NEC 210.11 General Circuitry bathroom One 20-amp circuit for the bathroom receptacles.

NEC 210.11 General Circuitry central heating equipment
One separate, individual branch circuit for central heating equipment.

NEC 210.11 General Circuitry kitchen Two 20-amp circuits for the kitchen receptacles.

NEC 210.11 General Circuitry laundry One 20-amp circuit for the laundry receptacles.

NEC 240.4 General Circuit Requirements
conductors protected per ampacity Generally, conductors shall be protected in accordance with their ampacity per Table 310.16 and 240.4(D)
Fuse or Circuit Minimum Wire Size Breaker Size Copper Conductor Aluminum Conductor
Breaker...Copper....Aluminum
15 amp......14........N/A
20 amp......12........N/A
30 amp......10.........8
40 amp.......8.........6
50 amp.......6.........4
Note: Conductors that supply motors, air-conditioning units, and other special equipment may have overcurrent protection that exceeds the general limitations in the above chart. Consult the conductor insulation type for correct ampacity rating.


406.3 General Circuitry Outlets
Receptacle outlets shall be of the grounding type, be effectively grounded, and have proper polarity.

406.8 General Circuit Requirements outdoor outlets
All 15- and 20- amp, 125- and 250- volt receptacles installed outdoors shall be listed as weather-resistant.

406.11 General Circuit Requirements Dwellings
All 1 25-volt, 15- and 20- amp receptacles installed in dwelling units shall be listed tamper-resistant. This includes receptacles installed outdoors, in basements and in garages.

408.4 General Circuitry circuit labeling All circuits and circuit modifications shall be legibly identified as to purpose or use on a directory located on the face or inside of the electrical panel doors.

408.36 Electrical Services plug-in back fed overcurrent devices Plug-in type overcurrent devices that are back-fed shall be secured by an additional approved device.

422.12 General Circuitry kitchen Two 20-amp circuits for the kitchen receptacles

Residential Electrical Code Examples for Circuits


IRC Codes:

Circuits
1.Circuits to ranges and dryers and similar appliances shall be four-wire and the bonding jumper shall NOT be connected between the neutral terminal and the frame of the appliance. 2003 IRC E3603

2.Range circuits shall be a minimum 40 amp using #8 wire. NEC 210.19 (3)

3.Dryer circuit shall be 5000 watts or the nameplate rating, which ever is larger. NEC 220.18

4.A general lighting circuit shall be provided for each 3 volt-amperes for every square foot. NEC 220.3

5.Kitchen exhaust hoods shall not be on the same circuit as either of the two required small appliance branch circuits. NEC 210

6.Garbage disposals, dishwashers, trash compactors and other motor loads are not permitted on the small appliance branch circuits. NEC 210

7.The two 20 amp small appliance circuits serving the kitchen, pantry, breakfast room, and dining room shall have no other outlets. NEC 210.52 (B)(1)

8.Bathroom receptacles shall be supplied by at least one 20-amp circuit that shall have no other outlets. If the circuit serves a single bathroom, the lights in that bathroom may be on the same circuit. NEC 210.52


Always contact your local building authority for complete and up to date code information.




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